Mazda Mazda3 Mazda Mazda3

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Mazda Mazda3 repairs by problem area

Engine (27%)

Transmission and Drivetrain (7%)

Brakes and Traction Control (6%)

Suspension and Steering (21%)

Electrical and Air Conditioning (23%)

Paint, Rust, Leaks, Rattles, and Trim (9%)

Other (6%)

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Chart based on 3286 repairs.
See TSBs and recalls for the Mazda Mazda3.

Mazda Mazda3 electrical repair cost distribution

$2500+ (0%)

$1000 - $2499 (8%)

$500 - $999 (8%)

$100 - $499 (30%)

< $100 (53%)

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Chart based on 513 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2021 Mazda Mazda3 4dr Hatch

186-horsepower 2.5L I4 6-speed shiftable automatic AWD

5000 mi Defective airbag replaced 

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2019 Mazda Mazda3 4dr Sedan

186-horsepower 2.5L I4 6-speed shiftable automatic FWD

5983 mi When returning the vehicle for continuing vehicle vibration, a message came up saying charging system malfunction, pull over immediately. Very cold day to be awaiting a tow so continued the last couple of miles. Battery was diagnosed as faulty and replaced. 

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2019 Mazda Mazda3 4dr Hatch

186-horsepower 2.5L I4 6-speed shiftable automatic FWD

11780 mi Recall for updated driver assistance software to prevent false positive brake application scenarios 

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2019 Mazda Mazda3 4dr Hatch

186-horsepower 2.5L I4 6-speed shiftable automatic AWD

3974 mi TSB MSP54 applied. Tech notes say it was for navigation system, no other information available 
5285 mi Recall SSP55 for parking assist system 
9281 mi Recall 4219L for automatic emergency braking system Software update performed to address HVAC blowing too hot (would bring cabin to 25C or higher, even with a set point as low as 16C) 

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2019 Mazda Mazda3 4dr Hatch

186-horsepower 2.5L I4 6-speed manual FWD

27350 mi OEM battery had failed, known issue with these 2019 hatchbacks (the batteries from the factory in Japan affected, not the sedan I guess?) Front radar sensor (for forward collision, radar cruise, etc) had failed. There's a TSB for this, and a revised part with a newly added drain holw so they don't collect water and fail. 

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2018 Mazda Mazda3 4dr Hatch

184-horsepower 2.5L I4 6-speed shiftable automatic FWD

2250 mi Navigation and infotainment system rebooted after a couple of hours driving. 

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2017 Mazda Mazda3 4dr Sedan

184-horsepower 2.5L I4 6-speed shiftable automatic FWD

9300 mi Passenger fog light not working, might be from taking ownership. Wasn't plugged properly, took 10 min to diagnose and repair. 

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2017 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

6000 mi Battery installed at factory had a bad cell, and needed to be replaced. 

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2017 Mazda Mazda3 4dr Hatch

184-horsepower 2.5L I4 6-speed shiftable automatic FWD

7000 mi Had a buzzing noise coming from a loose electrical connector. 
3000 mi Blind spot warning system on passenger side of car stuck "on". 
15000 mi TPMS light on. Would not reset. Performed TPMS master reset. 

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2017 Mazda Mazda3 4dr Hatch

184-horsepower 2.5L I4 6-speed manual FWD

14000 mi passenger seat belt warning light would intermittently come on even when no one was in the seat. Only way to stop the warning was to click the seat belt. The seat sensor seems to be very sensitive to anything on the seat including just a pen or tissue box. No fix. 
27000 mi The windshield wiper auto module was replaced under warranty. My wipers did experience failure while driving in a rainstorm. 
22000 mi

US $200
Backup camera failed 

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2017 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

8680 mi Passenger heated seat was defective and upholstery seat clip was not holding properly to the seat frame. Front seat cushions was lifting on both driver and passenger side. Seat cushion and heat pad needed to be changed.. City braking light warning light on intermittently. Dealer cleaned the sensor located on the windshield. 

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2016 Mazda Mazda3 4dr Sedan

184-horsepower 2.5L I4 6-speed manual FWD

13640 mi Unreliable Bluetooth connection. Also can't run the car's nav while streaming BT w/out the car's voice nav directions skipping. CMU software updated - problems remain, and now the backup camera display shows in forward gears from rest. 
16740 mi Body Control Module replaced due to trunk light being stuck on 100% of the time, even when trunk lid and all doors are closed. Very poor Bluetooth connectivity and general system performance. Trouble ticket still open with Mazda corporate - ongoing. 
18600 mi Infotainment CMU (the "brain") replaced. Zero improvement to poor system performance and Bluetooth connectivity. Total garbage - this is my first and my last Mazda. Another power door lock actuator replaced, but they're ALL noisy at random intervals. Crap design maybe? Squeaky and noisy and sound like utter trash. 
23560 mi Infotainment still demonstrates laggy, glitchy, and overall poor performance. I've given up on trying to get the system to perform as it should and have just accepted that it's garbage. 

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2016 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed manual FWD

1000 mi The Bose infotainment system kept glitching and would not work properly since I took delivery. The dealer ordered a new central control module. 

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2016 Mazda Mazda3 4dr Hatch

184-horsepower 2.5L I4 6-speed shiftable automatic FWD

5000 mi Updated software for nav and entertainment 

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2016 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

35 mi

US $120
OEM battery died in under 3 years. Replaced with an aftermarket battery due to previous experience with Mazda batteries not lasting 3 years. 
58000 mi

US $110
Battery failed, was apparently the original battery. Temporarily replaced with one from project car, until a replacement was purchased. 
16120 mi

C $180
Original battery died. Installed a new one myself. 
57000 mi

US $1500
condenser was leaking 

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2016 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed manual FWD

56000 mi

US $38
12V outlet stopped working, but think was blown by 3rd party plug-in heated seat cushion. Purchased and replaced with OEM outlet, plug and play. 
10000 mi Hands free unlocking not working. Replaced driver door handle sensor 

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2015 Mazda Mazda3 4dr Sedan

184-horsepower 2.5L I4 6-speed shiftable automatic FWD

21000 mi

US $950
Display monitor was "GHOSTING", that is the touch screen was reacting when there was no input from the operator. I am led to believe that this is a manufacturing defect that is mainly prevalent in a certain range of production dates. 
80000 mi

US $465
Infotainment issues 

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2015 Mazda Mazda3 4dr Sedan

184-horsepower 2.5L I4 6-speed manual FWD

3000 mi Software update yielded a bug with the navi system. Subsequent update cleared it up. 

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2015 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

22300 mi

US $120
Battery replacement 

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2015 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed manual FWD

18200 mi OEM battery failed on warranty. Replaced. 
20000 mi Cable that connected the air direction knob to the door that directs the air came partially disconnected. Dealership said that this was because it was not properly installed at the factory. Fixed on warranty. 
25500 mi During a previous repair, the tech forgot to plug the USB ports back into the radio. 

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2015 Mazda Mazda3 4dr Hatch

184-horsepower 2.5L I4 6-speed shiftable automatic FWD

10000 mi Intermittent backup camera issues (distortion or failure to activate); dealer replaced the camera 

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2015 Mazda Mazda3 4dr Hatch

184-horsepower 2.5L I4 6-speed manual FWD

6000 mi The infotainment system quit working. Dealer performed a system update while I waited. 
33000 mi Bluetooth stopped working for iphone. Update to Mazda OS. 
11000 mi GPS system refused to start or could not find sattelites. 
6500 mi The radio was rebooting after purchase. A s/w update eliminated most of the reboots. However, the system still froze when trying to listen to music on an iPhone attached via USB. Bluetooth audio also stopped. Dealer is replacing entire entertainment system based on previously problem. 
10000 mi Same problem continues. The dealer has tried updating the s/w, replacing the head unit and even the memory card with nav maps. It has now been escalated to Mazda corporate. Same as all other trips. Tried one new s/w update but no change. Likely this is a lemon. Mazda is researching this issue but has no definitive solution. 
14500 mi Same problem continues. The dealer tried updating the s/w one last time. Unsuccessful. Next step is to pursue return via lemon law. 
16200 mi The same issue as above. The dealer informed Mazda that one last s/w update did not resolve the issue. Now in discussion with Mazda corporate to designate car as a lemon and discuss financial resolution. 
17000 mi Car bought back because audio system kept rebooting and they could not fix it. 
Heads-up speed display failed to deploy or retract properly. Replacement needed. Car spent an extra day in shop waiting for part to arrive. 
21200 mi I took my Mazda 3 to the shop twice in July 2017 for problems with the TPM system. The TPM alarm would go on even if all tire pressures were proper and equal. On the second trip the Mazda dealer solved the problem. 
60000 mi

US $200
Backup camera 
80000 mi

US $1000
Car had no electrical power and would not start. If jumped, it would only work as long as the external battery was still connected. It would shut down as soon as the jumper cables were removed. Car had no electrical power and would not start. If given a jump start, it would shut down as soon as the jumper cables were removed. Replaced alternator, and battery. 
36000 mi inoperable navigation system 
36000 mi Nav still broken 
26660 mi

C $300
The original battery failed after just 3 years and 4 months. 

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2015 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

89280 mi Outside temperature no longer reading accurately (-22F outside and guage says +95F). Repair not done. It would have required removing front bumper (1-hour labour). 
21000 mi lost the center console....ie tel, maps etc. replaced a module that controlled the cruise control, radio and anything else that affected the visual controls. 
9920 mi A defrost line burned and cut off. It was repaired with a conductive paint but it did not resist. 
15500 mi The battery was changed because it did not charge anymore. 
3000 mi The infotainment system repeatedly crashed on a road trip. While at our destination we took it to the dealer who installed a software update. The infotainment system repeatedly crashed on the return trip as well. 
28000 mi The back up camera was working only intermittently. Dealer updated the infotainment system and the problem hasn't appeared since then. 

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2015 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed manual FWD

11160 mi The Bluetooth system was not linking to my phone properly 
17000 mi Software issues with syncing my phone and getting the radio to work 
28000 mi Issues with radio. Does not always go on when you turn on car. Need to turn car and off to get it going. Sometimes phone and care do not sync. 
30000 mi

US $5
replaced battery in key fob- key fob failing: CR2025 
73530 mi

US $30
Headlight, drivers side, not easy access. 
16000 mi The infotainment system was freezing on a regular basis. I upgrade the system from v31 to v55. The system now works perfectly! While I did this upgrade myself, I'm pretty sure any dealer will do it for you at N/C. 

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2014 Mazda Mazda3 4dr Sedan

184-horsepower 2.5L I4 6-speed shiftable automatic FWD

7000 mi Audio/Nav display went blank. 
8000 mi audio crashing, navigation reseting 
6820 mi infotainment: chronic 
6820 mi Air bag sensor on passenger side won't go off Beeping for unknown reason when opening or closing door, keycontrol in hand. no other reason. completely random. 
24500 mi AUTO AC button broke. HVAC controller replaced. 
30000 mi A/C fan speed not constant in manual or auto mode. Technician worked with Mazda for repair. First repair attempt, replaced alternator. Still have issue. Car goes back in on 8/27/16 
32000 mi I never received a satisfactory response from the dealership about the varying fan speed. I simply got "this is how it works." I knew I was going to be trading in the vehicle so I just let it go.  
6000 mi Maintenance reminder light would not clear. 
22300 mi Blind spot monitoring turned on and off by itself. Popping noise from audio when car is started 
27000 mi On start up, popping noise from speakers. Only for a second. Happens almost every time. Dealer could not determine the cause. Will try another dealer next month. It is still under warranty. 
27000 mi Different dealer, Milam Mazda, diagnosed the power amplifier was bad on the audio system causing static and popping noises from speakers upon start up. Replaced under warranty. All seems fine now. Update: failed again within a week. 
32000 mi Same problem and repair as in May, 2017. Audio system amplifier replaced. Again not successful. Shop will investigate further. 
33000 mi Return visit for audio problem previously detailed. To Mazda's credit, they called in a regional Mazda engineer and he determined that the problem was a malfunctioning Bose audio amplifier and not the system amplifier that had been previously replaced twice. Problem solved! 
17100 mi Battery was dead. Car wouldn't start. 
20000 mi Battery just replaced in May was dead. I suspected electrical problems. Dealer checked, said bad battery, replaced it. 
25000 mi

US $300
car wouldn't start. e-loop battery needed to be replaced. Still under partial warranty which paid 25% pro-rated 
59000 mi Battery was testing at 400 cca which was causing a battery management system malfunction light to illuminate. Dealer replaced battery to resolve 
17400 mi Frozen mazda connect system 

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2014 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

67000 mi Screen on infotainment system was "cracking" and causing phantom button presses on the touch screen, a problem Mazda extended the warranty on a few years ago. There was a wait to get the necessary part, but the actual install was quick and the warranty covered the whole cost. 
59954 mi The infotainment system malfunctioned and the screen was replaced at no cost even though the warranty had expired.  
4000 mi Screen/radio/camera/nav/etc shut off and needed to be 'rebooted' 

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2014 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed manual FWD

1860 mi Usb started freezing, called dealer told me to come in, finally gave me an appointment the following monday to get an update done which has not been done yet due to various problems on Mazda's part 
3180 mi Mazda Connect software updated from version 27 to 31. 
20640 mi Window noisy (rattle) and auto down/up window did not work every time. 
62620 mi

C $75
Heater blower was making noise when it was very cold. I replaced blower with a used part from the scrap yard. 
59000 mi

US $80
Brake light on left did not work. It was a failed component of the light controller for the rear brake light, so they ordered and replaced the part. 

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2014 Mazda Mazda3 4dr Hatch

184-horsepower 2.5L I4 6-speed shiftable automatic FWD

15000 mi The navigation instructions on the head up display stopped working. A software update was required and was completed under warranty. 
19000 mi Bose speaker in passenger side door failed. Mazda replaced the speaker under warranty. 
9000 mi Drivers door lock actuator squeals when operated. Navigation would reboot on its own at times. 
15500 mi Battery is dead. Keyed door lock would not unlock the door. Found the lock cylinder in door had detached rod that runs from the cylinder to the door latch. Reinstalled the rod. The power door locks, interior lights are inop. During last visit to repair keyed door lock cylinder, tech left the door module unplugged. 
32000 mi Entertainment system needed to be rebooted by the dealer. 
4500 mi Software update to fix radio mute issue with GPS navigation system. 
21000 mi Driver side climate control "Auto" button does not function and indicator light does not illuminate. Replacement climate control module ordered Active driving display fails to deploy when the car is started about 2% of the time. Issues mostly in early spring and early fall. Technician unable to reproduce. Replacement part ordered based on video evidence of problem. 
9500 mi Driver side climate control "auto" button non-functional. Climate control module replaced under warranty. Active driving display fails to deploy in some situations. Part replaced under warranty 
7200 mi Computer erroneously reported problem with charging system. Software was updated. 
47800 mi

US $100
Replaced battery 
57880 mi

US $600
Replaced failed infotainment computer 
70710 mi Battery replaced 
21000 mi Service bulletin for the Mazda Connect system 
29000 mi Heads up display sometimes would not pop up. Dealer did a computer reflash Heads up display periodically does not pop up. 
36000 mi Heads up display periodically gets stuck - Mazda replaced the heads up display at this time and it has been working properly since. 
30200 mi A/C auto mode button was faulty and wouldn't turn on auto mode, repaired under warranty 
66000 mi

US $55
headlights lights 
1000 mi Infotainment system update. 
4000 mi Infotainment issues. 
8000 mi Infotainment system glitches. No update available. 
17500 mi Car sent to regional service center to troubleshoot multiple problems with infotainment system 
18000 mi Multiple issues with infotainment system, CMU replaced per regional technicians. 
26000 mi Nav stuttering while using Pandora, back up cam sometimes didn't work. CMU needed to be replaced, on backorder. Lane departure warning system indicator light sometimes flashes amber, system doesn't turn on. Dealer could not replicate. 
27400 mi Nav stuttering while using Pandora, CMU replaced, issue still occasionally present (but less than before). 
35300 mi Intermittent i-ELOOP system failure, had to be sent to a different dealer with a working i-ELOOP battery tester. Battery failed test, replaced. 
61380 mi

C $400
Driver's door speaker was cracking and rattling. Speaker was replaced. 
78700 mi The infotainment system software was updated to version 27.00.000 to fix numerous issues with the software, including poor voice command functionality and failing to connect to my USB device. 
17116 mi infotainment system update to v 29.00.000 
33000 mi infotainment version update to 33.00.000 to fix continuing bugs and crashes 
45000 mi The infotainment system occasionally crashes when playing music via Bluetooth or USB. The touchscreen was replaced. The repair did not fix the problem. 
71000 mi Infotainment system update to hopefully fix crashes and lock-ups. 
127151 mi

US $95
passenger-side dashboard speaker replaced 
127872 mi

US $50
License plate bulb replaced. Based on the labor charge, it looks like less than 10 minutes. 
7000 mi Infotainment system required firmware update, was hanging when playing iPod for too long. 
27000 mi Infotainment system still crashing periodically, with MP3s, will not play OGG or ACC. No firmware updates available to attempt fix. 
31000 mi Instability/crashing of infotainment system 
27200 mi Bose woofer in driver's side front door was replaced under warranty. Speaker was cutting in and out/buzzing. 
35000 mi FM radio began cutting out and making odd noises. Dealer is replacing tuner unit per Mazda TSB. 
700 mi Nav/Infotainment freezing immediately on start up 
3000 mi Nav/infotainment intermittent freezing / audio distorsion when making calls or streaming audio Headlights dangerously low Replaced passenger rear power lock 
68820 mi Auto temperature not working, had to order part 
13900 mi The car's infotainment system remains buggy, its already gotten the most recent software and continues to randomly restart. Sometimes it forgets it has the navigation system. Dealer has tried 3-4 times to fix it, still no luck. 

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2014 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

1240 mi FM radio cuts out while driving along. Sounds like speakers have quit working, but that's not it. Terrible reception that fades in and out. 
6080 mi Infotainment system was blue screening, no navigation voice when phone connected via USB and various issues with bluetooth viewing of albums, artists, etc. Radio cuts out; it's like the treble cuts out and sounds like the speakers have a problem. There is now a TSB for this so took them out for a drive to hear the problem and showed them the TSB. New parts were then ordered. 
22240 mi Infotainment - nav highway icons remain on screen after you've left nav. Bluetooth music often plays blank song. I don't yet know if the software update fixed it. 
56000 mi

US $114
Test and replace battery 
10000 mi Infotainment system would not turn on. 
64410 mi

US $50
Brake light switch located under that dash by the brake pedal. This switch other than brake lights also controls the ability to use the keyless ignition button. The switch was not working which would not allow the car to start with the ignition button. 

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2014 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed manual FWD

48360 mi

C $100
Key Fob no longer working, replaced under warranty. 
21080 mi replace rear driver's side lock actuator for noise under warranty 
21700 mi trunk light was staying on, rear body control module was replaced under warranty, fixing issue 
25163 mi Had rear body control module replaced for second time. Aftermarket hatch LED was causing module to break and leave light off. Battery tie down strap was corroded and replaced under warranty. 
21160 mi Software update. 
8680 mi FM radio reception is terrible 
25600 mi Tuner unit replaced under warranty - TSB 
32240 mi

C $30
Brake pedal light switch failed, causing traction control malfunction light until check engine light illuminated on total failure. replaced pedal switch, fixing problem 
55800 mi

C $180
Replacement battery 

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2013 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

7100 mi trash in blower system 
8000 mi headlights flickered when applying brakes. 
25000 mi TSB for dimming headlights when applying brakes. Issue resolved with TSB computer update TPMS light triggering despite correct pressures 

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2013 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed manual FWD

36000 mi Dealer had to apply computer update to fix flickering headlights when decelerating at highway speeds. This was a quick update that worked as intended. This was a service bulletin not a recall. 
48670 mi

C $146
Headlights flashed during decceleration. Found out there was a Technical Service Bulletin for this issue which is common for these cars. The dealer reflashed the Power Control Module and it took around 1 hour to complete. 

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2013 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

15000 mi

US $145
Tom Tom navigation simply quit working, screen frozen. Mazda of Concord/Walnut Creek performed diagnosis, updated system (not w/ new map) and rebooted. They also provided a vehicle check, type pressure and fluids adjustment--without cost. 
29300 mi Strange & erratic behavior: At night when driving on low beams I would occasionally experience a dipping, dimming and PULSING of headlight beams when applying the brakes. Mazda rep. reported this was a known issue...(?!) 
29600 mi

US $120
To fix the pulsing headlights when braking, Mazda dealer performed some unexplained procedure ($120) which the service mgr said is effective "In 90 percent of similar cases".... And it seems, so far, to have done the trick. 
13900 mi Headlights dimming when braking. TSB available for issue. Update to ECU improved condition, but didn't eliminate the dimming. 
80000 mi

US $15
Headlight replacement 
37000 mi Reset computer because headlights would get very bright when braking. 
37000 mi

US $100
Replaced battery following oil change 
55000 mi

US $190
Battery degradation under cold ambient conditions. Vehicle won't start so battery was replaced. 

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2013 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed manual FWD

64500 mi TomTom nav system froze. Restarting the car did not resolve issue. Removed and analyzed SD card on computer. Found bogus lock file. System worked normally after removing lock file and reinstalling SD card. 
74000 mi

US $500
The blower motor began making a grinding noise a few months ago which became louder and higher-pitched over time. The blower motor would have failed altogether sometime in the next 2-4 months and I elected to have it replaced prior to complete failure. The motor ended up being replaced twice as the initial replacement part was defective. The second replacement was done free of charge and was successful. 
23200 mi Door lock actuator is squeaky and needs replacement. 
82000 mi

US $100
Radio stopped sending signal to speakers 

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2013 Mazda Mazda3 4dr Hatch

148-horsepower 2.0L I4 5-speed manual FWD

43400 mi

C $140
Replace battery 

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2012 Mazda MazdaSpeed3 4dr Hatch

turbocharged 263hp 2.3L I4 6-speed manual FWD

18000 mi Head unit would intermittently not play stations. I could press a station and have it play fine, change to another station, come back to the first station and it would be silent. Head unit had to be replaced. 
63000 mi

US $375
Complete failure of the horn. 
28400 mi Driving at dusk with the headlights on. Suddenly, the headlights turned off, along with all of the dash and interior lights, including dash lights that are on when headlights are off. Daylight sensor reprogrammed. Hasn't recurred, but doubt really fixed. 
4200 mi Satellite radio reception intermittent. Dealer says this is a common complaint and there is no fix. 
7000 mi

US $185
battery failure 

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2012 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

32000 mi The Headlights pulse and fan blower pulses with changes in engine rpm. I measured the voltage change and I have a 1.5 volt drop that takes over one second to recover. There was a service bulletin to address the pulsing headlights by installing new computer software. I had it performed and it reduced the headlight pulsing some. I took the car back later and the shop rushed me in and out and told me it was normal. I've just been living with it, but it doesn't instill a lot of confidence in the car and its electrical system. 
50300 mi Software Update to Re-Program voltage regulator. Symptom: Headlights dimming/flashing when brakes applied. 
86500 mi

US $25
Intermittent headlight bulb, on passenger side. 
35000 mi Software update TSB for alternator. Headlight beam would pulse briefly upon braking, resolved now. 
62000 mi

US $170
Lethargic starting, tested battery, bad cells. Replaced battery. 
13300 mi Computer required update. Known issue. Headlights would flash low/high when braking. 
25000 mi faulty door lock. 
34000 mi Electric lock makes a zzzzzit noise when locking. Waiting for part to come in. 
35000 mi Lock motor was replaced. 
30000 mi

US $220
Faulty tire pressure sensor replaced 
124000 mi

US $140
Battery would no longer hold a charge--replaced battery. 

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2012 Mazda Mazda3 4dr Sedan

155-horsepower 2.0L I4 6-speed manual FWD

65000 mi

US $100
Battery needed to be replaced. 

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2012 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed shiftable automatic FWD

68200 mi

US $20
Added some refrigerant because it was low and not cooling. I used one of the cheap $20 kits from Wal-mart and did it myself, it took 5 minutes 

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2012 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed manual FWD

5500 mi Power door locks ceased functioning from interior buttons. Body Control Module needed to be reprogrammed. Not successful, back in the shop. Power door locks finally fixed. Problem was a faulty body control module. Was replaced and problem fixed. 

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2012 Mazda Mazda3 4dr Hatch

167-horsepower 2.5L I4 5-speed shiftable automatic FWD

93000 mi

US $65
The blower resistor was burnt out. I replaced with a new genuine Mazda one I found on eBay for $65. It took less than 15 minutes. 

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2012 Mazda Mazda3 4dr Hatch

155-horsepower 2.0L I4 6-speed shiftable automatic FWD

45700 mi

US $600
Two left door lock solenoids replaced for intermittent failure to lock. Dealer at 8k mi said resultant noise was not a problem, and performed repair under 'good will'. 
71000 mi

US $25
Condensation forming on the vents after the AC was turned off. Replaced low-beam headlight bulbs. 
117000 mi Bluetooth module for OE stereo failed to remain paired to phone. Replacing the radio was cheaper than replacing the Bluetooth module. 
25000 mi "Airbag off" warning light inconsistently illuminates when adult in front passenger seat. 
43500 mi

US $65
Headlights flickering when braking. Per TSB this is due to insufficient alternator output and a software update is needed to correct the problem. Reflash of performed at dealership, problem has not reoccurred. 
34481 mi

US $593
Replaced Entire (Bose) Sound System 
51000 mi

US $50
Replaced Horn that was going bad, did not made a loud noise anymore 
133000 mi

US $65
Headlights flash on braking due to PCR programming issue. Updated PCR software to resolve issue. 
76000 mi My headlights would pulsate when I was decelerating. The shop applied a known software fix to rectify the problem. 
44000 mi

US $80
Fog lights relay went faulty at 18k miles. Replaced at 44k miles. 
66000 mi

US $150
AC clutch bearing making rattling noise. Have to replace entire AC compressor to fix. 
67000 mi

US $650
Replaced AC compressor to stop rattling noise from clutch bearing. 

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2011 Mazda MazdaSpeed3 4dr Hatch

turbocharged 263hp 2.3L I4 6-speed manual FWD

63000 mi

US $120
HID Xenon headlight burned out, so replaced them both, but that required removing the front bumper cover and the headlights. The HID headlight bulbs cannot be replaced unless the headlight housings come out of the car. Regular headlights on regular Mazda 3s do not require such dismantlement and can be converted to LED headlights. 

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2011 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed shiftable automatic FWD

46500 mi

C $50
Signal light holder melted. Repairable without replacement. 
17000 mi

US $89
replace battery 
32000 mi

US $300
recharge and valve repair to fix A/C. required two trips and still not 100% 
109800 mi

US $150
Replaced battery 
149000 mi

US $50
Power jack replaced 
23000 mi Alternator needed replacing due to bad bearings 
31000 mi

US $100
A/C was causing a squeak when the A/C compressor cycled. Replaced A/C Clutch pressure plate per Mazda TSB. 
45000 mi I bought a rebuilt title and didn't realize that the air conditioning wasn't working. They had to replace all of the parts that are part of the air conditioning system. At the same time, they recommended I replace the radiator, which I did. 
65100 mi

C $100
Heater/AC blower fan stopped working, no air at all. 
7000 mi The cabin air blower only worked on the highest setting (4). Dealer replaced blower unit resistor. 

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2011 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed manual FWD

1820 mi horn not working (intermittently connected wire) 
12140 mi

C $1500
Also car would not read fuel level on dash. Had to remove rear seat to replace fuel level sensor. 
13020 mi Auxilary button was not functioning on stereo. Will get it repaired when bring in for next routine service. 
26000 mi

US $100
Battery dead 

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2011 Mazda Mazda3 4dr Hatch

167-horsepower 2.5L I4 6-speed manual FWD

6820 mi Battery was faulty, had a "bad cell" care would not start 
49000 mi

US $95
battery (stock) drain in cold weather. replaced battery 
12000 mi The driver side door lock actuator was making a squealing noise when activated, so it was replaced under warranty. 
50400 mi

US $14
Driver-side low-beam went out. Replaced it myself. 

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2011 Mazda Mazda3 4dr Hatch

167-horsepower 2.5L I4 5-speed shiftable automatic FWD

18000 mi Rattling from HVAC when fan is on. Dealer diagnosed as debris in fan housing 
53000 mi Noise from vents when blowing on high speeds Same as previous. Retried repair 
57000 mi

US $108
Same as prior visits - only went to a different dealer who was able to diagnose the issue and repair. 
69500 mi

C $1677
Initially replaced the alternator and belts. 
51000 mi

US $10
Headlight replacement 

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2011 Mazda Mazda3 4dr Hatch

148-horsepower 2.0L I4 5-speed shiftable automatic FWD

78120 mi

C $120
basic ac recharge 
8340 mi Horn stopped working replaced under warranty. 

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2010 Mazda MazdaSpeed3 4dr Hatch

turbocharged 263hp 2.3L I4 6-speed manual FWD

5000 mi Horn began working intermittently in October 2010. It failed completely in Novemeber, so I took the car to the dealer. They had to special order a replacement horn. 
6000 mi Faulty horn was replaced for free under original warranty. 
24000 mi Windows wouldn't lower when cold outside CD player started to skip on certain CD's Loud clicking noise when a/c is turned off from automatic mode 
6000 mi AM/FM radio stopped working. Dealer determined radio was bad. Dealer ordered a new radio and installed it under warranty. 
15500 mi Radio stopped working completly. 
48000 mi

US $75
Original battery was cranking slowly and tested as bad. Replaced with Interstate Battery. 
42000 mi Microphone for bluetooth was relocated so people could hear me better. It didn't help at all. It hasn't worked right since I bought it. Too much road noise I think. 
71000 mi

US $13
Recharged AC system with r134a 
77000 mi

US $150
Door latches were replaced as the sensor determining whether the door was open or closed stopped working. Leak in AC system needed diagnosis 
79000 mi

US $300
Leak in AC line between condenser and evaporator. 

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2010 Mazda Mazda3 4dr Sedan

167-horsepower 2.5L I4 6-speed manual FWD

34000 mi HVAC recirculate door actuator stripped causing clicking noise when deactivating recirculate mode. Dealer replaced actuator under warranty. 
15000 mi Driver door lock actuator making pre-fail noises. Actuator replaced under warranty. 
12000 mi Lock cylinder not cycling, when key removed beeped like key in and remote did not lock doors. 
On three or four occassions, I've removed my key (non smart key) and hear the warning chime that indicates I've left the key in. When I close the door and go use the remote to lock it, the doors don't lock. If I put the key in and cycle through... 

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2010 Mazda Mazda3 4dr Sedan

167-horsepower 2.5L I4 5-speed shiftable automatic FWD

10300 mi Trunk pops by itself and car battery dead. Happened twice in 2 months. Remotes were stored in drawer so not possible it opened by mistake. Dealer replaced battery. Unable to replicate since only happens every few weeks. Weird. 
40000 mi

US $3300
FAULTY SEALS OF HEADLIGHTS AND CONTROL UNITS OUT 4TH BATTERY REPLACEMENT 
51000 mi

US $440
hid bulb out 
51200 mi

US $1200
a/c compressor bolt broke 
35000 mi Bad Starter. Dragging, pulling down battery. 

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2010 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed shiftable automatic FWD

89000 mi

US $200
Alternator went out 
75000 mi

US $60
Fixed passenger side airbag light 
88000 mi

US $119
Battery replacement 
28300 mi

US $300
Chassis control unit failed. Dealer wanted $1,000+ to repair, I was granted a goodwill repair as the car was 6 months out of warranty and this was an unusual problem. 
20500 mi RF speaker was blown and replaced under warranty by dealer. 
28000 mi Front driver side door would not unlock. 
30100 mi Sensor which detects that the shifter is in Park was not properly detecting that signal, or transmitting it to the steering wheel lock. 
24800 mi Left rear Power Window would not operate. Replaced motor. 
95000 mi

US $300
right rear door lock stopped working. 
12000 mi

US $300
The fan on high-speed became very loud and had to be replaced. 
29340 mi Actuator faulty. Replaced successfully. 

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2010 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed manual FWD

65000 mi

US $90
hard to start car. Bought new battery and took into dealer. No problem found, but car is still hard to start sometime. 
95000 mi CD drive swallowed the disc and wouldn't eject it. Airbag sensor light is occasionally on, probably caused by a bad contact under the passenger's seat, whether the passenger is in the car or not. 
77000 mi

US $50
Replaced Horn. Duration - 10 minutes 
178000 mi

US $50
Mice or other rodents chewed wires for reverse lights switch 
62820 mi replaced blown speakers 
53391 mi

US $20
Headlight getting dim (not burned out). Replaced both with Sylvania H11 XtraVision bulbs. 
56200 mi

US $476
AC compressor died and needed replacing. 

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2010 Mazda Mazda3 4dr Hatch

167-horsepower 2.5L I4 6-speed manual FWD

86000 mi

US $100
OEM battery finally gave up. 
137020 mi

C $900
alternator failed. battery light goes on after driving. car shuts off on highway... 
9300 mi

C $170
Rear windows would not open. Apparently, a wire got disconnected from the switch in the driver's side door. Repair was done under warranty. Also did the 2 yrs maintenance including oil change, blake check, filters check... that one cost 170 
46000 mi

US $90
Blower making significant noise on higher settings and air flow reduced. Air filter clogged with wet leaves that had been sucked in. 
77000 mi Corrosion on battery terminals. 
79000 mi

US $255
Leaking battery, corrosion on terminals. 
81000 mi

US $1000
Sensor related to AFS headlight system is faulty. Parts alone run around $800 and attach to the suspension. Chose to live with it since it doesn't affect basic headlight functionality. 
24800 mi BlueTooth system faulty, rest of audio system works perfect. Mazda has bulletin/recall (some models) out about this problem on particular model/year. 
88400 mi

US $900
Replaced defective battery 
67200 mi

US $120
Replaced battery 

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2010 Mazda Mazda3 4dr Hatch

167-horsepower 2.5L I4 5-speed shiftable automatic FWD

8800 mi CD Player / 6CD changer stopped working. Got it replaced within warranty. 
17360 mi Passenger's Seat airbag not functioning warning light came on when passenger was sitting in that seat. Recalibrated. 
30660 mi Passenger seat sensor doesn't come on when 105 lb wife sits in it, thus deactivating airbag. Dealer could not replicate the problem, which has been intermittent for 2+ years. 
1000 mi bad horn would not function, was replaced 
87000 mi

US $46
Replace antenna rod 
29000 mi

US $75
Battery died and couldn't hold a charge 
42700 mi

US $1300
My headlight ballasts needed to be replaced. My headlights stopped working. The ballasts were pulling charge from the battery even when the car was off. 
61000 mi

US $1300
HID bulb and ballast needed to be replaced 
5660 mi alarm system was going off remotely by itself. 
19840 mi Front passenger speaker replaced. 
17460 mi

C $750
Battery died. Replaced by the dealer for a new (better) part. 
24500 mi

US $300
Master window switch to make rear driver's side window go up broken. 
18000 mi Door lock module replaced for the passenger side rear and now the passenger side front is also making noise when it locks. 
18200 mi Door lock module replaced for the passenger side FRONT door. 
107000 mi

US $600
Recharged empty tank and then replaced condenser 
16000 mi Plug got stuck in the Cigarette lighter. Was a known defect, with TSB. Was replaced. 
39000 mi

US $500
Electric lock on drivers side had to be repaired. The actuator was replaced. 
49000 mi

US $230
Horn stopped working. 
53400 mi Battery failing. Replaced battery. 
63000 mi

US $800
Clutch disappeared from compressor and fell on the road somewhere 
39000 mi battery needed replacement - would not start in cold 

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2009 Mazda MazdaSpeed3 4dr Hatch

turbocharged 263hp 2.3L I4 6-speed manual FWD

25000 mi Air Conditioner Vent has been making noise as if something was stuck in it. Mechanics found a piece of paper stuck in the vent that was creating noise by fluttering in air movement created by the Air Conditioner. 
120000 mi

US $90
A plastic clasp on the A/C drain broke which caused the drain to leak into the passenger's foot area. 
129000 mi

US $215
Something shorted in the Air Conditioning system. Had to get it replaced. 
63000 mi Tire Pressure Sensor Failed in Driver Side Front Tire. Dealer diagnosed, replaced, and damaged my 18 inch stock alloy wheels during tire dismount and remount. 
98000 mi

US $20
Remove and clean driver side window switch. 
103000 mi

US $11
Add grounding wire for windshield motor. 
18000 mi TSB regarding windshield wiper motor replacement - done same day as damper replacement. 
540 mi Defective Rain Sensor causing RF interference with Tire Pressure Monitoring System Intermittent fault on Tire Pressure Monitoring System (TPMS). Traced to Radio Frequency Interference from Rain Sensor. Rain Sensor module replaced under warranty. Appears to have resolved issue. Vehicle in shop 2 days. 
28000 mi Tire Pressure Monitor (TPMS) light comes on intermittently in cold weather. Pressures are fine on all tires inc spare. Told my radar detector was interfering. Removed and disconnected, still a problem; contacting dealer to reattempt fix. 
29000 mi Previous unsuccessful repair to TPMS system reattempted. Dealer ordered a new 'TPMS module' (apparently combined with the rain sensor by the rear view mirror) and fitted. Seems to have worked. 
56000 mi

US $555
Starter motor failed. Possibly due to carwash. Car started upon exiting carwash, 30 minutes kater at home, did not. Had to be flatbedded to garage. 
34000 mi

US $95
30,000 mile service by dealer, minus all the stuff I take care of locally. LR windows switch broken. Cabin air filter replaced, brake pads measured. 
75000 mi The turn signal function is INSIDE the ECU for this car. I believe that the problem is due to a bad ground somewhere as the only time I lose occasional ignition is when the turn signal is flashing and other loads happening (or so it seems). I added more grounding wire to hopefully eradicate the issue as I believe it's due to an intermittent bad ground state. Also reconnected the ECU to see if dirt / capacitance build up may be an issue. The turn signal flasher (controlled by ECU main computer) is what causes the ignition grounding most times. I am still guessing, but hopeful it's "just a bad ground" and not the ECU itself. Intermittent and the ignition comes back on quickly in just ONE time at the beginning of the first flash... After that it doesn't do the ignition shut-off more than once and the car recovers quickly, even at-speed. Very little momentum loss just a "flicker" like a reset. 

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2009 Mazda Mazda3 4dr Sedan

156-horsepower 2.3L I4 5-speed shiftable automatic FWD

34100 mi

C $155
Ambient temperature display was displaying outside temperature ~20-25 degrees too high. Ambient temperature sensor was replaced. 

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2009 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed manual FWD

45000 mi

US $70
Intermittent starter failure due to a corroded connection. There is a TSB from MAZDA out on this. Repair is simple - a new wire and connector with protection against corrosion. All is fine with no repeat of failure in 3 weeks after repair 
91000 mi

US $70
Headlights replaced. 
52080 mi

C $25
Drivers side low beam headlight bulb burned out. Was replaced with a new H7 bulb. 
63860 mi

C $20
Passenger side low beam headlight bulb burned out. Replaced. 
60000 mi

US $110
replace battery 
88000 mi

US $800
Replace AC compressor 
96000 mi

US $100
headlight replaced 

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2009 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 4-speed shiftable automatic FWD

5000 mi "Snapping" sound coming from center of dashboard along with poor radio reception. Dealer replaced audio headunit. 
32000 mi Once fog lights were activated with low beam headlamps, they would stay on regardless of fog light switch position or high beam operation. Replaced fog light relay under warrantee. 
23000 mi Battery needed replacing 
53000 mi

US $100
Replaced battery 

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2009 Mazda Mazda3 4dr Hatch

156-horsepower 2.3L I4 5-speed shiftable automatic FWD

27000 mi Interior light in cargo area inoperable due to poor ground connection. Replaced ground connector. 
30000 mi

US $253
Battery cables loose at starter. 
123400 mi

US $200
Replaced AC clutch with aftermarket part as Mazda does not sell the clutch separate from the compressor 
63000 mi

US $100
Tire pressure sensor replacement. 
102000 mi

US $1000
Compressor seized 
74000 mi

US $20
The hex nuts affixing TPMS units to the tires corroded, cracked and split, causing flat tire on interstate. Since no replacements available, I had shop remove the TPMS and put in a regular valve stem. 

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2009 Mazda Mazda3 4dr Hatch

156-horsepower 2.3L I4 5-speed manual FWD

167400 mi

C $1300
One HID headlight was not working. The ballast and igniter were dead and the lightbulb was replaced (though still working). Total cost was over $600 for the headlight repair. 
142000 mi

US $1048
Power window switch was bad and was replaced. Power window switch was bad and was replaced. 
178000 mi

US $1200
Original horn died. Replaced with aftermarket part. 

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2008.5 Mazda MazdaSpeed3 4dr Hatch

turbocharged 263hp 2.3L I4 6-speed manual FWD

45440 mi

C $93
Blower speed drops after prolonged AC use during extreme heat; blower speed returns after cycling AC on and off. Diagnosis began, but problem was not determined and was not solved. 
1248 mi Radio Replaced under warranty BEFORE TSB was issued. 
23000 mi

US $50
Battery died. Replacement battery purchased @ Costco and installed by myself at home. Old battery was returned to Costco for core deposit refund. 
50000 mi This car was in the shop repeatedly for a malfunctioning TPMS system. It had sensors replaced multiple times including the entire TPMS system. It also had repair work done on the turbo (documented problem in other turbos). Also recall fixed 
95700 mi Neutral Safety switch CEL, dealer said switch was bad and wanted $250 for replacement. I chose not to oblige.  Found the issue myself - true root cause was a severed ground wire @ the switch. Soldered together, solved CEL. DEALER = CROOK. 
3000 mi Bass drop-out at high volume. TSB issued for replacement/software upgrade. 
14000 mi Noticed the A/C wasn't cooling. Fuses and relays all intact. Compressor not turning as it should. 
21300 mi AC blower motor malfunction. Replaced under warranty. 

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2008.5 Mazda Mazda3 4dr Sedan

156-horsepower 2.3L I4 5-speed manual FWD

5000 mi Stereo Bass cutting out over level 34, like this since new.  
84700 mi To date, not fixed. Currently quoted 1,200 for A/C compressor replacement. 
88000 mi

US $1100
AC never fixed. 

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2008.5 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed manual FWD

12000 mi bass would cut out at certain speeds 

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2008.5 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 4-speed shiftable automatic FWD

120100 mi Starter replaced and wires replaced. 
1000 mi Simple volume/amplifier problem with the stereo above volume level 35. Known problem, had to order new audio unit. 
1000 mi Replaced stereo unit due to small amplifier defect affecting volume levels at lvl 35 and up. 

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2008.5 Mazda Mazda3 4dr Hatch

156-horsepower 2.3L I4 5-speed shiftable automatic FWD

3000 mi Radio issue, bass falling out around volume 34/35 Replaced radio unit. 
21700 mi Airbag light came on. They checked it out, ordered parts. Installed previously ordered airbag part. 
70060 mi

C $200
Driver window winder stopped working. 
40000 mi Car would require jump start intermittently. Thought was related to previous recall - power steering. Took to dealer - found it was alternator. Replaced under Mazda Extended Care warranty. 
52000 mi "Refix" of stalling, no start problem from before. Another power distribution/computer part. Covered by Ext. Warranty. Approx $2000.00 of repairs plus rental car coverage. "Should be fixed now" - we'll see. 
172000 mi

US $300
AC compressor inoperable. Harness had failed. 
181000 mi

US $275
Replaced high pressure hose 
197700 mi

US $140
AC Compressor Relay replaced. 
32000 mi TPMS sensor warning - low tire pressure; checked and found Right-Rear low by ~10PSI. Dealer Service replaced faulty TPMS sensor and O-ring(s) under warranty. 
32500 mi TPMS sensor warning - low pressure; checked and found Right-Rear tire was low by ~10PSI AGAIN. Dealer Service replaced TPMS sensor and O-rings AGAIN. 
34000 mi TPMS sensor warning - low pressure; checked and found Right-Rear tire was low by ~10PSI YET AGAIN. Dealer Service replaced TPMS sensor and O-rings YET AGAIN. Repaired? Maybe 3rd time's a charm. 
53000 mi reported bass drop at 34/35 on radio. Original dealer delivered car when new even though this radio/changer was on recall. Just a quirk now. Not interested in repairing. Also, light on cig lighter fails at times. part not in stock. 

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2008.5 Mazda Mazda3 4dr Hatch

156-horsepower 2.3L I4 5-speed manual FWD

1000 mi Stereo not functioning correctly - bass would cut out at higher volumes. Stereo issue. Stereo installed 
8000 mi Starter motor failed - car wouldn't start in cold weather. 
2000 mi Radio exhibited random variation in bass tones. Logic unit was on recall, but selling dealer did not check unit prior to sale. 

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2008 Mazda MazdaSpeed3 4dr Hatch

turbocharged 263hp 2.3L I4 6-speed manual FWD

15000 mi Installed new CD player ordered at 5/11/2009 service appointment. 
16634 mi belt tensoiner 
32000 mi Cd player stopped reading and ejecting CD's 
46000 mi Three of the TPMS sensors went bad and were replaced. 
156000 mi

US $500
Replaced AC compressor 
17000 mi Head unit replacement for volume issue. Head unit replaced due to volume issue 
126200 mi

US $1200
Compressor seized. 
8000 mi Broken Stability Control button 

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2008 Mazda Mazda3 4dr Sedan

156-horsepower 2.3L I4 5-speed shiftable automatic FWD

120000 mi

US $50
Wire running to compressor had broken. Easy fix. 
64000 mi

US $140
Alternator dead 
126666 mi

C $110
Power not reaching AC pump/compressor. Installed aftermarket AC clutch kit. 

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2008 Mazda Mazda3 4dr Sedan

156-horsepower 2.3L I4 5-speed manual FWD

89000 mi

US $1100
Needed new alternator 
60000 mi

US $225
6 Disc dash-mounted changer repaired, would not accept discs 

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2008 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed manual FWD

45000 mi

US $832
AC Compressor no longer working. had to be replaced. $832 repair 
87000 mi

US $1300
Compressor went out. Had to replace the whole system except for the hoses. 
104000 mi

US $80
A/C Compressor was making bad noises and had to be replaced AGAIN. 
93000 mi

US $80
Car exhibited intermittent starting problems. Solved with battery replacement even though battery tested "good". 
102700 mi

US $1000
A/C stopped working. Determined to be the compressor. Compressor and accumulator replaced and system purged/recharged. 
183520 mi

$120
changed out the battery 
13640 mi Speedometer needle stopped working. Dealership changed the whole cluster under warranty 
15500 mi Speedometer stop functioning. Everything else is fine. Dealer never seen this problem before. New part ordered, but not able to make it work. New appointment scheduled. 
16120 mi Speedometer working. New installation procedure used. 1 hour work. Everything fine. 
24180 mi Air conditionner Condenser in front of the Radiator. Honeycomb was failing appart, but no refrigerant leaks. 
49200 mi

US $1000
AC Compressor locked up. It and drier needed replaced. 
40000 mi

US $900
Compressor locked up. Had to replace compressor and drier, evacuate system. This is the SECOND time for an OEM compressor failure with this car. (First was at 46k) 
55000 mi

US $400
Driver's side door lock was sticking and could be unlocked either with unlock button or remote key fob, but not both 
59000 mi

US $450
Front passenger door lock actuator was malfunctioning and was replaced 
65900 mi

US $40
Low beam headlight bulb was out and was replaced 
7000 mi CD player often got stuck when ejecting disc. Dealer realigned radio faceplate, as per factory TSB. Still has problem but not as often as before. 
53700 mi

US $1100
replace ac compressor 
87000 mi

US $120
windshield wiper motor not working, at dealer cost $120 to diagnose problem, price of $450 to replace motor, decide not to replace 
16000 mi Partial loss of AC coolant. No leak detected. Recharged. Also, "Check Engine" light on again. Same problem as earlier-fuel line pressure indicating loose filler cap, but not possible. Suspect bad cap, dealer reset light, no cap replace until happens again 

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2008 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 4-speed shiftable automatic FWD

93000 mi

US $60
Driver window motor died. Replaced myself. 
29000 mi A/C blower bad. Replaced. 
69420 mi driver window motor is not responding accurately 
129000 mi

US $190
Master power window switch and power mirror switch were failing. Replaced both switches 
62000 mi Driver side side power door lock stopped working. Air conditioning compressor broke. Would have cost $1,600 to fix. 
34000 mi Front passenger door speaker went out intermittedly when MP3 player was activated. Mechanic had to replace a faulty wire 
38000 mi Wire in speaker malfunctioned again. Dealer not sure why. Changed all wires on passenger side door leading up to radio. 
61700 mi 4th time dual tire pressure sensors malfunctioned and had to be replaced. 
51800 mi

US $250
5th time we had to have a tire sensor replaced and no one can tell us why this keeps happening. We drove the car less this quarter. 
60000 mi AC intermittently does not function. Dealer could not replicate. 
67000 mi

US $100
AC Compressor failure due to missing bolt. 
47500 mi Driver's door will not lock with remote. Unlocks ok 
50000 mi

US $200
replaced both front door lock actuators 
54000 mi

US $100
replace battery 
10000 mi Replaced Failed Alternator 
49700 mi The front-right speaker has developed a very obnoxious rattle. I never play my car stereo loudly, and have always taken care not to abuse it. An annoyance I wouldn't expect so soon in this car's life. 
59000 mi The speaker rattle was never fixed. It was annoying, but never critical enough to motivate a fix. 
68000 mi LEFT SIDE HEADLIGHT 
94000 mi

US $85
A/C recharged, cooled for a few days. Further diagnosis and repairs will be needed. 
115000 mi A/C never fixed. 
115000 mi

US $350
replaced leaking a/c high pressure line 
102000 mi

US $40
Headlight went out. 
32000 mi The air pressure sensor in one of the tires also needed to be replaced. 

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2008 Mazda Mazda3 4dr Hatch

156-horsepower 2.3L I4 5-speed shiftable automatic FWD

37000 mi AC would run cold then warm on and off during extreme hot and humid day. Vehicle driveable with no other problem. Dealer spent most of the afternoon diagnosing and replacing the air conditioner thermostat controller, no charge for service. 
67200 mi Tire Sensor on tire # 4 and tire # 2 failed. Replaced by Mazda Full Warranty. 
49000 mi

US $135
Battery suddenly went dead. Replaced small OEM Panasonic battery with a larger Interstate Megatron battery. 
80000 mi A/C only blowing slightly cool air. Refrigerant recharge. 
9000 mi Steering wheel air bag failure. Steering wheel air bag module replaced. Had high resistance measurement. 
34000 mi One of the ignition keys stopped being able to start the car. A new key was ordered and needs to be "programmed". 
35000 mi The faulty key was replaced. 
4000 mi Front left windshield wiper stopped working; replaced. Rear wiper motor stopped working; replaced. 
10000 mi Horn was going off, as though an alarm had been set off. Manufacturer/dealer replaced module. Problem persisted. I figured out that remote was sending a bad signal causing the panic button alarm to activate. Remote replaced by dealer. Problem solved. 
14880 mi Ticking noise while idling on cold start. Replaced AC compressor. 

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2008 Mazda Mazda3 4dr Hatch

156-horsepower 2.3L I4 5-speed manual FWD

38200 mi Dealer admitted that battery was not correctly connected by them after the clutch repair.Result was shorting out the electrical items in the car. Damage sustained to the battery and connectors. Dealer states wiring harness was not damaged. 
75300 mi

US $19
Changed original headlight bulb 
97000 mi

US $20
Passenger side brake light and socket burned out 
110500 mi

US $129
DEAD BATTERY ALMOST 3 YEARS TO THE DAY. ALSO REPLACED BY AAA. MY MECHANIC TELLS ME THAT THEIR BATTERIES DON'T LAST AS LONG AS INTERSTATE BRAND 
45000 mi

US $182
Replace battery and clean terminals 
54500 mi

US $70
Replaced drivers side low beam headlight bulb 
72000 mi

US $150
9V plug in dashboard needed replacement. 
82600 mi

US $70
Left Headlight low beam bulb replaced 
86000 mi

US $1700
AC failed while driving. Compressor and belts required replacement. 
69000 mi

US $1000
Replaced A/C compressor. 
57000 mi

US $500
replaced a/c compressor and clutch. replaced a/c compressor and clutch. 
32000 mi

US $90
Bad battery 
36000 mi Auto-dim mirror intermittently fails to automatically dim. Auto dim mirror was replaced. New mirror does not have any problems. 
12400 mi

C $222
Sunroof not sitting flush when closed. Did not leak. Just cosmetic. Noticed at delivery, not repaired because I forgot about it. Aways after service I would remember. 
32240 mi Vehicle in for service, tech noted that block heater was leaking around seal, replaced free of charge under warranty 

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2008 Mazda Mazda3 4dr Hatch

148-horsepower 2.0L I4 5-speed manual FWD

112000 mi

US $20
Headlight went out 
118000 mi

US $18
Low beam headlight went out again 
143000 mi

US $18
Headlight out again 

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2007 Mazda MazdaSpeed3 4dr Hatch

turbocharged 263hp 2.3L I4 6-speed manual FWD

72500 mi Air was not always cool, sometimes not, sometimes cool. Compressor replaced. Bearings were going out. Also some peripheral bits were replaced. 
95000 mi

US $100
Driver door window switch failure. Quick fix ten minutes. Extended warranty covered but I paid deductible 
99000 mi

US $400
Driver side window switch failed 
64000 mi

US $600
Sirius Satellite Radio Read: Antenna Fail. Never fixed it. Never worked right... Common problem with MazdaSpeed3's 
43000 mi The trunk light in the rear failed to turn on/off with opening/closing of the hatch. 
43000 mi

US $22
The trunk light in the rear failed to turn on/off with opening/closing of the hatch. 
27500 mi

US $20
The trunk light was fixed successfully on the third attempt, mostly because the first two shops simply didn't want to be bothered with it, and the third shop was run by an old-school mechanic who wasn't afraid to tackle repairs. 
52000 mi Driver's-side front window regulator wore out, and was replaced. 
53300 mi

US $25
Rear brake light bulb socket wore out, and was replaced. 
40000 mi

US $250
Drivers window switch failed. 
35500 mi Tire pressure sensor has malfunctioned. The shop couldn't fix the problem and I was unwilling to check all 4 tires for a faulty sensor, so I left until I get to a dealer. 
63000 mi

US $80
Battery was low (after 8 years), so replaced it. 
84000 mi

US $10
Navigation/radio restarted several (10+) times during a 10 mile drive. Wasn't particularly cold or wet, but cleaned battery connections and problem seemed to resolve. 
96000 mi

US $30
AC running warm, required recharging. Used aftermarket kit. 
51340 mi

C $50
Rear window wiper motor has stopped working. 
52080 mi

C $50
Installed the previously ordered rear window wiper motor. 
120000 mi

US $600
AC compressor clutch bearing failed while driving. Replaced pulley and bearing. 
80200 mi Starting battery was weak - cranked slowly after sitting for a few days. Replaced with Optima Red Top. 

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2007 Mazda Mazda3

Engine not specified

83080 mi

C $1000
compressor died 

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2007 Mazda Mazda3 4dr Sedan

156-horsepower 2.3L I4 5-speed shiftable automatic FWD

257000 mi

US $120
The AC compressor clutch stopped working. The coil was bad and was replaced along with the pulley and a new AC relay switch 
76000 mi A/C compressor replaced 
90200 mi

C $387
A/C blowing warm air, after the compressor was completely changed 2 years ago. The system was recharged and dye was applied to future leak detection. 
58000 mi vehicle alarm was setting itself off randomly. Inspected and cleaned the reed switch that monitors if the hood is closed. 
130000 mi

US $450
fuel sending unit 
46000 mi CDs stuck in the 6 CD changer 
102000 mi Never fixed CD changer. Tried to get it out myself at one point, but couldn't figure out how. Told it's a common problem. 
93000 mi

US $375
Hose clamp above alternator allowed antifreeze to leak onto alternator. Alternator failed. 

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2007 Mazda Mazda3 4dr Sedan

156-horsepower 2.3L I4 5-speed manual FWD

16000 mi CD Changer stopped working. 
200 mi Air bag light came on--bad sensor chip replaced. 
80010 mi

US $950
Replace A/C compressor and condenser 
88040 mi

C $1000
Blown compressor 

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2007 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed manual FWD

138000 mi

US $396
Car would not start, intermittently. Starter, alternator, and battery all tested OK, but I ultimately decided to have the starter replaced, which appears to have solved the issue. 
170000 mi

US $43
Replaced headlight bulbs; cleaned and tightened up connections. 
81600 mi air conditioner motor went out. My warranty covered the repair cost. 
95000 mi

US $30
Both low-beam headlights quit working in the same week -- replaced both. 
148000 mi

US $20
replaced headlights after one burned out 
229000 mi

US $800
Replace compressor because of compressor clutch failure 

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2007 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 4-speed shiftable automatic FWD

35000 mi

US $150
Engine light on. 02 sensor replaced under warranty. 
51340 mi

C $15
My tail-light went out so I had to change it. 
78425 mi

US $112
Replace D/S Front Door lock motor - BAN759310B 
40000 mi

US $680
replaced dead alternator and bad battery 
129000 mi

US $400
Doesn’t go up -all the way- motor stops- replaced cable and motor 
66000 mi

US $905
Needed new compressor, condensor, expansion valve, drier, and new ac flush and fill. Whole system went down. Bought parts from rock auto and chopped $700 from the repair price. Still hurts...Prius here I come again! 
31000 mi

C $118
Problem with wire to starter motor. This had to be replaced. 
14000 mi Replacement airbag control module (covered under warranty) 

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2007 Mazda Mazda3 4dr Hatch

156-horsepower 2.3L I4 5-speed shiftable automatic FWD

59300 mi

US $150
dead battery.. would not turn out in cold, kept losing charge.. probably the original battery's life was up 
130000 mi

US $50
battery failed to start car - cold weather replaced with new battery 
41120 mi

C $300
Passenger power door locks no longer engage. 
57000 mi

US $300
Alternator putting out 0 voltage. Replaced along with accessory belts. 
126480 mi

C $210
Needed new battery. 
96000 mi

US $15
Dash Lighter socket intermittent. Keeps blowing fuse. Loose, goes on/off with just a bump in road. Have to keep wiggling phone charger to find right spot to stay on. Replaced lighter socket. 
7440 mi Airbag light was on when I got the car. Dealer needed to order an "airbag module". Was installed in return visit in March. 
9920 mi Needed a new "airbag module" (not sure if this counts as electronics or not). Air bag warning light was on when I got the car but I didn't notice it until I'd been driving it a few days (I actually thought it was supposed to be on until I read the manual 
79360 mi Electrical? Light & rain sensor on windshield that turns on headlights when it gets dark & controls intermittent wipers failed permanently. This meant no intermittent wipers and had to be careful not to turn the headlight switch to automatic. 
13640 mi KEY FOB BROKE - Ordered a replacement. REPLACEMENT KEY FOB WOULD NOT PROGRAM ORDERED PART - INSTALLED - KEY FOB STILL WONT PROGRAM REPLACED UNIT - BOTH KEY FOBS WORK.  BUT NO ALARM NOISE NOW - DEALER WILL CALL WHEN THEY HAVE FIGURED IT OUT. DEALER REPLACED LCD SCREEN ABOVE STEREO AGAIN. THIS IS LCD SCREEN 3 NOW IN TWO MONTHS. 
159000 mi

US $1100
Alternator failed while car was on highway. Had to get towed, and get alternator replaced 
142000 mi AC stopped blowing cold. Found center bolt for AC compressor/clutch pulley had backed out, causing clutch to fall off and land on splash shield. Reinstalled bolt with loctite and AC works again. 
175000 mi

US $50
AC Compressor began making noise when on, and after a while the system stopped blowing cold altogether. Attempts to install additional freon were unsuccessful. Discovered a faulty schrader valve on the low side recharging port and replaced part. System now holds vacuum. Recharged with freon and compressor oil. System now operating normally again, blowing cold air, and compressor is no longer noisy. 

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2007 Mazda Mazda3 4dr Hatch

156-horsepower 2.3L I4 5-speed manual FWD

75000 mi

US $225
Intermittent starting issue, fixed by TSB. 
82000 mi

US $1200
Replaced A/C Compressor 
2480 mi Noticed there was almost no cold air blowing with A/C on when I was not running over approximatly 80km/h. Dealer said everything was alright at this was usual with Mazda3. I still consider there's a problem and I will be considering a change of dealer. 
54800 mi

US $20
Left headlight burnt out. Tried changing bulbs myself but my hand was having none of it. Brought to local auto parts store and they had both headlight bulbs changed out within 20 minutes. They used two techs to do it. $20 well spent. 
35 mi Automatic wiper system was interfering with the tire pressure monitor, causing the TPM light to come on. A new control module was installed. No problems since. 
97000 mi

US $900
A/C compressor bearings failed. Replaced compressor 
118700 mi

C $75
replaced noisy heater blower. 
137020 mi

C $110
After sitting unused for 10 days car would not start. Battery was completely dead. Battery was original AFAIK, so decided to replace it. 
158100 mi

C $100
AC had stopped working, so had it inspected. The shop found that the compressor clutch was NFG. Estimated repair cost was about $1500. They said clutch parts not available, and/or it was too labour intensive to repair so, recommended installing a reman compressor. I since learned that clutch parts (eg the coil) are readily available, cheap, and easy to install. I will replace the coil and see if that fixes it. If not I'll likely retire the car before next summer. 
19000 mi All six CDs got stuck in the changer - wouldn't play, eject, etc. Display said "Check CD". Broken CD changer replaced. 

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2006.5 Mazda Mazda3 4dr Hatch

turbocharged 263hp 2.3L I4 6-speed manual FWD

11780 mi Auxiliary port for audio head unit picks up engine ignition interference if cigarette lighter adapter is used to charge iPod connected to the aux port. 
13020 mi Dealer instructed by factory to install iPod connectivity parts to solve problem, but did not agree to cover under warranty. Rejected costly repair and will follow-up with complaint letter to factory. 
13020 mi Living with problem. However, dealer has offered a "deal": if the owner purchases a routine maintenance plan, the requisite iPod connectivity components will be installed at no extra cost. 

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2006 Mazda Mazda3

Engine not specified

75000 mi

US $260
starter out 

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2006 Mazda Mazda3 4dr Sedan

160-horsepower 2.3L I4 5-speed shiftable automatic FWD

93500 mi Alternator died 101000 miles 
85000 mi

US $1000
Clock is drifting Air conditioning & fan Panel switch is failing. Airbag failure warning light comes on when starting the car and driving. Mechanic said it is potentially caused by driver side airbag sensor failing. Advised to have dealer confirm and repair as it is an expensive part. 
49000 mi

US $222
Clock jumps back in time ocassionally. Clock was replaced. There is a TSB on this. 
49300 mi Clock jumping time worse now. Clock replaced again. 
63240 mi

C $360
Bad alternator - replaced with a refurbished one. 
80600 mi

C $375
Alternator had to be replaced again (and again with a refurbished one). Replaced the Serpentine belt as well, though it wasn't in a bad shape 
13000 mi clock not keeping accurate time. 
12000 mi Clock not keeping accurate time. 
37000 mi

US $500
Replaced Alternator 
250 mi Dealer replaced all 4 Wheels and Tires, 4 Tire Pressure Sensors, TPMS receiver and EMC to remedy TPMS light that would not go off. 
100000 mi

US $688
Briefly lost power. Warning light came on. Drove to dealer. Alternator replaced. 
35000 mi Fan module defective. 
53000 mi

US $35
driver side head lamp, shifter area light 
50000 mi

US $28
headlight 
107000 mi

US $700
Bad Alternator 

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2006 Mazda Mazda3 4dr Sedan

160-horsepower 2.3L I4 5-speed manual FWD

15000 mi In dash CD changer was jammed, would not play, eject, etc. In dash CD changer replaced at no cost under warranty. 
66000 mi

US $72
Turn signal switch was not returning to center after turn completed; replaced turn signal switch/stalk assembly. 
52000 mi

US $375
A/C compressor replaced. The car was out of warranty but the dealer decided to cover part costs while I had to pay $375 plus tax for labor. 
19220 mi Glove box light worked itself loose. Requires some disassembly of dash to repair. Covered under warranty. 
48360 mi The reinforced locking plate installed by the dealership last year (part of an anti-theft recall in the Victoria/Vancouver BC area) somehow worked loose and interfered with the window - would not roll down. Replaced by dealer at their cost. 
77000 mi

US $40
A/C stopped working last fall, so I bought a gauge, checked system pressure, and charged with 2 bottles of R134a. Blows cold now and cycles at a normal rate. 
23000 mi The LCD display and the light on the stereo/radio/clock had failed, and the unit had to be replaced. 
48000 mi

US $40
Needed a new heat-a/c control panel. The air conditioning would periodically just turn itself off. Part was $640 from dealer, found a used one on Ebay for $40. The dealer agreed to install it for me free of charge (about 1/2 hour of labor).  

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2006 Mazda Mazda3 4dr Sedan

150-horsepower 2.0L I4 5-speed manual FWD

33000 mi Replaced standard CD player under warranty. Radio still worked but refused to read CDs 
61700 mi

US $25
Both headlights burned out within one week of each other. Replacement is moderately challenging and took approx 1 hour. No issues since then. 
48360 mi Resistors for fan stopped working; fan only worked in maximum speed; replaced under warranty 
47740 mi

C $20
Passenger side low beam replaced 

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2006 Mazda Mazda3 4dr Sedan

150-horsepower 2.0L I4 4-speed shiftable automatic FWD

59000 mi

US $492
Driver side window would not roll up - replaced window motor and regulator assembly. Also diagnosed driver side rear window noise but did not repair. 

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2006 Mazda Mazda3 4dr Hatch

160-horsepower 2.3L I4 5-speed shiftable automatic FWD

16120 mi Replaced rear drivers side seatbelt, latch sticking. Done under warranty 
40300 mi replace drivers side headlight bulb 
184000 mi

US $191
Replace bad TPMS sensor(s). 
156000 mi

US $200
Replaced A/C compressor clutch and bearing. Bearing had been exhibiting symptoms of grinding for a few years, so I'd been pushing my luck delaying replacement. 
186000 mi

US $20
Replaced the cabin air filters. 
56420 mi

C $300
Alternator wouldn't charge battery; replaced alternator. 
89280 mi

C $275
Alternator and Battery replaced 
115000 mi Electrical system becoming erratic; alternator needed to be replaced. 

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2006 Mazda Mazda3 4dr Hatch

160-horsepower 2.3L I4 5-speed manual FWD

81200 mi

US $34
Both low-beam halogen bulbs burned out. Right-side around December 2010, Left-side around February 2011. Bought and changed myself, $17 each bulb. 
101000 mi

US $20
Both low-beam halogen bulbs died, a week or so apart. These were already replacements, the first pair (original from Mazda) lasted about 80,000 miles. The two I replaced, from Sylvania, barely lasted 20,000 miles... Kudos to Mazda!!! 
153000 mi

US $78
Windshield Washer pump died. Replaced by a local shop. 
4700 mi Sometimes after turning the key to acc then off, the clock would show incorrect time. They had to change a module. Replaced clock module and clips 
120000 mi

US $1500
alternator replacement 
104000 mi

US $65
Corrosion in positive cable to starter caused intermittent no-crank/no-start issue. Connector on cable re-soldered. 
26000 mi CD changer jammed. Deck was replaced. 
81700 mi

US $1306
A/C compressor seized, causing belt to melt and break. Replaced A/C compressor (with new part), expansion valve, receiver drier, and belt; evacuated, flushed, and recharged system. 
117000 mi

US $180
Battery failed, replaced with aftermarket replacement. 
87420 mi

C $300
Replaced alternator and 2 belts 
75000 mi Stuck CD changer w/many CD's lost to the player. 
89700 mi

US $100
CD changer inoperable. Not able to retrieve cd's 
5000 mi Dealer had to replace factory battery because it was very low. Dealer stated that it had happened to a few other people before. 
44000 mi

US $42
Replaced headlight bulbs 
88800 mi

US $650
Left my car at the airport for a week, and then it was dead when I arrived. The alternator was not charging the battery so it had to be changed. 
124800 mi

US $7
Driver window would go down partially and made a crunching sound. Ordered a gear for the motor assembly ($7) and replaced myself. 
119040 mi Complete AC failure. 
118760 mi Dead alternator, failing battery 
12500 mi Two minor warranty issues- 1- Clock was losing time intermittently, dealer was already aware of problem and fixed within an hour. 2- In very hot weather, the manual shifter knob became very loose. Dealer applied different adhesive and fixed within a 
72000 mi

US $650
A/C stopped working suddenly and I heard a horrible screeching noise from under the hood. A/C compressor had seized causing belt to break.  
77300 mi

US $1050
Replaced A/C compressor with a used one from a salvage vehicle. 

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2006 Mazda Mazda3 4-door

4-cylinder automatic 2WD

34100 mi Replaced faulty folding side mirrors 
57660 mi

$350
alternator not working 
140120 mi

$600
alternator down. changed parts 
94000 mi

US $450
a/c went out 
124700 mi

US $250
starter failed 

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2005 Mazda Mazda3 4dr Sedan

160-horsepower 2.3L I4 5-speed manual FWD

40000 mi

US $50
AC taken in for stopping working. Took to garage for a diagnostic on the AC system and was informed of a failure by the compressor. Personally recharged AC system and no problem since. Beware of auto garages. 
60000 mi AC compressor failure. 
38000 mi

US $200
The turn signal switch had to be replaced; it was no longer self-canceling after a turn. 
44000 mi Navigation screen made clicking noise when opening- replaced after parts ordered- waited one week or so 
46000 mi Clock lost 12 minutes overnight. Dealer ordered new clock display + computer. Common problem with Mazda3 Navi screen occasionally will not turn on in a timely manner. Usually in cold weather. Dealer could not replicate as screen turned on immediately. Will try again when ordered parts come in-seems that screen has to be off for a few days to cause problem. 
48000 mi airbag light came on- problem with main computer. Computer replaced. 
74000 mi AC kept turning off on fan speed 2. replaced master control Auto down feature for drivers window not working in hot weather. Switch cluster replaced. Multiple dashboard lights no longer functional after replacing master climate control cluster. Dealer replaced bulbs and ordered new seat heater switches. Unknown at this time whether dealer or extended warranty will pay for repair. 
75000 mi

US $278
Dealer replaced burned out seat heater switches and light bulbs ordered on previous visit. I suspect battery was not disconnected during prev repair and this caused burnouts. Extended warranty paid all except for $50, and dealer covered that. 
26000 mi

US $50
Window regulators would stick, recognized by Mazda. Regulators were oiled. (MK) 
57900 mi

US $1040
A/C compressor burnt out and needed to be completely replaced. The part is VERY pricey. 

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2005 Mazda Mazda3 4dr Sedan

160-horsepower 2.3L I4 4-speed shiftable automatic FWD

25000 mi Replaced faulty driver's side window switch. 
92265 mi

US $1600
Air conditioning compressor failed, taking out every other component along the way (condenser, evaporator, expansion valve, etc.). All components replaced, flushed, and recharged. Enter A/C system replaced (compressor, condensor, evaporator, etc.) 
119000 mi

US $140
A/C pressure switch was replaced. 
71000 mi

US $350
My lights and other electrical accessories were turning off and the battery light was on. The alternator was replaced. 
75020 mi Signal light switch fails to cancel after a turn, must manually switch off after right turns. 
14985 mi

US $36
Battery leaked; no electrical system problems found after check of alternator and battery, likely was overfilled battery fluid. Cleaned up connectors and battery/battery box. 
134000 mi AC and heat failure, oily residue on a few wheels. Trading in. 

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2005 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 4-speed shiftable automatic FWD

50000 mi I had Mazda install the remote starter, after 8 months, it stopped working and car shut off on its own. They said it is common and dealer fixed it. 
52000 mi

US $115
Replaced the battery 
53000 mi

US $140
Vehicle would not start because the transmission interlock sensor had become corroded which meant the system did not detect the "park" position and would not start. Dealer cleaned and lubricated the affected parts. 
55000 mi

US $391
recharged air conditioner 
19000 mi CD player needed replacement 
26000 mi AC fan was making noises. Dealer took all day to incorrectly diagnose and order part. Never called to say part was in. Took another two days. Fixed problem, but would have taken only one day if they'd THOROUGHLY looked at the problem. HATE dealer service. 
33000 mi

US $125
AC recharged. 
146940 mi

C $110
but this was not the real problem: air conditioning compressor starting to fail: causing belt noise 
149040 mi

C $700
replaced compressor 

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2005 Mazda Mazda3 4dr Hatch

160-horsepower 2.3L I4 5-speed manual FWD

31000 mi Brake light switch failed, causing non-working brake lights and illuminating check engine light. 
67000 mi

US $400
One HID headlight not working, had to remove front bumper to replace bulb, still did not work, ballast was bad and had to be replaced. 
69000 mi

US $118
Broken wire in main wiring harness, causing non-working HID low-beam headlight. Isolated short, repaired. Broke wire in main wiring harness, causing non-working HID low-beam headlight. Isolated short, repaired 
142000 mi

US $25
Passenger headlight out, replaced both as I wasn't happy with the light pattern with the cheap driver's bulb I installed several months ago. 
196000 mi

US $75
Replaced noisy HVAC blower. Very difficult to access. 
198000 mi

US $88
Replaced one head light and one fog light 
202000 mi

US $177
Replaced alternator 
22500 mi Doors would not close because the car would think that the key is still inside 
65000 mi

US $80
headlight bulb replaced 
70000 mi

US $220
headlight bulb replaced 
38400 mi

US $10
Headlight bulb. 
132000 mi

US $200
Replaced blower motor 
86800 mi

C $15
R/H wiper post housing. Cracked plastic housing, held together with adustable collars. Does the job intended. 
124080 mi

C $100
Broken wire caused brake lights not to work 
79980 mi

C $830
Car died while driving. Ended up being the Alternator and they also replaced the Battery. Alternator is apparently a dealer-only part as it's specialized. 
73000 mi

US $400
AC controls inop with fan speed at max. 
90000 mi

US $350
Drivers window inop. Window motor found to be faulty. 
56000 mi

US $100
a/c compressor and associated magnetic clutch seized. dealer replaced above parts as well as associated pully and belt. cost of $1500 parts and labor covered by extended warranty less $100 deductible. 

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2005 Mazda Mazda3 4dr Hatch

160-horsepower 2.3L I4 4-speed shiftable automatic FWD

50000 mi

US $292
Airbag warning light on-attempted repair-3 days after the repair-sensor light came back on. Scheduled for re-repair Monday August 10th. $98 for this repair. 
64000 mi

US $505
A/C magnet B+ wire frayed, soldered and repaired. 
67200 mi

US $1700
Total failure of AC clutch, compressor, accumulator. All parts replaced and AC is returned to funtionality. 
24400 mi Replaced right front tire pressure monitor, it was intermittently shorting out. Repair is under warranty. 
65000 mi

US $230
Right blinker will not turn off automatically after turning, must be turned off manually. 
30000 mi Headlights wouldn't turn off; told it was a defect with the fuse box. 
44000 mi

US $50
Low-beam headlight went out, so I replaced both left and right low-beam headlight bulbs. 
65000 mi

US $1900
AC went out. Seal on compressor had gone bad and leaked all out all of the refrigerant. New seal and system recharge fixed problem. Fix required significant labor to remove, fix, & re-install compressor. 
67000 mi

US $417
Replaced both (!) front headlight bulbs 
86000 mi

US $100
Headlight socket went bad, unit needed to be replaced. 
47000 mi

US $600
Horn did not sound. 
72000 mi

US $1300
Horn stopped working, was replaced. 
64000 mi

US $400
low beam headlight(s) replaced. also has all wipers replaced. 
70680 mi

$60
Replace drivers power window master switch as it stopped operating front passenger side window. 
102900 mi

US $1000
Replaced AC compressor 
133000 mi

US $100
Alternator died. Replaced with aftermarket unit. 
45880 mi

C $15
Driver headlight low beam had to be replaced. Replaced by owner. 

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2005 Mazda Mazda3 4-door

4-cylinder manual 2WD

118420 mi

€60
OEM Xenon ballast faulty on passenger side (Didn't always turn on) 

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2004 Mazda Mazda3

Engine not specified

45000 mi Airbag light just stays on. Been at the dealer several times 
56000 mi

US $100
Light behind dash controls dead. 

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2004 Mazda Mazda3 4dr Sedan

160-horsepower 2.3L I4 5-speed manual FWD

55000 mi

US $80
The driver's side headlight bulb needed to be replaced. The old one had quit working. 
63000 mi

US $30
The passenger sight headlight went out; I replaced the bulb.  I replaced the turn signal switch in the steering wheel, as it would stick when in the "right" position. This cost $85 for parts, in addition to the $30 I spent on the passenger-side headlight.  
94000 mi

US $50
Front left headlight went out; bought a new bulb and replaced myself. Dealer didn't install it, but kindly showed me how. 
109200 mi

US $800
The AC button worked intermittently; a switch was bad. The dealer replaced the entire AC control panel. 
115800 mi

US $65
Replaced driver side headlight. The headlight bulbs seem to burn out faster than they should. 
147000 mi

US $500
Rear window switches and driver's master window switch didn't work properly or reliably. Had all replaced. Headlight bulb died (again). I have great difficulty with the clip, so I let the dealer do it after I ordered the part. 
96000 mi

US $650
air conditioning didn't work. A hose needed to be replaced. Air conditioning system needed to be recharged. 
111000 mi

US $225
a/c recharge since it was blowing warm air 
60000 mi

US $458
Airbag sensor and drivers seatbelt pretensioner. 
65000 mi

US $15
Headlight out. 4th time headlights have gone out on car. 2nd time on this housing in 9 months. 
102300 mi

C $55
Electric side mirrors. 1 day both sides stopped tilting up and to the left -> Obviously a switch problem: i.e. Chance both motors failed at exact way&time? Slim to none, right? No tech. needed for that info. yet charged $55 for diagnose. Rip off. Power side mirrors failed - stopped tilting up and to the left. Asked for tech advice but instead charged $55 for 0.5 hours labour to diagnose. My bad, i.e. should have went directly to parts counter to ask my question. 
153840 mi

C $20
Driver's window switch would only intermittently raise the window. Parts, eBay, $20. Mazda wanted $270 before labour. Five minutes to install. The driver's window in particular has been used thousands of times. 
160580 mi

C $350
Starter gave up the ghost. $200 parts & $150 labour. 

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2004 Mazda Mazda3 4dr Sedan

160-horsepower 2.3L I4 4-speed shiftable automatic FWD

72000 mi

US $280
Blower motor went out. Replaced with new blower motor. 
73780 mi

C $1200
Evaporator failed and had to be replaced. Possibly because of contaminants. 
73000 mi

US $1100
A/C compressor locked up 
93000 mi A/C compressor seized, locked up tighter than the hubs of hell 
99000 mi

US $320
a/c compressor and dryer, evac and recharge 

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2004 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 5-speed manual FWD

139000 mi

US $30
Driver's side headlight out 
154000 mi

US $478
Discharge side hose had a leak and a new hose was installed. The system was then recharged and checked for leaks. 
169200 mi

US $88
Speed sensor on transmission changed. Speedometer was bouncing all over the place from 0mph to the actual mph. Turn signal unit changed. Blinker would not turn off automatically after turn was made. 
83080 mi

C $1000
ac compressor clutch seized. belt had to be cut to prevent damage to other parts. 
88660 mi

C $1000
a/c compressor replaced due to faulty clutch 
12400 mi Airbag sensor recall 
116560 mi

C $308
Speedometer and odometer were not working. Dealer replaced vehicle speed sensor 

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2004 Mazda Mazda3 4dr Sedan

148-horsepower 2.0L I4 4-speed shiftable automatic FWD

65000 mi

US $300
AC condenser replaced and AC system refilled with freon. AC compresor is noted as making noise and needs to be replaced. 
69000 mi

US $185
AC compressor was replaced 
3100 mi Replacement of faulty airbag sensor - under warranty. 
237640 mi

C $25
Socket for driver side bulb replaced; problem solved for 1 month then failed again. 

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2004 Mazda Mazda3 4dr Hatch

160-horsepower 2.3L I4 5-speed manual FWD

38000 mi Clunking noise when rolling down driver's power window. 
129000 mi SRS; driver's side seatbelt pre-tensioner required wiring adjustment. Airbag light, diagnosed with code reader. Cost two tie wraps. 
157000 mi

US $200
Passenger side headlight went out. The connector stopped making solid contact with the bulb assembly; requires about 5 degree clockwise turn to make connection again. Will perform connector surgery when sunlight returns to the PNW. Living with it for now. 
157000 mi Passenger side junction box under glove box. Affects tail lights and interior panel dimming when headlight switch is turned on. Too expensive to replace at the moment; "tap" with a rubber mallet in the sweet spot to activate failing relay. 
148000 mi The new buyer was informed to replace the starter. 
159000 mi

US $100
Battery died due to very cold temperatures in the northeast. Swapped out & changed a corroded negative terminal. 
108000 mi

US $30
AC was weak, recharged 
19000 mi A/C didn't blow cold on hot days. Repaired by installing pollen filter per service bulletin. 
35000 mi Driver's door window made noise when opening or reversing direction. Window regulator adjusted and switch assembly replaced under warranty. 
140900 mi

US $100
fixed it. 

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2004 Mazda Mazda3 4dr Hatch

160-horsepower 2.3L I4 4-speed shiftable automatic FWD

71300 mi AC stopped working on May 10, 2014 at about 71,500 miles on it. Repair shop wanted $1,200 to diagnose and replace the part (AC compressor) but I found part online for $700. Decided not to do repair yet due to disability. 
71200 mi

US $1163
Replaced blower motor and recharged AC. Also did recommended oil change. 
77000 mi Had to replace both rear taillights and headlights. 
105400 mi

C $300
Alternator failed and was replaced. 
120280 mi

C $200
Rust in fuse box, some connections damaged. 
126000 mi

US $500
Noticed A/C noise, turned out it was the A/C clutch, which was normal".  
101000 mi

US $1000
The wires connecting the airbag sensors were corroded. Both airbag harnesses were somehow damaged and had to be replaced. 
132000 mi

US $400
Air conditioner compressor failed. AC belt broke. 
140000 mi

US $250
Needed complete replacement of air compressor and all attendant coolant & belts. 
200001 mi Air compressor is shot. Estimated $1800 to fix the entire system. Cannot afford repair. 

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2004 Mazda Mazda3 4dr Hatch

148-horsepower 2.0L I4 5-speed manual FWD

63000 mi

US $150
Passenger side junction box needed to be replaced- Tripped relay forcing headlights to stay on and thus kill battery. Relay pulled and drove with high beams. $800 part found at junkyard for $150. Repaired for $90 in labor. 

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2004 Mazda Mazda3 4-door

4-cylinder manual 2WD

260000 mi Electrical issues: the dash lights, low beams, and tail lights would sometimes turn on using the switch and they would turn off on their own. I read on the Internet that hitting the dash in certain spots would turn them on, and this worked for a while. 

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2004 Mazda Mazda3 4-door

4-cylinder automatic 2WD

45880 mi

C $10
Changed Driver-side Rear Brake Light 

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See TrueDelta's information for all Sedans and Hatchbacks.
See TrueDelta's information for all Mazda models.

Mazda Mazda3 Electrical Problems

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