| 1 | 0 | 3 | 4 | 3 | 4 |
Mazda MX-5 Miata repairs by problem area
Engine (32%)
Transmission and Drivetrain (10%)
Brakes and Traction Control (5%)
Suspension and Steering (7%)
Electrical and Air Conditioning (25%)
Paint, Rust, Leaks, Rattles, and Trim (14%)
Other (6%)
Chart based on 482 repairs.
Mazda MX-5 Miata engine repair cost distribution
$2500+ (6%)
$1000 - $2499 (8%)
$500 - $999 (18%)
$100 - $499 (37%)
< $100 (31%)
Chart based on 141 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2017 Mazda MX-5 Miata 2dr Convertible
155-horsepower 2.0L I4 6-speed manual RWD
| 99180 mi US $612 |
Replaced front and rear valve cover gaskets. Replaced intake manifold gasket. |
2016 Mazda MX-5 Miata 2dr Convertible
155-horsepower 2.0L I4 6-speed manual RWD
| 16000 mi US $260 |
Faulty spark plug, replaced all four at the same time. |
| 111000 mi US $275 |
failed crankshaft sensor; engine died on a trip, car was towed to shop |
2011 Mazda MX-5 Miata 2dr Convertible
167-horsepower 2.0L I4 6-speed manual RWD
| 46500 mi | Replaced catalytic converter |
2010 Mazda MX-5 Miata 2dr Convertible
167-horsepower 2.0L I4 6-speed manual RWD
| 60000 mi US $80 |
Clean MAF and throttle body, attend to rich fuel CEL, oil/filter change. |
2010 Mazda MX-5 Miata 2dr Convertible
158-horsepower 2.0L I4 6-speed shiftable automatic RWD
| 73560 mi US $873 |
engine light on, Code p401 Egr flow not reacting to command, Replaced valve, cleared the code, retest system OK |
2009 Mazda MX-5 Miata 2dr Convertible
167-horsepower 2.0L I4 6-speed manual RWD
| 1968 mi US $89 |
Oil & Filter Change. Full Synthetic |
| 950 mi | In the prior repair the radiator was replaced. After, I still smelled coolant and the reservoir level was low. Dealer's shop said there was air in the system which fooled the coolant level but air worked out. They cleaned engine area and topped coolant. |
| 927 mi | Radiator replaced by dealer under warranty. Took two days to obtain, and two days to complete repair. Car seems fine now although some antifreeze smell lingers. Dealer returned car washed and cleaned. |
2008 Mazda MX-5 Miata 2dr Convertible
166-horsepower 2.0L I4 6-speed manual RWD
| 39000 mi US $348 |
replaced fraying serpentine belt |
| 49949 mi US $2789 |
Engine misfired and stalled. Repair consisted of: PCM update/re-learned throttle body/replaced Cam and Crank Sensor/replaced all spark plugs/replaced #1 & 2 injectors/replaced MAP sensor and EGR valve--(MAP Sensor had missing internal valve and EGR valve had carbon keeping valve open, causing a constant vacuum leak). |
| 20000 mi | Faulty belt tensioner. |
| 73000 mi US $400 |
Thermostat |
| 15580 mi | Coolant temperature gauge went up to 3/4ths mark when idling (117-118c), regardless of ambient air temperature, but did not overheat. Thermostat repaired under warranty. |
2008 Mazda MX-5 Miata 2dr Convertible
166-horsepower 2.0L I4 5-speed manual RWD
| 67000 mi US $320 |
Car would not idle correctly. Two items: Computer has a service bulletin (TSB) requiring a flash and carbon build up behind manifold plate. Service recommended injector cleaning also. Once completed ran perfect. |
2008 Mazda MX-5 Miata 2dr Convertible
158-horsepower 2.0L I4 6-speed shiftable automatic RWD
| 49000 mi US $1000 |
Oxygen sensor died. |
| 121000 mi | I replaced the thermostat and replaced radiator-cooling fluid. I replaced the coolant expansion tank with an aluminum one as the plastic tanks are prone to abrupt failure, for an additional $230. |
| 28800 mi | Purge Solenoid Failed |
| 48000 mi | Gas cap needed to be replaced. System pressure leak caused the engine light to activate. |
| 52000 mi US $1138 |
Replaced all belts, including timing belt and water pump. Also one fuse. |
2007 Mazda MX-5 Miata 2dr Convertible
166-horsepower 2.0L I4 6-speed manual RWD
| 62300 mi US $30 |
Thermostat malfunction. Check engine light on. |
| 109000 mi US $300 |
Replace electric cooling fan motor |
| 98000 mi US $400 |
replace thermostat and perform oil change |
| 72400 mi US $90 |
exhaust system heat shield needed to be welded in place. the shield was about to fall off the catalytic converter. |
| 39980 mi | Check engine light on. intermittent misfire. plugs replaced and efi cleaned. May need EGR valve serviced. Okay 2 weeks then CEL recurred. Now a vacuum leak, orig prob okay, may just be gas cap, new one ordered. |
| 41540 mi C $250 |
Needed new gas cap. replaced. problem has not recurred. |
| 99000 mi US $3500 |
Spun crank bearing in cylinder no 1, caused connecting rod to break. Car required new engine. |
| 900 mi | Malfunction Indicator Light. Evap system. Fuel cap replaced under Technical Service Bulletin. Should have been done while in dealer inventory based on details in the TSB. |
| 28000 mi | Replace Fuel Filler Cap due to leak in evap system. |
2007 Mazda MX-5 Miata 2dr Convertible
166-horsepower 2.0L I4 5-speed manual RWD
| 99000 mi US $1500 |
valve cover gasket replaced. |
2007 Mazda MX-5 Miata 2dr Convertible
163-horsepower 2.0L I4 6-speed shiftable automatic RWD
| 81000 mi US $122 |
Replaced the Thermostat. Part was $30 and i probably could have replaced it myself with the proper tools. |
| 52080 mi C $130 |
Muffler replaced due rusted out |
| 48600 mi US $279 |
Check engine light came on. When checked code for thermostat in cooling system was malfunctioning. Two other Mazda's (2006)Mazda3 and (2007)Mazda3 were in same shop with same problem at approx. same mileage. |
| 51500 mi US $100 |
check engine light diagnosed as thermostat, replaced. |
| 48000 mi US $300 |
Oxygen sensor had to be replaced. Check engine light was on. |
| 109900 mi US $400 |
Replaced O2 sensor |
2006 Mazda MX-5 Miata 2dr Convertible
170-horsepower 2.0L I4 6-speed manual RWD
| 92200 mi US $140 |
Plastic radiator cracked. Replaced it with all aluminum radiator. Completed repair myself |
| 101700 mi US $950 |
Timing belt, water pump, cam seals, front main seal (leaking pretty badly), a few related "while we are there" items |
| 34000 mi US $100 |
evap leak code, unable to pass emissions test. replaced gas cap and evap solenoid |
| 46850 mi US $500 |
Replaced hissing pressurized plastic coolant tank. |
| 118000 mi US $250 |
Coolant reservoir cracked and cooling system was not pressurized. Also replaced thermostat while the coolant was drained as a preventative measure. |
| 139000 mi US $2500 |
Valve train replaced -- still serious valve related noise -- repair unsuccessful Vehicle inoperative |
| 62000 mi | Burning smell. Loose fitting allowed oil to fall onto exhaust. Problem diagnosed and sorted by mechanic who deemed he was responsible at servicing 6 months earlier so no charge and oil top up gratis. |
| 76100 mi US $300 |
thermostat |
| 13900 mi US $180 |
Emission system gross leak PO455 code Likely a valve near the fuel tank. Not completed yet. Still diagnosing and researching. |
| 14000 mi | They smoked the emission system and found an air pump in the rear that needed replacing. Expensive little thing. |
| 45000 mi US $500 |
Was getting CEL for cooling system, had to replace the overflow reservoir and had thermostat done at the same time. Heard that others have had thermostat failures too. |
| 64000 mi US $91 |
Check Engine Light for Code P0126 (Engine Coolant Below Temp) Apparently there was a design flaw that is addressed by a Mazda Service Bulletin. Never had a problem with mine until now. Clear the CEL and the P0126 code will come back on within a 30 minute trip. |
| 30000 mi US $560 |
Check engine light - low coolant temperature. Replaced thermostat. Problem fixed. |
| 50000 mi US $132 |
Cooling system sensor had to be replaced. Check engine light had come on to let me know there was a problem. |
| 51000 mi US $214 |
Thermostat stuck open. Had to be replaced. |
| 28000 mi US $75 |
Misfire in a cylinder causing very poor performance. We replaced the spark plug and fed the car a fuel injector cleaner (Techron). We bought a replacement injector but have not installed it because the car is running very well. |
| 32000 mi US $60 |
chirping from engine area. believed to be vibration noise. mechanic harnessed some wires thought to be the problem, but did not work. dealer unable to resolve. belt tensioner coming apart. |
| 46000 mi US $57 |
Got CEL (p0126) read at auto parts. Googling landed me http://forum.miata.net/vb/showthread.php?t=335589 with all info needed for diy. Did work myself. |
| 43000 mi US $130 |
a new thermostat was installed |
2006 Mazda MX-5 Miata 2dr Convertible
170-horsepower 2.0L I4 5-speed manual RWD
| 66000 mi US $40 |
Vacuum leak |
| 92000 mi US $5800 |
The rod blew out when I was passing a car on a 2-lane road. I had to replace the engine. I replaced the clutch while it was easy |
| 96000 mi US $1100 |
Massive oil leak due to one of the timing cover bolt came off while driving. No sign cam cover has been taken off before (looks like oem sealant when cover removed). Oil sprayed all over engine bay and cooling system (radiator and fan). |
| 97000 mi US $90 |
Misfire cylinder 1. Bad ignition coil. |
| 150000 mi | Coolant temperature sensor |
| 45000 mi US $250 |
Accessory belt tensioner rattling intermittently, had a small amount of play in the pulley. Repair was simple, problem has not returned. Repair was at Approx. 45,000 miles in mid-2014. Quick repair, < 1 Hr. $250 part replaced. |
2006 Mazda MX-5 Miata 2dr Convertible
166-horsepower 2.0L I4 6-speed shiftable automatic RWD
| 6 mi US $23500 |
gas cap leak, caused check engine light to come on |
| 25000 mi | the computer in car has to be updated due to it sitting all winter under a car cover and couldn't get service light to turn off without the update to the on-board computer. |
| 185000 mi US $300 |
Plastic header on the radiator failed after 183,000 miles. Replaced radiator. |
| 76700 mi US $295 |
Check Engine Light on; code indicated failed thermostat. Replaced thermostat and performed 60k mile cooling system maintenance, as well as an oil change. |
2006 Mazda MX-5 Miata 2-door
4-cylinder automatic 2WD
| 130000 mi US $600 |
Top engine rebuild, coolant system repair, engine relearn |
2005 Mazda Miata MX-5 2dr Convertible
turbocharged 178hp 1.8L I4 6-speed manual RWD
| 12000 mi US $2500 |
3rd gear sychro bearing shifted in it's bedding? Made crazy squeal. John Hine dealership said no, you raced it. El Cajon Mazda said sure under warranty, saved $4K! Installed FM (Flyin' Miata) hard pipe intake and high-flow air filter, as well as, oversize intercooler, CO2 cryo "Halo" and 10lb bottle. Stainless Braided Brake lines, slotted & cross-drilled rotors and kevlar pads. Manual boost controller |
| 19000 mi US $5 |
Metal clamp that attaches air intake hose came loose. Car ran very badly-gets too much air. Car towed in free. Dealer discovers problem-tightens clamp. Clamp comes off again one week later. I buy new smaller clamp-tighten. Works perfect. Go figure. |
2004 Mazda Miata MX-5 2dr Convertible
turbocharged 178hp 1.8L I4 6-speed manual RWD
| 97200 mi US $25 |
Thermostat failed open, symptoms include very slow warm up and poor temperature regulation. |
| 76880 mi A $500 |
Car loses power on hot days and has to pull over. Believed to be petrol pump which repaired but problem remains. Car has to be put in again at mechanic. |
| 108000 mi US $600 |
fuel pump-replaced. |
| 111300 mi | Crank angle sensor. |
| 115000 mi US $120 |
Replace O2 sensor |
| 115000 mi | VTCS solenoid died. Simple replacement. |
| 99000 mi US $400 |
Oil pan gasket leaking and new engine mounts required. |
| 63000 mi US $600 |
Oil leak - oil pan gaskets needed to be replaced. The engine mounts were replaced at the same time. |
| 60000 mi US $400 |
Radiator replaced at the suggestion of mechanic. Tanks discolored, was told it could fail soon after 10 years of service. |
2004 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 6-speed manual RWD
| 87000 mi | Engine leaks oil, likely from rear main seal. Definitely not from the valve cover gasket. |
| 92000 mi US $500 |
Radiator cracked. Replaced radiator. |
2004 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 5-speed manual RWD
| 102000 mi US $870 |
front cat failure |
| 120000 mi US $736 |
Two ignition coil packs |
| 112000 mi US $1000 |
Camshaft sensor was throwing an ODB2 error code and needed to be replaced. |
| 122000 mi US $300 |
Crankshaft sensor replaced because loss of signal was causing engine misfire. |
| 122000 mi US $1500 |
Full tune up: valve cover gasket, valve clearances, timing adjustments. I was having a small oil leak from the valve gasket cover. I was also experiencing harsh misfiring at full or even partial throttle which was fixed via the tune up. |
2004 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 4-speed automatic RWD
| 45000 mi US $900 |
Car just coughs and dies No repair, paid cost looking for problem. Took to local garage found cause to be Gas. Too much alcohol in gas. Only now go to certain stations without alcohol. |
2003 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 6-speed manual RWD
| 40000 mi US $40 |
Replaced rear O2 sensor |
2003 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 5-speed manual RWD
| 27125 mi C $300 |
Change front O2 sensor. |
| 28675 mi C $15 |
Repair front O2 sensor wire - misrouted wire leaning against the exhaust got partially burned. |
| 49500 mi US $57 |
R&R Cam position sensor. |
| 1400 mi | VVTi oil pipe leaks engine oil. Repaired under warranty. |
2002 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 6-speed manual RWD
| 87000 mi US $340 |
Fuel tank sensor had to be replaced. |
| 141000 mi US $340 |
Oil sensor was leaking. Replaced seal. |
| 122000 mi US $450 |
oxygen sensor replaced |
| 71000 mi US $500 |
Coolant leak from gasket near water pump |
2002 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 5-speed manual RWD
| 215000 mi US $500 |
Crank but not start; replaced battery. Intermittent no fire on 2 cylinders; replaced coil packs. |
| 216528 mi US $54 |
Front cam and crank seals leaking. Replaced seal. Since they had to be removed for main repair, also replaced water pump, timing belt, tensioners, and accessory drive belts. Crank but no start at high underhood temperatures. Replaced camshaft position sensor. |
| 216957 mi US $166 |
No fuel pressure. Replaced fuel pump and filter. |
| 59100 mi US $2200 |
Harmonic balancer destroyed the end of the crankshaft. Had to have a complete used engine installed. |
| 182000 mi US $525 |
Clutch Replacement, Flywheel resurfacing. |
| 171000 mi US $300 |
fuel modulator |
| 83100 mi US $200 |
Replaced rear O2 sensor |
| 84000 mi US $200 |
Coil pack failure, replaced |
2001 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 6-speed manual RWD
| 67000 mi US $150 |
Replaced two O2 sensors |
| 63000 mi US $40 |
Engine light came on, shop read code (loose gas cap), examined entire evap. control system, reset engine light. |
| 139000 mi US $53 |
The car began stalling out while driving at speed on trips longer than 20 miles. The symptoms were most frequent on hot days with the A/C running. The computer threw a code for the Cam Angle Sensor which, once replaced, fixed the problem. |
| 154000 mi US $75 |
Radiator developed a leak, requiring replacement. |
| 107000 mi US $175 |
Check engine light due to O2 sensor |
| 108000 mi US $180 |
Replaced bad o2 sensor, causing the cat to burn out. If this had been fixed sooner the cat wouldn't have been damaged |
2001 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 5-speed manual RWD
| 58900 mi C $60 |
post cat oxygen sensor replacement |
| 225000 mi US $700 |
Replaced clutch |
| 72000 mi US $650 |
engine temp module replaced |
| 145000 mi US $1122 |
I was 84,000 miles overdue for a timing belt change when I noticed a leak at the top of the original equipment radiator, so I had the radiator, thermostat, water pump, hoses and timing belt replaced and the oil and transmission oil changed. HTH! |
| 148000 mi US $247 |
Another coolant hose. |
| 202500 mi US $227 |
radiator, oil filter, air filter, Mobil 1, coolant, parts (7553) |
| 74000 mi US $1000 |
Running hot. Replace radiator, hoses, thermostat. |
| 75000 mi US $2200 |
Entire exhaust too rusted to be reattached following clutch replacement. Replaced mid-pipe, cat, rear muffler and sensors. |
| 87000 mi US $500 |
Replace fuel injector to correct misfire and cel. |
| 114000 mi US $500 |
Catalytic converter ignition coil |
| 119300 mi US $500 |
Exhaust leak |
| 131000 mi US $500 |
Ignition coil. Cat. |
| 132000 mi US $200 |
Radiator |
2001 Mazda Miata MX-5 2dr Convertible
142-horsepower 1.8L I4 4-speed automatic RWD
| 74589 mi US $450 |
Replaced cam position sensor |
2000 Mazda Miata MX-5 2dr Convertible
140-horsepower 1.8L I4 6-speed manual RWD
| 96000 mi US $230 |
plugs and ignition wires replaced |
| 115000 mi | car lost power due to failing fuel pump, limped home and then died |
2000 Mazda Miata MX-5 2dr Convertible
140-horsepower 1.8L I4 5-speed manual RWD
| 97700 mi US $95 |
replace leaking fuel pressure damper Diagnosed leaking fuel pressure damper. Replaced with new unit. |
1999 Mazda Miata MX-5
Engine not specified
| 70000 mi | New exhaust required |
| 112320 mi | replaced water pump soldered muffler bracket |
| 122000 mi | Replaced oxygen sensor, oil sending unit,and valvecover gasket. |
| 99000 mi US $700 |
New catalytic converter and OBD reset. |
1999 Mazda Miata MX-5 2-door
4-cylinder manual 2WD
| 162000 mi US $900 |
When dealer changed the timing belt 20000 miles ago, they didn't tighten the key, later causing engine failure and necessitating redo and replacement of the bolt. |
| 93000 mi US $10 |
Leaking thermostat housing at block, part removed, cleaned and resealed, problem fixed. |
| 57000 mi US $472 |
Radiator replaced due to leaking. |
| 73000 mi US $500 |
"check engine" light due to stuck EGR valve, apparently due to deposits in intake manifold. Cleaned intake and EGR valve. |
| 82000 mi US $200 |
Improperly install valve cover seal from earlier service at Mazda dealer caused oil leak. Valve cover was replaced. |
1999 Mazda MX-5 Miata
Engine not specified
| 65000 mi US $6000 |
Full engine rebuild. Number 2 and 4 rods went. Could have just repairs those, but instead rebuilding low compression motor for supercharging system i will install this winter. |
| 212200 mi US $400 |
Replace timing belt, spark plugs, Thermostat, etc. Oil leaking from oil pan. |
| 213000 mi US $80 |
Header/exhaust manifold bolts needed to be tightened. |
| 99000 mi US $140 |
ignition wires had to be replaced, this is the 2nd time that these wires had to be replaced in a span of two years. Car experienced stutter and uneven acceleration. |
1999 Mazda MX-5 Miata 2-door
4-cylinder manual 2WD
| 159000 mi US $9000 |
After overheating and breaking down and being towed I was told an oil leak caused a plastic engine shield to bend which broke the alternator belt which caused the water pump to fail. |
| 88000 mi US $200 |
Didn't pass emission inspection. EGR valve replaced |
| 90000 mi US $121 |
Running hot after going through high water. Shop unable to duplicate. Check engine light also on. Cleaned EGR valve. |
| 124000 mi US $150 |
[engine ignition or emissions repair] |
| 146000 mi | Replaced thermostat, radiator cap, and flushed the radiator. |
1995 Mazda MX-5 Miata 2-door
4-cylinder manual 2WD
| 5864 mi US $1652 |
Car came in 8 tupperware boxes after suffering saltwater exposure. Previous buyer stripped it to the body, flushed it out, and gave up, selling all of the parts and the car. This "repair" includes all the parts to rebuild the engine, replace most of the wiring, rip apart every subsystem, and put the entire car back together. |
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