| 1 | 0 | 3 | 4 | 3 | 4 |
Infiniti M repairs by problem area
Engine (22%)
Transmission and Drivetrain (5%)
Brakes and Traction Control (7%)
Suspension and Steering (16%)
Electrical and Air Conditioning (29%)
Paint, Rust, Leaks, Rattles, and Trim (13%)
Other (8%)
Chart based on 791 repairs.
Infiniti M engine repair cost distribution
$2500+ (2%)
$1000 - $2499 (11%)
$500 - $999 (19%)
$100 - $499 (30%)
< $100 (38%)
Chart based on 161 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2012 Infiniti M
Engine not specified
| 81000 mi | Driver side vents wouldn't spit out hot air. Dealer replaced the Heater core and blend doors. Car was in the shop just over 3 weeks all told. Would have cost ~ $3500 out of pocket. Dealer I bought the car from (discovered the problem 2 days after purchase) ate the cost. As a result of the previous trip to replace the heater core, the heater core hose was torn and I discovered that courtesy of the distinct smell of hot coolant. Dealer replaced under warranty of the previous work done. |
| 84000 mi US $500 |
Went in for an idle issue on cold start. They changed the 12v hybrid battery. Did not solve the issue. |
2012 Infiniti M 4dr Sedan
330-horsepower 3.7L V6 7-speed shiftable automatic RWD
| 61000 mi | SES light came on. Required a reprogram to reset it. |
| 25000 mi | Brake and battery light were coming on. Replaced alternator did not fix it, replaced engine harness with one version did not fix it, a second engine harness did repair it. |
2011 Infiniti M 4dr Sedan
420-horsepower 5.6L V8 7-speed shiftable automatic RWD
| 10000 mi | Car engine-braked when taking foot off the pedal in Sport mode, had jerky starts from stop, and exhibited uneven acceleration/gears. ITB11008 was installed to reprogram the ECM/TCM so that the car would drive more smoothly and predictably. |
| 48500 mi US $530 |
SES light came on, Infniti dlr. tried to fix, charged $410, failed to fix. Nissan dealer corrected Infiniti work, $120. Fix worked. Was a gas cap. Car is great, Infiniti is not. |
| 39500 mi | Idle controller was reset. On rare occasions, the car would start and immediately turn off. |
| 52000 mi | Replaced timing chain. Coolant hose damaged by dealer in previous repair. |
| 83000 mi US $1800 |
Driver's side catalytic converter replaced. |
| 85000 mi US $800 |
Replaced fuel pump |
| 99000 mi US $155 |
ECM reflash, was throwing CEL for Manifold Pressure. |
2011 Infiniti M 4dr Sedan
420-horsepower 5.6L V8 7-speed shiftable automatic AWD
| 35000 mi US $145 |
Replaced squealing belts |
| 6000 mi | Rough / Agressive downshifting of transmission, transmission holding low gears while coasting, rough idle. Addressed via TSB software reflash of ECM |
| 14500 mi | Service Engine Soon light came on. Dealer had to replace Air Fuel sensor |
| 13700 mi US $212 |
Service Engine Soon light on. Dealer recommended Fuel Injector and Intake flush. Vibration / high idle and rough shifting. Dealer also updated ECM software |
| 31040 mi | timing belt technical bulletin |
| 80000 mi US $3800 |
Bad sensor on camshaft |
| 45500 mi | Check Engine Soon light came on and engine idle increased fr 400rpm to 1000rpm. Dealer stated they reprogramed ECM as part of TSB 12-018. Seems to have fixed the prob. |
| 56000 mi | Failed emissions inspection - dealer replaced gas cap. Dealer also updated ECM/TCM transmission software because of acceleration lag. |
| 96100 mi C $40 |
serpentine belt tensioner bearing |
| 88040 mi C $700 |
Valve timing control solenoid |
| 79000 mi | After my timing chain recall visit, the tech got air in the coolant system. Had to have system bled. |
| 136200 mi US $200 |
Just the welding of my mufflers as the pipe leading to them rusted and snapped. |
| 18500 mi | Service Engine Light came on. Car started running rough. ECM was reprogrammed. Dealer said there was a TSB for this issue. |
2011 Infiniti M 4dr Sedan
330-horsepower 3.7L V6 7-speed shiftable automatic RWD
| 29200 mi | Emissions control - loose gas cap alert triggered service engine soon warning. No problem found. |
| 129000 mi US $431 |
Replace intake air tube, driver side |
| 58700 mi US $750 |
Mass air flow sensor went bad, replaced both |
| 26200 mi | Replaced BCM Module - car out of service for 2 weeks while part ordered from Japan. |
| 63000 mi | Oil Leak. - Lower oil pan was resealed |
| 77000 mi US $265 |
Serpentine belt replaced. |
2011 Infiniti M 4dr Sedan
330-horsepower 3.7L V6 7-speed shiftable automatic AWD
| 34000 mi | Failed #6 fuel injector. Warranty repair: Injector replaced, exhaust valves replaced, cylinder head replaced. Repair done over Thanksgiving holiday-would have been 5-6 days normally. |
| 4000 mi | transmission reflashed |
| 29760 mi | Out of town trip car suddenly slowed down and started jerking. Transmission kept shifting up and down. Would not go over 60 K/hr.Called road side assist response was great. Trucked 250 KM to toronto. Two air flow sensors replaced. |
| 1300 mi | Faulty gas cap caused service engine soon light to come on. |
| 62000 mi US $60 |
Fuel cap needs to be turned to click three times so it seals properly, but this is not written anywhere on the vehicle so I did not know about this requirement until the service associate told me. |
2008 Infiniti M 4dr Sedan
325-horsepower 4.5L V8 5-speed shiftable automatic RWD
| 125000 mi US $1100 |
Replaced the y-pipe |
2008 Infiniti M 4dr Sedan
325-horsepower 4.5L V8 5-speed shiftable automatic AWD
| 69800 mi US $400 |
Radiator ruptured at lower plastic/metal interface |
2008 Infiniti M 4dr Sedan
275-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 71400 mi US $125 |
We are experiencing severe engine knock (pre-detonation). Unfortunately no repair was able...car still knocks under load. |
| 80000 mi US $500 |
Knocking continued with the vehicle. Dealer cleaned the fuel system. Problem mitigated (80 percent improvement). |
| 60200 mi | Problems starting and rough idle. |
| 61400 mi US $560 |
Relay had to be replaced to enable the engine cooling fan to work properly. Also fixed problems starting and rough idle. |
| 143000 mi US $600 |
Oil seal leak, flooded and damaged starter. Replaced starter and seal. |
| 39000 mi | Accelerator issue. Car would not accelerate. Car was towed to dealer and problem was fixed under warranty. |
2008 Infiniti M 4dr Sedan
275-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 15000 mi US $350 |
Something to do with the mounting screws for the transmission |
| 52000 mi | Went in for oil change and dealer found leaking manifold cover. Repair was made under the extended warranty I have on the car with no deductible. |
| 73000 mi US $600 |
System had a throttle sensor failure, the throttle sensor was replaced. Car displayed Service Engine Soon light, followed by TCA OFF light and the SLIP light. With the 3 lights on, the max RPM was 1500 RPM and max speed 5 Mph. |
| 75640 mi C $1400 |
Replaced intelligent power control module. |
2007 Infiniti M 4dr Sedan
325-horsepower 4.5L V8 5-speed shiftable automatic RWD
| 67000 mi US $140 |
belt replacement |
| 67000 mi | Leaking fuel injector rail was making car hard to start. Dealer replaced both fuel rails and fixed problem. |
| 146000 mi US $2300 |
Replaced valve covers and gaskets; replaced tensioner pulley and drive belt. |
| 78000 mi US $45 |
Replaced both belts. One of the old ones was making a squeaking noise. |
| 122000 mi US $25 |
CEL came on. Replaced gas cap. |
2007 Infiniti M 4dr Sedan
275-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 38000 mi US $60 |
Exhaust diffuser on tail pipe replaced. Had fallen off. |
| 15000 mi | Fuel Gauge not reading correctly. Parts required not yet fixed |
| 17000 mi | After repair problem persisited. I now think that the fuel tank is not bring completely filled at the pump. Fill up at end of long trip did not equal fuel that should have been used. |
| 18000 mi | Gas tank and fuel gauge reading is now corrected. |
| 72000 mi US $500 |
Leaking radiator |
| 72400 mi US $275 |
Leaky valve cover gaskets |
| 91000 mi US $800 |
Radiator leak and hose leaks |
| 89700 mi US $500 |
Vent control valve needed to be replaced in the emission system |
| 104800 mi US $1400 |
Replaced Valve Cover Gasket, Lower Oil Pan Gasket, Drive Belt |
| 111000 mi US $1100 |
Thermostat failed and hence made the radiator fail |
| 108000 mi US $100 |
oil cooler ring failed. 5 dollar part |
| 105700 mi US $230 |
Oil leaking from a seal. Replaced seal. |
| 141000 mi | Excessive oil burning. About a quart every 1k miles. Did not repair before selling. |
| 73000 mi US $200 |
Stuck thermostat. |
| 50000 mi US $200 |
Radiator fan module malfunctioned. Only 1 of the 2 fans were working. |
2007 Infiniti M 4dr Sedan
275-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 108000 mi US $1300 |
valve cover leaking oil; required replacement valve cover |
| 153000 mi US $210 |
Replaced radiator and fluid due to a small crack in plastic part of radiator near the filler neck. |
| 75500 mi | Noise form engine compartment. Drive belt was loose. Adjusted tension to specification |
| 78000 mi US $80 |
rattling from engine compartment. Exhaust manifold heat shield mounts were replaced. |
| 93000 mi | Radiator leaked. Radiator repaired |
| 145500 mi US $60 |
O ring leaking at oil cooler. Replaced O ring problem solved. |
| 164000 mi US $1000 |
left bank catalyst was starting to plug up, set code and lit "service engine soon" indicator. Replaced catalyst, car runs fine now. |
| 190700 mi US $750 |
Radiator tank ruptured requiring replacement of Radiator. |
| 144900 mi US $2600 |
Needed new catalytic converters, originals rusted. Decided to replace entire exhaust and intake with aftermarket. |
| 75000 mi US $650 |
Install aftermarket radiator |
2006 Infiniti M 4dr Sedan
335-horsepower 4.5L V8 5-speed shiftable automatic RWD
| 115000 mi US $75 |
Replace fan control module |
| 70000 mi US $250 |
rough start and pulsing during drive, then check engine light. Issue was fuel vent stuck closed, causing pressure to build in tank and line. Replaced fuel vent. slightly rough idle. Diagnosed as need for idle reset - should have occurred when battery was replaced months ago. |
| 82300 mi | Have continued to complain since 20k miles about a VERY rough start with engine clanking like an old diesel truck. Very loud! Lasts 30 seconds and then valves will continue to rattle for about 5 minutes. No solution! |
| 34000 mi | Engine making light tapping noise when warm, in gear at idle. Issued traced to a faulty fuel damper on the passenger side fuel rail. Part replaced per technical service bulletin and covered free of charge under Infiniti customer good will. |
| 128000 mi US $53 |
VERY loud tapping noise. Told that it is probably the #8 cylinder and may need another engine. |
| 83000 mi US $2100 |
Two sensors and the catalytic converter had to be replaced after having to be towed twice. Being stranded on the freeway in the HOV lane got our attention - I ordered a 2012 BMW 328i today. Expect delivery in 8 weeks. |
| 95000 mi US $1000 |
Overheating - radiator replaced |
| 78000 mi US $299 |
3 computer sensors were apparently rusty and not making contact |
| 68000 mi | Oil eating car. Infiniti even changed the PCV routing and designed new valve covers in 2008. The system was sucking the oil right out of the engine. Infiniti danced around on the issue. Only fix is new V8, $15k. I finally had enough and traded it in. |
| 124000 mi US $500 |
Fuel valve was faulty and had to be replaced. |
| 218000 mi US $300 |
Radiator Fan was cycling on high and it was louder than normal, no warning lights on in the car. Had control unit replaced. This allows fan to cycle to low or high fan. |
| 220000 mi US $1400 |
Had to replace one of the Catalytic Converters. |
| 269000 mi US $1300 |
Emissions system. Replaced 2nd catalytic converter. |
| 286000 mi US $1900 |
Radiator, water pump, belts, coolant and oil replaced. |
| 286000 mi US $640 |
Oil leaking, Strong burn odor in car cabin. Passenger side seal around rearmost spark plug defective allowing oil to build up in spark plug tube. Replaced Passenger side valve cover with new gasket to resolve. |
| 6000 mi | Number #7 piston failed. http://www.youtube.com/watch?v=KDQeCOJZcDM New engine installed (long block) |
| 35000 mi | Excessive oil consumption. Car is using one quart every 1500mi. This, as I found out in the NICO forum, is quite common on the 2006 M45 (V8 Model). I am very Pissed Infiniti did not fix this problem as they knew about it on the old 2003-5 M45 as well. |
| 26000 mi | Car started very rough, made lots of tapping noise, puff of bluish/white smoke, had to try to start 3-4 times. once started ran fine, no noise, I suspect fuel pump or some electonic starting issues. |
| 75500 mi US $100 |
Replaced Fan Controller for radiator fan. |
| 128000 mi US $200 |
Fan controller for radiator fans failed. Replaced faulty controller. |
| 161000 mi US $300 |
Crankshaft position and cam phase sensors replaced |
| 75000 mi | Prior to last 3,000 miles oil change, had to add 3/4 quart. Car burns oil, a problem that has existed since it was brand new. Dealer says it normal. Have had to add a full quart between oil changes in the past. |
| 57000 mi | Fuel quantity sensor replaced because the indicator would never show full even though the tank was full. fuel quantity sensor |
2006 Infiniti M 4dr Sedan
280-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 188000 mi US $250 |
Transmission mount |
| 54000 mi | Heatshield and/or Y Pipe issue causing noises, which started approx. around 51k miles |
| 67000 mi | There was a leak in the engine cap somewhere. Infiniti had already extended the warranty to 75K because of the known issue. Hence it was repaired under warranty. |
| 149000 mi US $325 |
Evap canister was not sealed correctly so I wasn't able to pump gas at a consistent rate. Repair was done, all is well now. |
| 89000 mi US $225 |
Camshaft position sensor in the left bank failed and had to be replaced. |
| 90000 mi US $400 |
Oil leak at the oil pump, fixed with new o-ring and reassembly. |
| 98000 mi US $3150 |
Radiator replaced due to a crack Engine belts replaced |
| 103000 mi US $575 |
Cooling fan motor replacement. |
| 41000 mi US $525 |
Bad camshaft position sensor causing car to stall. This is the second time for one of the sensors to fail (there are 2). Mechanic replaced 3 sensors in all to ensure safe operation. |
| 125800 mi US $330 |
Replaced cracked radiator |
| 159000 mi US $368 |
replaced spark plugs, oil leak at engine cooler both fixed |
| 180000 mi US $500 |
Heard a gurgurling noise from engine air was in coolant, had coolant changed and refilled. Corrected problem. |
| 213000 mi US $850 |
replaced right side converter |
| 236000 mi US $100 |
Had to replace 2 ignition coils and spark plugs |
| 89900 mi US $450 |
Camshaft sensor harness shorted out camshaft sensors. |
| 38000 mi | Recall to replace electric fan sensor |
| 60900 mi US $100 |
Had VVT solenoid sensor replaced. |
| 136000 mi US $2000 |
Coolant Leaks |
| 154000 mi US $600 |
intake hose belts |
| 66000 mi US $65 |
Service engine soon light came on - took it to my mechanic to check, light indicated that there may be a leak in the fuel system. Did smoke test - no faults found, reset and no problem since. |
| 67000 mi | Oil sensor and gasket sensor needed to be replaced. Cost $250. |
| 77000 mi | minor leak in fuel line - possible due to fuel cap. Will monitor and if same problem occurs, fuel cap check for leaks and smoke to see if leak in th line itself. |
| 78000 mi US $125 |
Vehicle was dripping oil. Discovered a few months ago, but told by dealer it was OK. Rediscovered during an check engine light - which was due to gas cap leak and not to the oil issue. New oil sensor gasket installed + oil change. |
| 91500 mi US $150 |
Leak in emissions system |
| 99000 mi US $200 |
Thermostat broke causing radiator to overheat and crack. Cam Sensor cause by engine overheat; probably could have avoided this if I'd had the car towed earlier. |
| 4800 mi | Oil leak. Fixed by dealer in one week in shop. |
| 170400 mi US $150 |
Oil leak around valve cover gasket |
| 110000 mi US $600 |
radiator replacement |
| 84000 mi US $500 |
Replaced coolant temp sensor, camshaft position sensor, fuel injectors, valve cover gaskets |
2006 Infiniti M 4dr Sedan
280-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 40000 mi | Some kind of temperature valve for engine cooling replaced. |
| 77000 mi US $429 |
Replaced 2 belts |
| 103000 mi US $800 |
Valve Gaskets Leaking-When opened found plastic valve cover lost metal plug-leaking oil into a cylinder. Replaced both valve covers (from E-Bay OEM parts 1/2 Cost from dealer) and gaskets. The Infiniti dealer wanted $1400.00 just to replace the valve gaskets. Gawd knows what they'd have charged with the defective valve cover found if my neighborhood mechanic hadn't have done it. Dealer prices are nutz!!! |
| 114740 mi C $1200 |
muffler disconnected from exhaust |
| 132680 mi C $130 |
reweld a separated flange in the exhaust system |
| 133300 mi C $123 |
Exhaust broke in another spot, at front flanges. Pins remained and were effective to keep the exhaust from falling to the ground, but noisy. Exhaust welded. |
| 100000 mi | 2 oxygen sensors failed entire exhaust system rusted out |
| 48000 mi | "Valve covers leaking. Defective valve covers. Replaced valve covers." "M35/45 fan ctrl mdl ITB08-P8227" |
| 10000 mi | Car went into limp mode twice. Check engine light came on. Replaced sensor. |
| 174000 mi US $1200 |
Entire exhaust replaced |
| 13000 mi | Failed mass air flow meter, car ran very rough at idle, occasionally stalled when being driven |
| 21000 mi | Car ran very rough for approx 4 minutes. Car was shut off, restarted and it ran fine. Dealer could not find the problem |
| 74000 mi US $150 |
drive belt tensioner weak, replaced by dealer |
| 159000 mi US $400 |
Exhaust - Y-Pipe heat shield was rattling/loose ( removed them) Replaced Y-Pipe connectors |
| 200000 mi US $800 |
replaced engine |
| 59000 mi US $100 |
Exhaust pipe broken at rear resonator. Pipes cut and new section welded into place. |
| 78300 mi US $568 |
Exhaust heat shield broken, rattling |
| 80900 mi US $265 |
Leaking exhaust pipe at Y connector and near muffler. Shop welded repairs without replacing any parts. |
| 87000 mi US $410 |
Exhaust pipe leaking, rusted through. Replacement part not available, shop crafted a new piece & welded into place. |
| 101420 mi US $370 |
Cam position sensor failed. Both sensors replaced. |
| 93000 mi US $200 |
Thermostat failed and car started to overheat. Replaced part and added coolant |
| 33651 mi | Replaced thermostat |
| 59885 mi US $1006 |
Thermostat replacment |
| 105000 mi US $443 |
Replaced defective camshaft position sensor |
| 61000 mi | Valve seal |
| 163380 mi C $1200 |
Replace blocked heater core. |
| 122000 mi US $300 |
Oil was leaking from filter area, had to replace the part that the oil filter attaches to to stop the leak. |
| 135000 mi US $800 |
Serpentine belt replaced, shop said it was cracked pretty bad (although don't they always say that!) |
| 54560 mi C $200 |
Crank sensor was replaced |
| 59000 mi | Radio, Navigation, climate controls, and screen would lock up. Bluetooth module was replaced. The 2-3 shift was harsh and the TCM was reprogrammed. |
| 174500 mi US $80 |
It was turning off while driving, the mechanic told me it was the crank shaft sensor. Problem fixed. |
| 62000 mi | Mass Air Flow Sensor on throttle body malfunctioned. |
| 66200 mi US $800 |
Replaced muffler. No aftermarket parts available |
| 76200 mi US $800 |
Had to replace muffler |
2006 Infiniti M 4-door
8-cylinder automatic 2WD
| 15000 mi | the engine, on start up, sounded like a diesel. it rattled, clanked, and sounded like there was no oil in the car. i quickly turned off the car and checked the oil. i tried again with the same result. because i thought the engine was starved of oil... |
2006 Infiniti M 4-door
6-cylinder automatic 2WD
| 32000 mi | Two of the four tire pressure sensors failed to read the current tire psi. A "*" appeared on the LCD for the two rear tires. Dealer recalibrated the sensors during the 30K service appointment. Sensors have since been fine to date. |
2003 Infiniti M 4dr Sedan
340-horsepower 4.5L V8 5-speed shiftable automatic RWD
| 60000 mi US $250 |
o2 sensor replaced |
See TrueDelta's information for all Infiniti models.
