| 1 | 0 | 3 | 4 | 3 | 4 |
Infiniti FX repairs by problem area
Engine (33%)
Transmission and Drivetrain (4%)
Brakes and Traction Control (7%)
Suspension and Steering (19%)
Electrical and Air Conditioning (23%)
Paint, Rust, Leaks, Rattles, and Trim (8%)
Other (6%)
Chart based on 450 repairs.
Infiniti FX engine repair cost distribution
$2500+ (1%)
$1000 - $2499 (15%)
$500 - $999 (20%)
$100 - $499 (38%)
< $100 (26%)
Chart based on 136 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2013 Infiniti FX 4dr SUV
390-horsepower 5.0L V8 7-speed shiftable automatic AWD
| 105000 mi US $400 |
Replaced spark plugs. Work is abnormally expensive due to the traditionally five hours of work required on the engine. It’s a big engine in a tight space with a lot to remove. |
| 103000 mi US $6500 |
Replaced drivers side catalytic converter. |
| 110000 mi US $2300 |
Radiator was replaced. |
2012 Infiniti FX 4dr SUV
390-horsepower 5.0L V8 7-speed shiftable automatic AWD
| 147000 mi US $700 |
Radiator was leaking. Replaced radiator, hoses, thermostat and water pump. |
2012 Infiniti FX 4dr SUV
303-horsepower 3.5L V6 7-speed shiftable automatic AWD
| 45260 mi C $150 |
Apparently the "check engine light" came on because of a carbon buildup in the intake which was considered "maintenance issue" not covered under warranty. I declined the repair quoted $350. Paid $150 diagnostic fee. |
2010 Infiniti FX 4dr SUV
390-horsepower 5.0L V8 7-speed shiftable automatic AWD
| 27100 mi | Dealer accidentally left off bottom protective engine cover on last visit. Replaced free of charge. |
2010 Infiniti FX 4dr SUV
316-horsepower 3.7L V6 7-speed shiftable automatic AWD
| 59220 mi $500 |
The lambda probe before the catalytic converter had to be replaced, but the old one got out with a round piece of metal which was supposed to remain glued on the exhaust pipe. |
| 96260 mi $4000 |
Crack of the cylinder cover left bank |
| 109120 mi $50 |
Rough idling of the engine. MAP SENSOR-1.44 V A/F ALPHA-B1- 86% A/F ALPHA-B1- 97% INJ PULSE-B1- 2.6 ms INJ PULSE-B2- 2.9 ms A/F ADJ- B1- -0.01 A/F ADJ- B2- +0.020 All the other sensors readings-OK. No DTC. After a long investigation and checks- one of the PCV valves found stuck in open position. Both PCV valves replaced by new ones. Engine idling smoothly. |
2010 Infiniti FX 4dr SUV
303-horsepower 3.5L V6 7-speed shiftable automatic AWD
| 93000 mi US $1300 |
Replaced radiator |
2009 Infiniti FX 4dr SUV
303-horsepower 3.5L V6 7-speed shiftable automatic RWD
| 22750 mi | the fuel gauge did not read full after filling up at the pump and the pump clicked automatically |
2009 Infiniti FX 4dr SUV
303-horsepower 3.5L V6 7-speed shiftable automatic AWD
| 103000 mi US $850 |
Radiator developed a small leak |
| 128000 mi US $134 |
fuel tank vent valve |
2008 Infiniti FX 4dr SUV
275-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 93000 mi US $150 |
A/C would work intermittently and car eventually started overheating. Using the Nissan/Infiniti self-diagnostic mode, I saw that both fans would only activate if I spun it by hand. I found a very similar issue on youtube with an Nissan Altima's fans so I replaced the Radiator Fan Assembly with an aftermarket one (plug-and-play) for about $160 where the OEM ran around $500+ . There was an extended warranty issued by Infiniti for the fans, however, we exceeded the time warranty but were within the mileage warranty. Unfortunately Infiniti Corporate and our local dealer did not want to honor it this time (we're they have in the past). If a extended warranty is issued, obviously the part is faultly. |
| 50000 mi | Fuel pump replaced under warranty. |
| 51700 mi US $200 |
Left engine mount failed. |
2008 Infiniti FX 4dr SUV
275-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 102000 mi US $790 |
Muffler system replaced |
| 87900 mi US $300 |
Fuel Injection cleaning |
| 122000 mi US $70 |
Replaced evaporation emissions canister to fix check engine light. |
2007 Infiniti FX 4dr SUV
275-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 24984 mi | Warranty Work when purchased Used from dealer: error code P0507 throttle body online #5 was replaced bad front brake pulsation - resurfaced front brakes and new pads |
2007 Infiniti FX 4dr SUV
275-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 14117 mi | Replace defective gas cap |
| 86000 mi US $145 |
A warning created by the gas cap not fitting properly |
| 25482 mi C $1200 |
3 months off of warranty. Starting problems. $1200 fix. Problem not rectified. Brought in a week later for different fix (free). Second repair did not solve issues. Tire of lomng trip accross town and leaving with dealer. Will try again lat |
2006 Infiniti FX 4dr SUV
320-horsepower 4.5L V8 5-speed shiftable automatic AWD
| 92000 mi US $145 |
Eval purge valve replaced |
| 130000 mi US $3 |
A vacuum line cracked causing the variable length intake runners to be stuck in high RPM mode, causing a stumble at 3,500 RPM and low power below 4K |
| 142000 mi US $250 |
Engine fan developed cracks and was coming apart |
| 148000 mi US $200 |
Passenger side valve cover gasket. |
| 152000 mi US $250 |
Drivers side valve cover leak |
| 163000 mi US $300 |
Two idler pulleys - one was squeaky. |
| 204000 mi US $400 |
O2 sensors |
2006 Infiniti FX 4dr SUV
280-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 53940 mi | We had a radiator fan replaced as one had stopped working. |
| 85000 mi US $150 |
Replaced a bad o2 sensor |
| 92000 mi US $1450 |
Replacing leaking valve cover gaskets, valve covers, and another oil gasket at the bottom |
2006 Infiniti FX 4dr SUV
280-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 81000 mi US $750 |
Dealer replaced bad muffler |
| 88300 mi US $1100 |
Exhaust flange rusted out. Replaced with straight pipe. Common in rust belt states. |
| 91200 mi US $500 |
P0345 camshaft sensor fault. Replaced with third party part |
| 112000 mi US $300 |
Illinois winters rusted heat shield clamps out, and added some holes to the exhaust pipe. Removed shields and welded pipe back together. |
| 79000 mi US $60 |
exhaust leak at union in pipe between resonator and muffler. muffler shop cut out the leaking joint and welded in a piece of pipe. |
| 102000 mi US $150 |
engine immobilzer shutting down ignition - bad wire in steering column |
| 107000 mi | mounts for heat shields on exhaust rusted through and caused the loose shild to rattle while engine ran. Muffler shop cut the loose shields off and rattle stopped |
| 129000 mi US $100 |
oil cooler seal replaced |
| 118000 mi US $1000 |
Exhaust rusted through at muffler inlet weld |
| 129000 mi US $1200 |
Radiator had leak. Dealer replaced radiator, cap, and thermostat. |
| 129000 mi | engine overheating at stoplights Shop found indication of a leak in the heads (hydrocarbons in coolant). Said the engine has so many miles on it, it would be better to replace the engine for $10,000. |
| 109000 mi US $1400 |
O2 sensor |
| 109300 mi US $1600 |
Spark plugs and valve cover gaskets A second O2 sensor |
| 109000 mi US $500 |
Radiator and thermostat. |
| 112000 mi US $100 |
Replaced exhaust gasket that was rusted |
2005 Infiniti FX 4dr SUV
315-horsepower 4.5L V8 5-speed shiftable automatic AWD
| 38440 mi €60 |
Brumming exhaust |
2005 Infiniti FX 4dr SUV
280-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 109000 mi US $995 |
three sensors had to be replaced plus I needed rear brakes |
| 153000 mi | oil pump seal leaking as well as oil pan. |
| 97000 mi US $800 |
Exhaust manifold leaking |
| 107000 mi US $900 |
Valve cover gasket replacement |
2005 Infiniti FX 4dr SUV
280-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 73300 mi US $59 |
Belt squeak on start up. Replaced the belts myself for $59 and one hour of my time. |
| 83000 mi US $115 |
Exhaust system had begun leaking at the rear coupling. |
| 71400 mi US $1400 |
Muffler Engine Sensor broken |
| 133000 mi US $1150 |
three ignition coils replaced, air intake replaced |
| 189000 mi US $280 |
Exhaust |
| 26000 mi | Warranty work, replaced squeaky belt. |
| 143000 mi | Mass airlfow sensor replacement |
| 84000 mi US $500 |
throttle body replacement |
| 78000 mi US $550 |
Replaced entire throttle body because the throttle position sensor died. Unable to replace just the sensor. |
| 91000 mi US $10 |
Flange on rear muffler that attaches to tailpipe rusted out and broke. I removed muffler and welded flange back on, then reinstalled muffler with new gasket. This car is not short tripped, no excuse for such an expensive car to have this problem! |
| 99000 mi US $200 |
cracked radiator hoses |
| 92500 mi US $77 |
Exhaust noise caused by rusty exhaust. The auto shop cut out the rusted part of the exhaust (mid-pipe?) and welded in another piece of metal, and the problem was solved. |
| 127300 mi US $650 |
Failed valve cover gasket leaked oil |
2004 Infiniti FX 4dr SUV
315-horsepower 4.5L V8 5-speed shiftable automatic AWD
| 81060 mi | Idle RPM @ 800 |
| 141700 mi US $550 |
Leaking valve covers |
2004 Infiniti FX 4dr SUV
280-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 198000 mi US $860 |
Had a couple of misfires and valve cover leak. When replacing valve cover gaskets, plugs, pcv and coils x6 found oil in one tube in each valve cover. Replaced valve covers also. |
| 90800 mi | Lower radiator hose replacement, coolant, flush and cleaning; new radiator cap |
| 103000 mi US $20 |
Dirty throttle body |
| 113400 mi US $550 |
Radiator cracked and needed to be replaced. |
| 112000 mi | Throttle body was dirty and caused car to idle rough and brought up a check engine light. Removed throttle body and intake plenum and cleaned thoroughly with carburetor cleaner. Idle has smoothed out and CEL went away after a few days. |
| 115100 mi | Replacement radiator developed a pinhole leak and dumped all of the coolant. |
| 118000 mi | Cam shaft and crank sensors replaced. Engine would stall randomly. |
| 88000 mi | Although the car was well maintained, the engine is blown with 88,000 miles |
2004 Infiniti FX 4dr SUV
280-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 65100 mi | Rattle on cold start - traced to cracked / loose heat shields on catalytic converters. |
| 80600 mi | heat shields on catalytic converters rusted, loose and vibrating, creating noise on cold start |
| 134000 mi | Car was hard to start in the morning. Cleaned throttle body and the car started as usual. It is important to have the ECU relearn the idle otherwise the Check Engine Light will come on. Procedure can be found here http://forums.nicoclub.com/help-relear |
| 136000 mi US $125 |
After cleaning the throttle body, I was not able to make the ECU "relearn" the idle. Had to take it to a mechanic who used Infiniti computer to reset the idle speed. |
| 182000 mi US $50 |
Low on oil |
| 104000 mi US $300 |
Cracked Radiator |
| 152600 mi US $300 |
Throttle body has required replacement. Also, automatic door locks do not work on 3 doors. |
| 68000 mi US $533 |
I needed a new muffler. There was a crack going all the way around the flange. |
| 95000 mi US $275 |
Engine occasionally had trouble starting. Check engine light came on. Had left bank cylinder module replaced at dealer. |
| 97000 mi US $700 |
Muffler y-pipe rusty, and there was a small hole in the muffler. Y pipe was sautered and hole was patched. This worked well. To replace the entire exhaust system would cost almost 1300 dollars, and I wasn't willing to do that repair. |
| 70000 mi | Car was burning excessive ammounts of oil, more than a quart every 1000 miles. |
| 50000 mi | Service Engine Soon light came on. Emission system leak captured by computer. Dealer could not replicate or find a leak, but all fittings/sensors checked/tightened and warning light reset @ no charge. No recurrence since. |
| 71000 mi US $309 |
Hydraulic rear differential support bushing leaking. Replaced rear cross member to resolve. |
| 82000 mi US $158 |
Oil cooler seal leaking-discovered during routine maintenance service. Slight leak. Not noticed in prior oil change service, so assumed the leak developed between 78K and 82K miles. Oil cooler O-ring seal replaced. Problem solved. |
| 87700 mi US $100 |
Mechanic working on other problem observed that the hydraulic motor mounts were leaking hydraulic fluid. Mounts were replaced under extended warranty. |
| 88700 mi US $520 |
Accelerator position sensor suddenly quit working and had to be replaced. Dealer had to keep vehicle overnight until part could be delivered via overnight service. |
| 92300 mi US $200 |
Radiator shroud cracked & loosened; dislodging cold air intake tube. CAI tube rubbed against AC compressor, making noise. Shroud & entire fan/motor assembly replaced under extended warranty. |
| 221000 mi US $85 |
SEL light was on after engine backfired. Code indicated 2nd O2 sensor issue. shop added Cataclean, told me to run for a week. Light was reset and has been off since |
| 221000 mi US $350 |
muffler was rusting out and had a leak. Repalced muffler and tail pipes |
| 251000 mi US $1000 |
Replaced full exhaust from converter back |
| 256000 mi US $1600 |
Had to replace valve cover gasket, manifolds and coils |
| 90000 mi US $1200 |
Replaced leaky valve covers (2) |
| 95000 mi US $120 |
Oil leak - replaced oil pressure hose |
| 57000 mi US $2000 |
Leaking valve covers needed replacing (included spark plugs, several gaskets and two "cover assy - valve roc" which were $254 and $243). |
| 64300 mi US $1208 |
Replaced heated oxygen sensor. Also had power steering flushed, fuel injectors serviced, leaky dipstick replaced, brakes flushed, air filter replaced, routine oil change. Engine grounds cleaned, and redundant ground installed. |
| 65000 mi US $647 |
Service Engine light ->Rear oxygen sensor not working. Took a while to track down, then replaced rear heated oxygen sensor, shop expenses and tax->total $646.90. |
| 79000 mi US $759 |
Check engine light was on. Engine grounds cleaned, 5 grounding bolts replaced. |
| 80000 mi US $327 |
Serpentine belts replaced. |
| 92200 mi US $130 |
Replaced leaky oil seal gasket. |
| 277000 mi US $1098 |
engine not cranking, transmission indicator blank, reverse lights do not come on. |
| 143000 mi US $100 |
oxygen sensor |
| 153000 mi US $125 |
Belts and pulleys |
| 53200 mi US $100 |
Exhaust leak. |
| 108180 mi C $205 |
Connection between muffler and Mid-Pipe in exhaust rusted through and needed replacement. |
| 110980 mi C $60 |
Belts were squealing badly. Replaced belts, did not resolve. Removed tensioner, found crack washer preventing proper rotation, removed washer and replaced. Problem resolved. |
| 115400 mi C $100 |
Oil cooler behind oil filter leaked from hose connection. Connection needed new, tighter hose clamps. Included oil change with repair. |
| 117380 mi C $10 |
Oil cooler was leaking behind oil filter. Replaced faulty (incorrectly installed by previous owner) crush washer. Leak resolved. |
2003 Infiniti FX 4dr SUV
315-horsepower 4.5L V8 5-speed shiftable automatic AWD
| 168000 mi US $30 |
Car exhibited brief engine roughness, later the Service Engine Soon light was lit. After stopping engine, the car would not start, had to be towed home. Error code indicated bad camshaft position sensor, which I replaced the next day |
| 222000 mi US $400 |
Replaced leaking radiator. Proactively replaced water pump, thermostat & radiator hoses, coolant. |
| 99000 mi US $350 |
Camshaft sensor needed to be replaced |
| 108000 mi US $450 |
Cam Shaft sensor replaced |
| 50000 mi US $250 |
Cleaned fuel injectors due to gunk build up - cause misfiring or not all 8 cylinders working. |
| 140000 mi US $515 |
sensor replaced, battery replaced |
| 93000 mi US $260 |
Muffler developed rust and needed replacement |
| 100000 mi US $360 |
One cylinder lost compression. Dealer tried carbon treatments, but they did not work. Told that only remedy was to replace engine for cost of $8,600. I passed, choosing to trade it in on another new vehicle. |
| 42600 mi US $1300 |
Replace main engine pulley |
2003 Infiniti FX 4dr SUV
280-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 130000 mi US $1600 |
Sensors and coils had to be replaced |
| 150000 mi US $350 |
replaced both valve cover gaskets (leaking heavily), replaced coil and spark plugs. Car had awful miss in cylinder 3, miss corrected, but now idle is between 900 and 1200 rpm. |
| 153000 mi US $150 |
Replaced grounding kit after coils and plugs. |
| 161900 mi US $100 |
spark plug gasket leaking. Pull valve cover and seal. |
| 182500 mi | Exhaust heat shield strap rusted thru causing rattle. |
| 232000 mi US $325 |
Leaking from valve covers |
| 259000 mi US $150 |
Replace water pump and thermostat. Latter probably failed first. |
| 131700 mi US $250 |
Oil Pan gasket leak, Oil Cooler o-ring leak Oil leaked into coilover and spark plug from Valve cover |
| 172000 mi US $130 |
Put washer in oil plug stopping leak |
| 196000 mi US $750 |
radiator leaking - replaced radiator spark coil failed -replaced |
2003 Infiniti FX 4dr SUV
280-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 150000 mi US $50 |
Cam sensor |
| 101500 mi US $850 |
Replace radiator (hole in it) replace thermostat replace upper and lower rad hoses Replace radiator (hole in it) replace thermostat replace upper and lower rad hoses |
| 126000 mi US $1350 |
Replace serpentine belt tensioner. leaking "O" ring at oil cooler housing. It was only a small leak. |
| 169000 mi US $210 |
Cam shaft positioning sensor went bad resulting in VDC, Check Engine and traction control light to come on along with vehicle turning off while driving. |
| 182000 mi US $600 |
Head Gaskets needed replacing - leaking oil |
| 186500 mi US $500 |
Coolant Hoses, Induction service, transfer case fluid change, gaskets, oil change, overall inspection. |
| 193300 mi US $750 |
Main gasket seal |
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