| 1 | 0 | 3 | 4 | 3 | 4 |
2003 Infiniti G repairs by problem area
Engine (29%)
Transmission and Drivetrain (4%)
Brakes and Traction Control (3%)
Suspension and Steering (15%)
Electrical and Air Conditioning (37%)
Paint, Rust, Leaks, Rattles, and Trim (5%)
Other (6%)
Chart based on 411 repairs.
2003 Infiniti G engine repair cost distribution
$2500+ (3%)
$1000 - $2499 (12%)
$500 - $999 (22%)
$100 - $499 (41%)
< $100 (22%)
Chart based on 115 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2003 Infiniti G
Engine not specified
| 175000 mi US $260 |
Oil leak repaired and cleaned - Engine oil cooler replaced. |
2003 Infiniti G 4dr Sedan
280-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 88000 mi US $400 |
A throttle sensor went bad. Part cost $350. Total after tax and labor was barely $400. |
| 96100 mi | The car was beginning to stall. |
2003 Infiniti G 4dr Sedan
280-horsepower 3.5L V6 5-speed shiftable automatic AWD
| 89000 mi US $450 |
Leaking oil cooler gasket-- replaced gasket and hose. |
| 104000 mi US $600 |
oil leaking from valve cover gaskets. gaskets replaced. |
2003 Infiniti G 4dr Sedan
260-horsepower 3.5L V6 6-speed manual RWD
| 75020 mi C $20 |
Intermittent no-start diagnosed by owner as faulty clutch pedal interlock switch. Verified by wire jumper. Switch replaced by owner. |
| 175300 mi US $350 |
Radiator leak after I have gotten the car detailed, they washed the engine, and it stated leaking. Nothing huge. |
| 56000 mi US $530 |
cam sensor failed - bank 1 replaced cam sensor both banks, banks 1 and 2 |
| 59000 mi US $558 |
Replaced muffler and resonator. |
2003 Infiniti G 4dr Sedan
260-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 191000 mi US $30 |
Cam position sensor driver |
| 97960 mi C $1300 |
Water pump and belts. |
| 77000 mi US $1000 |
Car overheated, later noticed that there was coolant on garage floor. So strange. Engine coolant leak. |
| 65000 mi US $630 |
Cooling fan clutch remained engaged at all times, did not disengage. |
| 77000 mi US $150 |
Check engine light came on. Code was problem with cam sensor. Cleared error, changed oil. |
| 107000 mi US $369 |
replace belts |
| 132200 mi US $800 |
Car started stalling. VAT sensor needed replaced as well as some wear and tear items |
| 156500 mi US $1000 |
My engine is burning oil. Had header seals fixed but problem wasn't solved. They said they can't do anything to fix it. I put in about a quart of oil every 3,000 miles. |
| 162000 mi US $450 |
Broken radiator and worn upper cooling hose. |
| 164000 mi US $850 |
Had leak on back of engine due to faulty seal. Caused me to fill coolant every two weeks. Work required the transmission to be removed to get to part of engine with leak. |
| 113000 mi US $100 |
Replaced both cam position sensors myself on a weekend. Had stalled twice while idling and thrown a code for one cam position sensor. While I had the intake manifold off I replaced both sensors. |
| 123900 mi US $114 |
Replace accessory belts. |
| 127500 mi US $300 |
Hydraulic coupling for cooling fan failed. |
| 144460 mi C $150 |
Belt was badly worn, very noisy at time, I tought it was the the clutch bearing for the AC, no just the belt and bent tensioner bolt. Muffler brackets were broken. I had them welded, to cut vibration noise at idle! |
| 140000 mi US $800 |
Radiator Leak. The radiator was replaced |
| 128340 mi C $500 |
Exhaust system |
| 98000 mi US $50 |
belt adjustment |
| 98200 mi | Replace Belt |
| 114000 mi US $330 |
Cracked radiator, needed new one. |
| 116700 mi US $150 |
#4 cylinder coil loose, reconnected. |
| 145200 mi US $340 |
Radiator had become partially clogged causing engine fan to run constantly and during acceleration sounding like a semi-truck. Car engine overheated twice. |
| 114500 mi | Engine light on. Code had tripped, but was running within specs. It appears to trip the code occasionally when passing on the freeway (accelerating quickly from 65 to 85+) Has occurred 3 times. Checked but nothing replaced. |
| 116200 mi US $500 |
O2 sensor replaced |
| 125200 mi US $1500 |
Camshaft sensors |
| 139000 mi US $1400 |
Oil leak repair |
| 125800 mi US $100 |
Ac compressor belt broke, replaced all belts |
| 130000 mi US $30 |
Exhaust pipe near muffler was damaged, new pipe was welded in |
| 158000 mi US $300 |
Radiator started leaking |
| 68820 mi C $350 |
Valve cover gasket |
| 117800 mi C $230 |
Radiator replaced, pressure test done |
| 134000 mi US $1700 |
Crank and cam sensors were replaced. New valve covers. |
| 188800 mi US $828 |
EVAP Vent valve and canister |
| 49000 mi | Replaced a bad VVT solenoid at dealer's expense. |
| 66960 mi C $425 |
Fuel pump failiure. Replaced defective part with new part. ALl work carried out at local dealership. |
| 80000 mi | Heat sheld on exhaust pipes was rusted out causing severe rattling. Owner repaired |
| 122000 mi US $155 |
Exhaust leak at flange between muffler and resonator |
| 122000 mi US $1000 |
exhaust rusted loose, also oil in spark plug wells. |
| 123000 mi US $1000 |
car would not start |
| 120280 mi C $800 |
Was working for a dealer and had good discounts on repairs and parts. Bought this car knowing it needed some work: Repair oil leaks and any collateral damage resulting from constantly burning and leaking oil. Replace valve cover gaskets due to leak, both banks. Defective valve cover creating excessive oil consumption, mechanic did a no-promises repair for free while it was off and resealed with silicone, has not shown signs of leaking since. Oil cooler o-ring leak. Replace spark plugs, assumed damaged from burning oil they were also easily accessible while other work was being performed. Other maintenance items done at this time also. |
| 173300 mi US $320 |
Replaced lower oil pan gasket. |
| 194000 mi US $422 |
Replaced both cam position sensors and crank position sensor. |
| 76880 mi | AMS very expensive to repair - part alone $1500! |
| 69720 mi US $500 |
Replaced throttle body. |
| 105000 mi US $100 |
Replaced camshaft position sensor 1. |
| 112712 mi US $100 |
Replaced camshaft position sensor 2. |
| 96000 mi US $360 |
Electronic Fuel Throttle required replacement. |
| 125000 mi US $275 |
Check engine triggered visit to dealer for diagnosis. Diagnosis at dealer revealed thermostat failure. Replaced thermostat at dealer. |
| 127000 mi US $1000 |
Camshaft Position Sensors |
| 112000 mi US $120 |
Cracked radiator, replaced radiator with oem spec aftermarket radiator. |
| 140000 mi US $170 |
Radiator gasket started leaking. Replaced Radiator with aftermarket (KOYO) radiator. |
| 101000 mi | Gas cap replaced. |
| 110360 mi C $600 |
Squealing belt pulleys. Dealer replaced. |
| 130000 mi US $750 |
Service engine light was on. The dealer told me to change the engine. |
| 130000 mi | Diagnostic: Oil leakage to spark plug (out of cylinder). The entire valve cover has to be replaced to fix the oil seal atop the spark plug tube. Valve covers $(330+). Specially and cleverly designed to avoid any home or machine shop repair. |
| 131000 mi | VDC OFF, SLIP and SES lights turned on. Car in fail-safe mode(will not rev beyond 2300rpms) Trouble Codes: P1122,P0102,P0223,P1224 P0221. Roughly Mass Air Flow sensor and TPS failure. VDC OFF, SLIP and SES lights turned on. Car in fail-safe mode (will not rev beyond 2300rpms) Trouble Codes: P1122, P0102, P0223, P1224, P0221. Mass Air Flow sensor and TPS failure. |
| 137000 mi US $90 |
Mass Air Flow Sensor defective. Replaced with one for the Maxima (2001-part number: 22680-2Y001) which fits the G35 (part number: 22680-AM600) with a minor adjustment. |
| 137000 mi US $220 |
Valve cover gasket replacement. Idler pulley bearing replacement. (Alternator side) |
| 90000 mi US $550 |
Radiator blew and was replaced |
| 103200 mi | A/C Drive Belt partial failure. Threw a chunk, but still functioning. |
| 108000 mi | factory exhaust is shelled. Will replace w/ aftermarket for $800 plus install |
| 110000 mi US $100 |
Installed NGK Iridium plugs. Stock plugs fine, but worn. Left rear (driver) plug was "loose" but fine. Valve cover leaking but not enough to justify R and R. |
| 110000 mi US $500 |
Installed a Megan SS exhaust midpipe and muffler. Megan is louder than stock. Aftermarket SS is not as sturdy as stock. Stock sys favors midrange. Megan favors top end. Recommend repair of stock (sys was rotted out at mid/rear joint). |
| 137000 mi US $100 |
Replaced Engine Oil Cooler Seal |
| 104000 mi US $600 |
Replace knock sensor |
2003 Infiniti G 4-door
6-cylinder automatic 2WD
| 89280 mi C $500 |
fuel damper. |
| 125000 mi US $900 |
Replaced sensors for camshaft and crankshaft |
2003 Infiniti G 2dr Coupe
280-horsepower 3.5L V6 6-speed manual RWD
| 113460 mi C $200 |
Bad Ignition Coil. Replaced. Caused P0300 code. |
| 9300 mi C $10000 |
Engine Rebuild *NOT COVERED UNDER WARRANTY CALIM DENIED!!! |
| 15500 mi C $3500 |
Engine over heating New Rad and Tstat installed |
| 16120 mi C $4500 |
Head Gasket Repair |
| 102300 mi C $301 |
replace serpentine belt |
| 82400 mi US $500 |
Fuel injector jammed open. Replaced with new injector, but problem remained. Required reprogramming of ECU. |
| 112000 mi US $80 |
Malfunctioning camshaft position sensor. Replaced. |
| 113000 mi US $560 |
Leaking valve cover gasket; replaced. |
| 115300 mi US $70 |
Camshaft position sensor failed; replaced. |
| 122000 mi US $230 |
Malfunctioning ignition coil. |
| 79000 mi US $145 |
Oil seal replaced |
| 107000 mi US $409 |
CAM sensors replaced |
| 52000 mi US $100 |
Check engine light - code indicated fuel(?) - reset check light - picked up car and check engine light came back on - dealer reran code check which indicated O2 sensor. Scheduling return visit to replace. |
| 53200 mi | replaced O2 sensor |
| 96100 mi C $535 |
Throttle body and Accelerator pedal position sensor |
| 51000 mi | Throttle position sensor and throttle body were replaced. |
| 107000 mi US $1900 |
Oil leak around valve cover. Replaced gasket |
| 106000 mi US $175 |
Replaced spark plugs, changed oil and replaced intake manifold. |
| 124000 mi US $1200 |
Replaced clutch and flywheel |
| 87000 mi US $10500 |
Exhaust Camshaft was worn |
| 88000 mi US $1000 |
Radiator leak on the seams |
| 180000 mi US $120 |
Replaced T-stat, this was the cause of the car running "hot". |
2003 Infiniti G 2dr Coupe
280-horsepower 3.5L V6 5-speed shiftable automatic RWD
| 61000 mi | Oil pooling on the spark plug at cylinder #6 when we replaced the spark plugs. Valve cover and gasket replaced under warranty. |
| 55000 mi US $800 |
Engine oil leak required new O-ring. Replaced brake pads and rotors. |
| 86200 mi US $240 |
Had the cam position sensor for the driver side cam bank fail and make the car run poorly and stall occasionally. |
| 150000 mi | Bad cam sensor. It would go dead randomly and maybe start back up such as sitting at a drive-through and just die maybe crank it back up maybe not. Car started fine for two weeks following this repair. |
| 150000 mi US $375 |
Bad crankshaft sensor. |
| 63000 mi US $400 |
Shop finally ended up replacing inner bearings (2 of them) in the small idler/guide pulley between the drive/crank pulley and the alternator pulley. Odd design on the part of Nissan but the shop finally got rid of the squeal. |
| 64000 mi | Took car back to the shop and the small idler pulley was readjusted and the squeal went away. |
| 125000 mi | Started burning a lot of oil pretty quickly. Sold at a loss. |
| 132200 mi US $500 |
throttle body. |
| 74000 mi | Valve timing solenoid bad and car ran hot when sold. |
| 65000 mi US $150 |
coolant leak |
| 73000 mi US $1100 |
Valve covers and gaskets. |
| 85000 mi US $280 |
replaced sensors |
| 70300 mi US $100 |
Check engine error code: Evaporative Emission Control System Leak Detected (very small leak), Replaced gas cap. |
| 81200 mi US $1300 |
Engine running rough with check engine light. Replaced ignition coils and spark plugs. |
| 89000 mi US $45 |
Engine running rough with CEL. Replaced camshaft sensor A. |
2003 Infiniti G 2dr Coupe
260-horsepower 3.5L V6 6-speed manual RWD
| 60200 mi US $150 |
Crankshaft and camshaft position sensors. |
| 64000 mi US $400 |
Crankshaft and camshaft position sensors. Using oem parts this time. Aftermarket parts only lasted a year. |
| 16000 mi | Gas filler cap stuck. Actuator manually activated. Problem has not repeated. |
| 37000 mi US $50 |
Camshaft sensor failed. |
| 43000 mi | Engine Service Light (aka: Idiot Lamp) was on. Garage couldn't replicate / diagnose the problem .... reset the light and it has yet to come on again. |
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