Infiniti G Infiniti G

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Infiniti G Engine Problems and Repair Histories

Infiniti G repairs by problem area

Engine (23%)

Transmission and Drivetrain (7%)

Brakes and Traction Control (14%)

Suspension and Steering (13%)

Electrical and Air Conditioning (24%)

Paint, Rust, Leaks, Rattles, and Trim (14%)

Other (6%)

Chart based on 2434 repairs.

Infiniti G engine repair cost distribution

$2500+ (6%)

$1000 - $2499 (13%)

$500 - $999 (22%)

$100 - $499 (47%)

< $100 (11%)

Chart based on 314 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2013 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 7-speed shiftable automatic RWD

7300 mi Minor leak in radiator hose, clamp, replaced both hoses. 

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2013 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 7-speed shiftable automatic AWD

34000 mi The belt tensioner was reported by the dealer as being out of specification and they fixed it under warranty. I did not know anything was wrong with the car. They found it during the regular maintenance check 

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2013 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 6-speed manual RWD

18000 mi Engine replaced due to excessive oil consumption 
24700 mi 2nd engine replacement due to excessive oil consumption. Several attempts initially to address the issue before the engine was replaced for the first time. After the initial engine replacement, the excessive oil consumption continued. 

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2012 Infiniti G 4dr Sedan

218-horsepower 2.5L V6 7-speed shiftable automatic AWD

11000 mi service engine soon light came on after subzero weather. plugged in OBDII reader and found code p050e. forums state the error has to do with cold start control. ecm update fixed problem. 

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2011 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 7-speed shiftable automatic RWD

17000 mi When in stop/go traffic using manual sport shift the car shifts in a jerky mode automatically from 2nd to 1st. Looks like there's a software fix coming ... 
29000 mi Requested software upgrade to deal with engine not having immediate power coming out of a tight corner and needing speed immediately. There was a slight delay in getting engine response. 
45000 mi

US $250
The issue was with a pulley that became loose and was rattling and causing a wheezing noise during acceleration and at low speeds. 

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2011 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 7-speed shiftable automatic AWD

8960 mi car fails to start;engine fails to turnover,no electrical facilities functioning.towed to dealer 3 times and driven four times to dealer.battery and corroded electrical ground replaced.dealer still uncertain if resolved.more warranty requird 
10520 mi

C $70
DUE TO THE STARTING CONCERNS, THE HEAD LIGHT DELAY WAS SHUT OFF; HOPEFULLY, THIS WILL CONSERVE BATTERY POWER. THERE WAS NO CHARGE FOR THIS. 
13000 mi car fails to start on a 3.5 to 4.0 hour highway trip battery is dead 
13640 mi car stalled in an intersection, would not restart for 7-8 minutes. dealer found nothing. 
27900 mi fails to start even after long trips:most unreliable should the car fail to start in an area where help is not available. this is an ongoing problem since one week after the car was purchased.computer changed,the battery replaced and check 
29760 mi dealer unable to find a solution for the erratic starting 
17700 mi Coolant smell. Radiator hose and clamp were replaced. 

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2011 Infiniti G 4dr Sedan

218-horsepower 2.5L V6 7-speed shiftable automatic AWD

6660 mi Service engine soon light came out. Problem with temperature range for cold air starts. Required ECU upgrade and reprogramming. 
81000 mi

US $350
Had to replace leaky valve gaskets. 
83000 mi

US $1000
Neede to replace right banl catalytic converter 

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2010 Infiniti G

Engine not specified

13000 mi Knocking noise when engine warmed up....After much testing, engine oil changed to synthetic from factory recommended regular oil. Problem has been resolved but oil change will now cost 2x as much. 

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2010 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 7-speed shiftable automatic RWD

18000 mi Jerky and unpredictable gear changes (7-speed automatic transmission) mainly between 3rd and 4th gear. 
29300 mi

US $350
Rough shifting 

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2010 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 7-speed shiftable automatic AWD

85000 mi

US $2500
Error code P0021 -- Intake Valve Timing Control and low oil pressure. Apparently the entire valve body has to be replaced rather than just the faulty gasket (which would lower the labor to 8hrs instead of 18.5). 
89000 mi

US $300
I had a check engine light on. Error code pointed to a service bulletin saying the MAF sensor was causing it and the ECU had to be updated to fix the issue. 
100000 mi

US $280
I went in for service due to a check engine warning light being on. The issue was related to ignition timing, which required an update to the ECU. ECU update couldn't be downloaded at the dealer, which extended the time. Update performed. $280. Engine drive belt showing wear. Replaced. $180. 
16700 mi Check engine light on, gas cap replaced 
67000 mi Cleaned throttle body because there was a slight idle issue. 
61380 mi

C $65
Low battery (changed)- ECM reprogram at N/C - charge to diagnose 
57000 mi warm start stall 
85700 mi

US $60
Throttle body needed to be cleaned, car was shaking while in drive and stopped 
89000 mi

US $600
Water pump failing, was losing coolant. 
30000 mi Fuel line damper had to be replaced. Caused loud idle. 

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2010 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 6-speed manual RWD

65700 mi

US $370
Brought car in for sporadic P300, P306 codes. Dealer replaced fouled spark plug #1 & didn't find any other problems. I realized this was the reason why it was running "boggy" from low RPM. 1st noticed the "bogginess" around 30k miles 
108700 mi P0300 code persisted from 2013 repair trip. Dealer (via Infiniti Consumer Affairs) replaced: Infamous rear timing chain gasket on the VQ37VHR motor, intake cam sprocket, MAF sensor, coolant temp sensor, & H2O pump (leaking). Code persists. 
110000 mi Dealer replaced intake manifold gasket, fuel injectors, & ignition coil packs for persistent P0300 code. Code came back about 2 weeks later and appears more frequently as well. 

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2010 Infiniti G 2dr Hardtop conv.

325-horsepower 3.7L V6 7-speed shiftable automatic RWD

47500 mi warm stall, replaced throttle bodies 

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2010 Infiniti G 2dr Coupe

330-horsepower 3.7L V6 7-speed shiftable automatic RWD

2000 mi Check engine light came on after about a month (July 2010). Dealer reset it; minor technical issue, nothing wrong with engine. No problems at all since that time. 

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2009 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 7-speed shiftable automatic RWD

14700 mi I was seeing hard downshifts from 40mph to 30mph in DS mode making it almost unusable to use the sport mode. 
46000 mi Had my battery, evap valve replaced. 
18000 mi battery not charging. Dealer re-flashed ECM under warranty and fixed problem 
83000 mi

US $112
ECU had to be updated. Traveling from midwest to CI and NM, engine experienced serious misfire at low RPM. ECU updated/flashed at Nissan dealer in Santa Fe NM. Problem resolved. 
1000 mi TSB issued by Infiniti on hard downshifting and engine decel from 4th to 3rd. Dealer flashed the transmission computer and problem seems solved. Car is great otherwise, and dealership was very accomodating with loaner during the overnight work. 
74000 mi Bad catalytic converter. Warranty repair under 80k miles. 
25000 mi Overheated and stalled. Connection to radiator cooling fan had become "unplugged." 
20000 mi car would not start after sitting for just 10 minutes or so with the door open or the radio on. had to update the ecm 
7800 mi ECM replaced due to excessive noise ie, the ECM made a high pitched whine and was replaced under warranty.  
56000 mi Emission system TSB - stuck valve that drew power even when the car was turned off. Valve caused the battery to discharge so the car would not start after two days. 
48000 mi Catalytic converter plugged. Repaired under warranty. 

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2009 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 7-speed shiftable automatic AWD

34000 mi Check engine light came on. Took it in and an exhaust sensor was not functioning. Dealer had to order the part and it fixed less than a week later. 
40000 mi

US $97
Car went into "safe mode" and would let the tach get over 2,500 rpm. Was driving in Pennsylvania at the time and had to pull over turn car off. Car bucked and had no power. Very scary situation. Had to manually shift to get speed. 
33000 mi

US $85
evaporator leak repaired under warranty 
34000 mi

US $180
car would not drive over 20mph in limp mode - cleaned sensor reflashed computer 
3000 mi It was some type of control for the transmission. The car would tell me to put it in park when it already was in park. 
77000 mi Upper radiator coolant hose was leaking and had to be replaced. 
35000 mi

US $250
reflash ecm 
27000 mi Service engine soon light was on. Code was for an emissions leak. Service engine light on again. Code was for an emissions leak. 
37000 mi Engine would not rev past 2400 rpm and was accompanied by a "chugging" that made it undriveable. Dealer said they reprogrammed engine and transmission. 

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2009 Infiniti G 4dr Sedan

328-horsepower 3.7L V6 6-speed manual RWD

48000 mi Misfire CEL was coming on at cold start. Cleaning throttle bodies solved issue. 
47000 mi On one occasion, car began sputtering in 1st, 2nd and 3rd gear after a period of idling. No check engine light was displayed. Codes stored - showed faulty rear O2 sensor & cracked catalytic converter. All replaced under warranty.Issue fixed. 

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2009 Infiniti G 4-door

6-cylinder automatic 2WD

2000 mi With new 7at, having some issue while down-shifting. It seems when car is slowing down, the transmission downshifts too fast creating "engine brake/jerky" sensation. Some dealers are aware of the problem but no software update/TSB yet. 
12000 mi 7at down shifting issue, finally a tsb was released that solved problem 
41000 mi MAF defective, replaced under warranty. Unsafe to drive due to limp mode, so towed. 
49000 mi Catcon failed. 

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2009 Infiniti G 2dr Coupe

330-horsepower 3.7L V6 7-speed shiftable automatic RWD

65500 mi

US $250
Replace radiator hoses 
55300 mi

US $550
Throttle body cleaning and ECM software update. They said the main problem was software "acting up." 

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2009 Infiniti G 2dr Coupe

330-horsepower 3.7L V6 7-speed shiftable automatic AWD

24700 mi

US $500
Valve sensor in emission control system stopped working 

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2009 Infiniti G 2dr Coupe

330-horsepower 3.7L V6 6-speed manual RWD

32000 mi A speaker was emitting a 1 kHz tone whenever the car was moving. The main ECU was replaced to fix this problem. After this, a check engine code was tripped from the engine cold start system, which took several repair trips to fix. 

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2008 Infiniti G 4dr Sedan

306-horsepower 3.5L V6 6-speed manual RWD

65500 mi

US $460
Heard a tapping sound from the dash when revving above 3500 rpm. Found a TSB (ITB07-007) that applied and asked my dealer to perform it. Work involved replacing the engine coolant and flushing the heater core. 
86500 mi

US $300
Idle was dropping after a warm start. Did a throttle body cleaning. 

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2008 Infiniti G 4dr Sedan

306-horsepower 3.5L V6 5-speed shiftable automatic RWD

29000 mi Car was taken to dealer for extended crank time/intermittent no-start, and OCS problem. Could not duplicate no-start (fuel pump quit 6 miles after vehicle pickup) 
29700 mi 3 days after we picked car up at dealer, fuel pump died in the driveway. Infiniti roadside assistance towed the car and the dealer replaced the fuel pump under warranty.  
45000 mi I noticed a minor rattling sound under 20 MPH and ONLY when I took my pedal off the gas. Dealer noticed it too and upon further inspection, they deemed one of the catalytic converters at fault. They said the issue was caught early. 
62000 mi I noticed a rattle sound coming from under the car under light acceleration. I identified the right catalytic converter as the culprit. Dealer confirmed and replaced it under warranty. 
102000 mi

US $120
A three piece hose that is part of the heater core was leaking coolant behind engine. It was leaking over headers and causing a sound of rushing water under acceleration. It was a quick fix that took about an hour to swap out. 
130000 mi

US $65
A small hose from the heater to the engine block tore and I was leaking coolant. It wasnt overheating so I dropped it off at shop and a day later, the hose was replaced. 
62000 mi

US $94
Leaking coolant hose. Slow leak. 
99000 mi

US $200
NOISE IN ENGINE--REPLACED ALL BELTS AND WAS CORRECTED 
100000 mi

US $300
LOOSING COOLANT DUE TO BROKEN PART BELOW MAIN COOLING HOSE 
78740 mi replace bank 1 o2 sensor 
25000 mi Replaced fuel tank breather valve due to tank not filling up at gas station. A TSB was applied. 
87000 mi

US $3200
Replaced internal oil gasket due to low oil pressure in upper engine 
59700 mi

US $350
cracked radiator hose needed to be replaced - discovered during 60,000 mile service. 
73000 mi

US $700
Belts needed to be replaced 
60000 mi

US $57
G ride would act like it was going to shut off at startup & after coming to a complete stop from driving. 
62000 mi

US $157
Cleaned throttle body & intake. Adjusted the timing. 
65000 mi

US $160
Stalling, when exiting highway, cleaned throttle body & all emissions at dealer 
98000 mi

US $150
Car suddenly would not respond, I would step on the gas and it would not go past 5-10mph. House was approx. 1mile away. drove it slow, parked it. Next day engine light was on and drove "kind of ok" felt sluggish. needed immediate attention. Fuel injectors were clogged, that's what I was told by Dealer. I only used Premium Fuel, don't know why they were "clogged" but decided to get them cleaned out. 
64000 mi

US $300
Updated software to fix idle issue. 
69960 mi

US $200
RPM fluxuated after highway driving. Had computer re-flashed previous year..didnt fix issue. The VTC solenoid was found to be sticking, and it was repaired. 
59000 mi Catalytic converter O2 sensors bad, had that bad sulfer smell!! 
75000 mi

US $50
O2 sensor replaced, bank one! 
34000 mi leaking upper radiator hose 
46300 mi After not driving the car for a week, it developed a high and surging idle problem. Code P0507. The dealership "downloaded an ECM update" to fix the problem, covered under powertrain warranty. 
30000 mi Car would die after starting (warm engine), or RPM's would drop so low I needed to press gas to keep engine running. Dealer performed ECM reprogram per TSB ITB11-018. 
49000 mi Catalytic converters crack threw ses light. 

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2008 Infiniti G 4dr Sedan

306-horsepower 3.5L V6 5-speed shiftable automatic AWD

52000 mi

US $10
Car began stuttering and hesitating after fuel fill-up and complete stall-out occurred. Car did restart and I suspected bad fuel. Cleaned out air intakes and refilled fuel at a different station. Car is now running 100%. 
95500 mi

US $350
Heated oxygen sensor, right side, tripped the check engine light and had to be replaced. 
97000 mi

US $80
Serpentine belt tensioner had to be replaced--was causing belt misalignment and premature belt wear. 
41100 mi

C $175
Took car in for oil change, dealer said car needed rad hose replaced and coolant flushed. The vehicle had just come off warranty 4 days previously. They paid as they would not inspect the car prior to coming off warranty. 
61000 mi Ticking sound. Needed new catalytic converter. Covered by warranty. Needed 2 days for parts to arrive and install after initial consultation 
4000 mi Service Engine Soon light went on. Car ran fine. Called and went to dealer who checked car computer that indicated something with the emission system (gas cap not on right but it was). He reset the software and the car has been fine since. Took 30 min. 
133920 mi Heat shield: trailing end detatched from catalytic converter was dragging on the pavement. Re-attached. 
37000 mi

US $384
Idle was producing a loud ticking noise and I noticed the oil level was lower than it should be for a 3000 mile interval. Dealer reset the idle and did not find any issues with the car. 
68000 mi Car shuts of on hills when idiling. Reset computer. 
42500 mi Upper radiator hose leak at connection. Added sealant to upper rad hose and install additional clamp. Leak was minor but fairly common according to G owners. 
48000 mi Hairline crack in head gasket turned even more major work when a crack in the external right camshaft was discovered. New cam and related parts had to be ordered in from Japan. A 2011 G37x was provided for the full period as a loaner. 
42000 mi THROTTLE BODY failed. Car did not start. At first thought it was the battery but jump start was not successful from three different cars and a charger. 

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2008 Infiniti G 2dr Coupe

330-horsepower 3.7L V6 6-speed manual RWD

23000 mi I noticed a rattle when starting the car & asked service at the Infiniti dealer to look into it during regular service. They decided muffler was the problem, and replaced it under warranty (no cost to me). I was happy with the resolution. 
52700 mi battery was being drained by a faulty sensor in the exhaust system. Dealer replaced the sensor and the battery at no charge. Also, rotors were resurfaced due to shaking when brakes were applied (pads replaced as well). 
30000 mi Exhaust rattle, loose metal in muffler baffles. 
24500 mi Exhaust making rattle noise 
7000 mi Muffler rattling; replaced as per TSB. 
8000 mi VVEL knocking; repaired via TSB. Repair succesfully. 
2000 mi Muffler replaced. 
4000 mi Rattle in main muffler TSB. 
10000 mi The second bank of the VVEL was knocking loudly when at idle. 
2000 mi Coolant odor - No leak found - Low beams aimed low - found to be within spec - Clear bra peeling & turning black around edges - clear bra removed - passenger air bag off lamp - system working within spec. 
9000 mi Service engine soon light came on. It was determined that the problem wasn't a loose gas cap. Infiniti picked up the car, left a loaner and reset the computer management. 
4000 mi I had an exhaust/muffler that made a buzzing/rattling noise on a cold start and I got the muffler replaced by the updated part! 

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2008 Infiniti G 2dr Coupe

330-horsepower 3.7L V6 5-speed shiftable automatic RWD

19000 mi occasional intermittent surge and rough idle, Mfg bulletin 07-0488 reprogrammed ECU with latest logic. 
26000 mi Muffler inner baffle breaks free. A rattle can be heard in the muffler as the engine decelerates to idle after high rev - known problem. 
41000 mi I had a hard time filling my car with fuel. I asked the dealer and it is a known problem, the dealer replaced the gas vent valve with a newly designed one. 
47000 mi Gas tank vent not working properly. When filling tank the fuel would gurgle up the fill spout shutting off the nozzle. Radiator hoses needed replacement. 
20000 mi Replaced muffler due to rattles 
37000 mi The dealership replaced some kind of valve in the engine free of charge. 
14000 mi TSB loose baffle in muffler. 
4000 mi TSB - when slowing or breaking RPMs would surge up 400 rpms. 
24000 mi Dealer replaced battery, vent control valve and re-programed ECM under warranty 
29000 mi

US $650
Muffler started to make noise on start up. 
9300 mi NOT FIXED: Reverse squeek/squeal NOT FIXED: Engine Surges when in reverse 
15000 mi TSB on exhaust 
9000 mi Idle speed high under some conditions. Existing TSB covered this and dealer re-flash the ECU. 
11000 mi Exhaust rattle when cold. 
23000 mi Battery Drain issue finally fixed. 
34000 mi Engine would surge about 500 to 1000 rpm's after coming to a stop with foot on brake pedal. Dealer reset ECM. This also stopped the lifter rattle. 
23000 mi Switch for Sport mode in shifter assembly went bad. Shifter would no longer recognized sport mode even though shifter was in sport mode position. New shifter assembly ordered and replaced and problem fixed. 
33000 mi

US $700
rattling exhaust 
36000 mi Car consumed enough oil in 5k miles to put the car into limp mode 
44000 mi

US $125
Defective muffler replaced under warranty 
5000 mi Exhaust rattle. New muffler ordered. Scheduled to be repaired Friday 01/03/2008. 

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2008 Infiniti G 2-door

6-cylinder manual 2WD

14000 mi Exhaust muffler had to be replaced as it was making a tin can sound.  

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2008 Infiniti G 2-door

6-cylinder automatic 2WD

41000 mi baffles issue in exhaust covered by warranty 

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2007 Infiniti G

Engine not specified

8000 mi

US $50
Cruise control surge, throttle tip-in. 
73000 mi

US $1500
gaskets inside timing case were blown. 

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2007 Infiniti G 4dr Sedan

306-horsepower 3.5L V6 6-speed manual RWD

71500 mi

US $1158
Had to replace Catalytic converter. 
56500 mi

US $300
Air fuel ratio sensor needed to be replaced. 
87700 mi

US $200
Throttle bodies lost calibration, had to be reset 
42000 mi

US $250
Drive belt broke damaging AC compressor. Belt passed inspection one month prior. It should not have. Disappointed that dealer didn't spot worn belt. Could have prevented car breaking down in traffic and requiring tow. 
52000 mi

US $350
Serpentine belt snapped again. Brought back to repair shop that did original repair in June. Found Tensioner misaligned with serpentine belt. I paid for part but shop covered labor and cost of additional belt. 
91000 mi

US $350
Hoses leaking needed replacement. 
28000 mi Cruise control surge, hesitation on sharp acceleration from cruising with foot on gas. ECU re-flashed, self learning on mixture, throttle reset. 
159300 mi

US $60
The idler pulley broke down. I had to order this part (no part stores carried it) and I replaced it along with the drive belt. 

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2007 Infiniti G 4dr Sedan

306-horsepower 3.5L V6 5-speed shiftable automatic RWD

53000 mi The car was hesitating when leaving a stopped position. 
66000 mi

US $235
I had a ticking sound that started at 1800RPMs and got faster and louder, with RPMs, up to 4000RPMs. Dealer correctly diagnosed as... 
167000 mi

US $980
Water pump failure. 163k miles 
169000 mi

US $3780
Main bearing total failure. Engine replaced with used part 
34000 mi Valve in the fuel tank was replaced. 
40000 mi the rear seal was replaced 
58000 mi The manual shift mode would intermittently not up-shift. Transmission worked in all other modes. Originally, dealer could not replicate problem. On subsequent visit, problem was noted by technician and the shifting unit replaced. 
69000 mi

US $385
oil pan leak 
71000 mi

US $40
Replaced deep belt. 
90000 mi

US $345
Replaced tranny mount 
99000 mi

US $800
cleaned throttle body 
14000 mi Hose leaking at connection to radiator. 
7000 mi Cruise Control Surge Repair 
108700 mi

US $15
Car has had persistent coolant smell after driving. Noticed upper radiator hose clamp had coolant residue. Replaced upper hose and clamps. Car still has coolant smell, but does not lose coolant or overheat. 
109700 mi

US $3
Has very common head gasket coolant weeping. Possibly fixed with Subaru Coolant Conditioner. 
16000 mi Hard shift from 2nd to 3rd gear in manual mode. 
12000 mi TSB for Silicone in Heater core causing ticking noise inside the dash They had to redo the silicone because they missed some. 
51000 mi check Engine light, engine sensors failed. Car died and needed to be towed and resulted in dead battery. 
59000 mi

US $450
Check engine light led to error code P0455, confirmed with smoke test. Evap canister replaced.  Also replaced leaking coolant hose. 
132000 mi

US $900
Removed and replaced two valve timing gears and belt 
40200 mi Complete replacement of VTC pulley system due to SES 
16000 mi Fixed surging issue in cruise control; replaced radar sensor and reflashed ECU. 
24000 mi Acceleration surge from stop, reprogrammed ECU to fix. 
85000 mi

US $699
Coolant leak repaired. Replaced coolant pipe o'rings, expansion tank & attached hoses, flushed & refilled system. 

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2007 Infiniti G 4dr Sedan

306-horsepower 3.5L V6 5-speed shiftable automatic AWD

22320 mi Gearshift not going into DS / stuck in DS. 
72000 mi

US $60
TPMS Sensor flashed then solid yellow. Was told the TPMS sensors were OK but needed to be reprogrammed. Dealer reprogrammed all 4 sensors and stated it was not covered by the extended warranty.  
19000 mi Extremely sensitive throttle. You could push on the pedal and it would just take off all of a sudden. Found a TSB for the issue and gave it to the dealer. They performed the TSB and it works fine. 
64000 mi

US $55
After doing some research I discovered that I wasn't crazy in thinking that the throttle was way too sensitive in low speed situations. Turns out there was a service bulletin on this and a software fix for the electronic throttle. 
96700 mi

US $125
Leaking radiator hose 
1860 mi Throttle sensitivity TSB 
97000 mi Throttle body refleash for hesitation and juddering at speed. 
98000 mi

US $1144
Radiator burst. 
50000 mi Strange hesitation and shifting problems around 3k rpms. Transmission mechanically perfect and no shavings. Mechanic replaced TCU (with the valve control box) on advice from Infiniti and issue is gone. 
63000 mi Car was hesitating and running rough on cold start-up. ECU was re-flashed with latest software 
9000 mi TSB ITB07-045, 2007 G35 SEDAN; COLD ENGINE START ISSUES • Rough idle during the first minute of engine operation after cold engine start. And/or • Slight engine speed fluctuation during light throttle acceleration during the first ten minutes of d 
37820 mi

C $22
Mechanical key could not be removed from port. Mechanic successfully removed key without damage to either key or port. 
22000 mi Gear select unit malfunctioning (electronic failure) (but went in gear). 
23000 mi Gear select unit malfunctioning - short in shift indicator switch (but went in gear). Previous repair thought to be successful, but turned out to be temperature related, and reappeared. Won't know if this was successful until winter. 
36000 mi Replaced left side catalytic convertor. 
39000 mi Camshaft position sensor replaced 
44000 mi SES light indicated occasional timing issues. Cam sprocket had excessive unusual wear. Replaced. This problem is intermittent and the SES light can take a while to detect the issue and come on again. 
68700 mi

US $150
Main radiator hose was split and needed to be replaced, but coolant flush was also conducted at same time as repair since system was open 
122580 mi

C $850
Bank 2 Throttle Body failure. Car would not start, could smell gas. Computer code directed shop owner to the problem quickly. Purchased used Throttle Body for $200 versus $800 for new from dealer. 
205840 mi

C $700
Both variable valve timing solenoids had to be replaced so the car could pass an emissions test for resale. Rad hose clamps rotted and hose blew off spilling almost all coolant. Driven a ways in this condition, head gasket blown, possibly more damage. A write off. 
73500 mi

US $35
Oil change and rough idling 

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2007 Infiniti G 4-door

6-cylinder manual 2WD

18000 mi Alternator Bearing was bad 

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2007 Infiniti G 4-door

6-cylinder automatic AWD

9000 mi Tapping noise from dash area when accelerating above 2500 rpm. 

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2007 Infiniti G 4-door

4-cylinder automatic AWD

12000 mi Slight hesitation with engine and/or transmission at low RPMs. Mechanics could not recreate problem. 

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2007 Infiniti G 2dr Coupe

293-horsepower 3.5L V6 6-speed manual RWD

16920 mi Engine is undergoing an oil consumption test. Apparently Rev-Up engines are prone to oil loss. 
19520 mi Engine was using excessive amounts of oil. Engine was replaced. 
12000 mi Clattering noise from engine when shifting gears and using brake or gas pedals. Dealer determined it as known problem with this type of car (G35 coupe stick shift) where engine goes through oil too quickly, and that engine would need replacement. Engine was successfully replaced and has been fine since. 

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2007 Infiniti G 2dr Coupe

275-horsepower 3.5L V6 5-speed shiftable automatic RWD

52300 mi Thermostat sticking and was replaced. Also removed an air pocket in the coolant system. 
68500 mi

US $110
replaced oil cooler o ring 
53500 mi

US $50
Car overheated... replaced thermostat and all is good. 
29000 mi

US $150
AC Belt replaced 

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2006 Infiniti G

Engine not specified

23000 mi Catastophic failure, Bearing and crank shaft noise. Suspect spun main or rod bearing. Complete engine replaced under warranty. 

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2006 Infiniti G 4dr Sedan

298-horsepower 3.5L V6 6-speed manual RWD

48000 mi

US $20
Oil consumption test. First told 1k miles per qt was normal when first reported when vehicle was new. It first used 1k miles per qt. Now uses 1 qt per 2k miles. Told by dealer there is now a TSB for 350Z & G35.They measure consumption by mm on the dip... 
50000 mi In 3415 miles since last oil change oil consumption amount used on the oil dipstick was 12mm. Dealer stated 18mm usage was required to qualify for engine replacement under warranty. This amount would have qualified when new but dealer at that time ... 
29000 mi

US $125
Increased oil consumption. Found on Internet that common with 2005-2006 G35 with manual transmission and high-rev engine. One day before dealer test found PCV valve stuck. Fixed this, and after 460 miles no missing oil. Will check again at 1k miles. 
29000 mi Above 500 miles after oil change, oil start dissapearing fast,then accelerated to 10mm on the dipstick at 997 miles! At the Dealer, only 4.5mm was missing! I have pictures. Contacted Customer support and went to retest at another dlr. 
33000 mi BACK FOR 2K MILES TO CHECK OIL CONSUMPTION. WHEN OPENED WITH OWNER'S PRESENT, THE MISSING OIL WAS QUESTIONABLE. 7 TO 8mm MISSING ACCORDING TO DEALER AND 13 TO 14mm ACCORDING TO OWNER.HAVE PICS. ACCORDING TO NEW TSB 18mm OR MORE IS BAD. 
37000 mi Experimenting with different high mileage oils, detergents and additives since July, with only changes every 1,000 to 2,000 miles. So far oil consuption is down about 30 percent. 
37500 mi

US $180
Oil consumption problem fixed on manual G35. The PCV valve gets clogged because of high oil suction. Adding an oil air separator ahead of the PCV prevents this from happening and saves the engine if discovered early, before oil is gone! 
45700 mi

US $400
Oil consumption. After trying all remedies over the counter, I tried some of less conventional ones. Update: still using oil, but less than before, about one quart per 1,500 miles. 
55000 mi

US $150
Belts 
59000 mi Using about a quart of oil per 1,000 miles when sold. 
The clutch and flywheel was repl. by Nissan dealer but still the cluch mades smell like it was slipping. I am dessepointed. The clutch issue is complete factory disaster. Howcom factory cannot make clutch and flywheel combo without burning c 
110000 mi

US $1000
replace clutch, flywheel and related components. 
36580 mi CEL comes on after refuel and stays on now. Possibly a new fuel filler cap is needed, or worse - emission system problem. 
43400 mi

C $510
Faulty emission control valve 
46500 mi

C $60
Trouble code P2135 - throttle pedal sensor switch voltage issue. Performed ECM reset 
58900 mi

C $125
Strong burning smell inside car, heater blowing cold air intermittently. Cause: low coolant. Shop performed coolant flush to fix problem. 
58900 mi Burning excessive oil. Shop recommended replacing engine - terminal problem. 
90000 mi

US $425
Fuel sensor failure, affecting supply 
97300 mi

US $529
belts worn 
33000 mi radiator fan motors are defective. 
96000 mi One of two radiator fans stopped working and was replaced 
70000 mi

US $22
Replaced bad evap valve 
65720 mi

C $738
Replace cam sensors 

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2006 Infiniti G 4dr Sedan

280-horsepower 3.5L V6 5-speed shiftable automatic RWD

82000 mi

US $800
MAF Indicator failed,  

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2006 Infiniti G 4dr Sedan

280-horsepower 3.5L V6 5-speed shiftable automatic AWD

97000 mi

US $800
Thermostat failed. Replaced unit. 
99000 mi

US $1000
oil o-ring / gasket failed...leaked 
160000 mi

US $300
cam shaft sensor needed to be replaced accessory belt needed replacement 
77000 mi

US $500
Oxygen sensor failed. 
81700 mi

US $1850
original muffler and related pipes replaced. 
83000 mi

US $280
Cam position sensor failed. Service engine & traction control lights illuminated. Would fail to start at times. 
92700 mi

US $70
Oil consumption 
118000 mi Exhaust heat shield rattling under acceleration. Clamp applied to reduce vibrations. 
81220 mi

C $300
Rust on fuel fill nozzle prevented the gas cap from sealing. Check engine light sayed on. The rust was cleaned up and a new cap installed. 
80000 mi

US $500
cleaned out intake etc. 
98580 mi replace spark plugs replace gas cap and clean rust from filler neck etc. 
105400 mi

C $3140
Gas tank filler tube rusted. would not hold pressure, therefore check engine light on. Had to be replaaced. 
74000 mi

US $1000
The radiator had a blockage and caused the engine to overheat. The faulty radiator needed replacing. 
85000 mi

US $280
Replaced heat shield 
88000 mi Removed loose heat shield 
73000 mi

US $100
Cam position sensor. 
97000 mi

US $445
Evap system leak cause check engine light; first visit replaced gas cap, then canister vent valve 
102000 mi

US $1556
Muffler fell off, repaired it 
97000 mi

US $100
Cam sensor seals leaking; replaced both cam sensor seals 
84320 mi

C $850
Engine fault light came on, emission system component failure. 
69000 mi Thermostat 
55000 mi Thermostat was faulty. Was replaced under warranty 
38000 mi Heavy upper lifter noise upon starting car. Did not go away even after warming up. After the oil was changed, the noise was gone and so far has not returned. Was explained that it might have been a lifter that bled down. 
88000 mi There was an air bubble trapped in the cooling system, causing the vents to blow hot air only when the car was accelerating. They "burped" the cooling system to solve the problem. 
92000 mi Leak in EVAP system. 
97000 mi

US $881
EVAP Canister Control Valve Replaced 

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2006 Infiniti G 4-door

6-cylinder manual 2WD

28000 mi Engine burned excessive oil, was replaced under warranty. 

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2006 Infiniti G 4-door

6-cylinder automatic 2WD

24000 mi temp sensor was not working and on previous service a part was ordered which was not installed until this trip. 

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2006 Infiniti G 2dr Coupe

298-horsepower 3.5L V6 6-speed manual RWD

18000 mi Engine replaced. 
88000 mi Engine burning oil. 
31000 mi Engine replacement starting to detonated at low rpm under light/moderate accels on mild to hot ambient temperature days. Always use premium fuel. 
33800 mi Detonation issue continues. Dealer did Consult II test wrong (not under calculated load) and states can't duplicate issue. Still detonates when I drive. Dealer not competent. 
41000 mi Warranty replaced VQ35DE engine started consuming oil much more than its usual consumption. Found PCV full of oil not operating correctly during oil change. Cleaned PCV and will see if consumption rate decreases. PCV only had 11K miles on it new. Still detonate on hot days with 91 octane. Dealer useless in resolving long-term issue. Now using custom fuel mix for no detonation. Over and beyond what an owner should have to do in normal operating conditions.  
45000 mi

US $99
VQ warranty replacement at 16K miles is failing per my professional used oil analysis report. Bad and/or sub-standard metallurgy build in the valvetrain. Cost listed is price of analysis report. 
46000 mi Engine pre-detonates in cold weather, where it only did that in hot ambient weather. Mandated E10 premium fuel only available now. 
47000 mi

US $350
This piece of junk has had 3 engines. The one I got it with and the two I had put in under warranty. It burns oil like mad. So fast it is hard to keep up with. 
21000 mi Replaced engine due to severe oil consumption 
42000 mi I just traded my G35 in based upon oil consumption. I had the engine replaced at 22k under warranty and was looking at having to go through this again. 
43000 mi

US $270
lost power on a trip and limped home - had crankshaft position sensor replaced - if happens again, other code was for camshaft position sensor 
75000 mi

US $356
Thermostat stuck, overheated. Stranded overnight while they diagnosed the problem. At least they gave me a loaner and Is neat St Simons. 
24000 mi Fuel pump failed and was replaced under powertrain warranty. 

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2006 Infiniti G 2dr Coupe

280-horsepower 3.5L V6 5-speed shiftable automatic RWD

65000 mi

US $275
Had all belts replaced 
31000 mi unable to refuel completely 
70000 mi

US $600
Fan assembly replace 
19000 mi Bank 1 Oxygen Sensor (Air/Fuel Ratio Sensor) was defective 
36880 mi

C $250
Belts worn- particularly ac. Repairing other mods and had an opportunity to do the belts. 
40500 mi Air needed to be bled out of the system. 
89000 mi

US $60
Belt replacment. 
81000 mi

US $1000
squealing drive belts 
91000 mi

US $89
Squeling drive belts at start up and doesn't go away until car has warmed up. Sometimes would take up to 45 minutes until noise will go away. 
92000 mi THE DRIVE BELTS WERE SQUEALING AND THE TECH AT THE DEALERSHIP JUST LUBRICATED SOME PART ASSOCIATED WITH THE DRIVE BELTS. NOISE WENT AWAY FOR ABOUT 3WEEKS.HAS STARTED TO SQUEAL AGAIN DURING MORNING START UP ONLY& LASTS 10-15 MINUTES. 
148000 mi

US $28
AC Idle Pulley replaced 
150000 mi

US $100
belts and pulleys replacement 

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2005 Infiniti G 4dr Sedan

298-horsepower 3.5L V6 6-speed manual RWD

137000 mi

US $85
Exhaust leak near O2 sensor, heat shield rattling caused hole. 
82000 mi The infamous Nissan oil consumption issue. Nissan in their infinite wisdom put "low tension" rings in this engine, allegedly they save a few fractions of ml of fuel per mile. But the rings are too loose in the bore, so oil gets sucked in 
26000 mi Vehicle would not rev above 2200rpm, no code present. Dealer could not replicate. 
63000 mi

US $1400
Replaced clutch, was worn, and flywheel. 450 for labor, rest for parts. Previous owner (I purchased at 51k miles) drove car in te city a lot, I'm guessing this led to problem. 

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2005 Infiniti G 4dr Sedan

280-horsepower 3.5L V6 5-speed shiftable automatic RWD

182000 mi

US $500
Radiator replacement. 
260000 mi

US $300
Replaced crankshaft position sensor 
137000 mi

US $7
Replaced oil cooler gasket due to small oil leak near oil filter. 
136400 mi

C $400
Replaced rusted muffler and mid pipe with prime condition used parts. Mid pipe from a 2004 coupe. 
200000 mi Had a new water pump installed had all belts replaced Had emergency brake shoes replaced Had the throttle body cleaned 
32000 mi Timing chain tensioner in the engine had to be replaced. Fixed, but SES came back on. Replaced all hydraulic stuff on top of engine including variable cam sprockets and they crossed their fingers. I believe they tried the variable timing module before that. Three trips to get it fixed. 
47000 mi

US $58
Oil drip from under car. 
130300 mi

US $40
Replaced belts 

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2005 Infiniti G 4dr Sedan

280-horsepower 3.5L V6 5-speed shiftable automatic AWD

93000 mi Service engine soon light came on, read code as PO172, cleaned MAF 
38000 mi Check engine light came on in sep, bought a new sensor, CEL back on so brought back to shop. They fixed, light back on again. 
39000 mi

US $400
Engine light back on. 
83080 mi

C $15
Exhaust leak around flange that connects muffler to exhaust pipe. Pipe to flange rusted through around weld seam - same problem I had with 2004 FX35. Cut tubing on both sides of flange and replaced flange with 2.5" OD repair connector. 
88660 mi MIL on, P0455 code indicated major emissions system leak. Replaced gas cap but that didn't solve problem. Removed and cleaned evaporative emissions control valve and checked function, then re-installed. All okay now. 
100060 mi

C $80
MIL on, P0455 code indicated major emissions system leak. Had previously cleaned evaporative emissions control valve and re-installed. Problem returned to replaced valve. 
76700 mi

US $150
Rattling heat shields on catalytic converters. Dealer put a clamp around them. 
84520 mi

C $63
Issues with Intelligent Key system. 
206700 mi

US $600
Replaced radiator 
70000 mi radiator leaking coolant. dealer said could not find. replaced radiator as it had a leak in it. fixed under repair. 
120000 mi

US $1600
Car rapidly overheating. Problem with thermostat? ...item that coordinates cooling with the radiator. Radiator flushed.  
117500 mi

US $250
Cam position sensor replaced 
80600 mi

C $1200
Warning light on dash related to emissions control system, sensor replace and light went out. 
35000 mi Fuel sensor malfunction. Car drove normally. Sensor replaced under warranty 
56000 mi Gas tank would not fill all the way. Shutter valve replaced. Check engine light on. Vent thing replaced. 
274000 mi

US $35
P0422 Evap System Large leak, replaced Charcoal canister vent control valve. cleared check engine light 
101000 mi

US $550
Throttle/Pedal sensor 
64000 mi

US $275
P0455 code on service engine light on -major evaporative leak. Purge control valve on evaporator canister failed - common on many Nissan vehicles. Part cost is about $115, but will install myself. Exhaust intermediate pipe to muffler joint failed due to corrosion. Unrepairable with both parts requiring replacement at a cost of >$1000 plus labor. Seeking alternatives, eg used parts. Disappointed in the Infiniti over this exp. faiure. Used muffler purchased for $50. Monro able to salvage intermediate pipe joint so repair total $175 compared to >$1000 with new OEM parts. 
64000 mi

US $99
Purge control valve on evaporative canister replaced with new part by self. 
68000 mi

US $295
Flange between mid pipe and muffler corroded for second time in 2 years. Independent mechanic repaired with kit. 
69000 mi Cooling fans failed with possible overheating. Dealer quoted $1355 to repair - declined. 
70000 mi Car had overheated due to cooling fan failure. Mechanic diagnosed head damage and about $2500 to repair. Sold the car to the mechanic instead. 
104300 mi

US $372
Camshaft position sensor failure 
131000 mi

US $275
Cam position sensor failure. 
47120 mi

C $200
Major evap leak. Control valve replaced. 
48980 mi

C $275
Resonator (exhaust system) had hole, had to replace 
76260 mi

C $1500
Vent control valve failed. Required replacement. 
5000 mi defective muffler. new one ordered 
82000 mi

US $16
Serpentine belt needed tightening. Changed oil filter rotated balanced aligned tires. 
71920 mi

C $250
Evap Canister 

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2005 Infiniti G 2dr Coupe

298-horsepower 3.5L V6 6-speed manual RWD

35000 mi

US $200
Found 1 broken radiator fan, replaced under warranty... Recommended/replaced 2 belts for $200 (my mechanic says no way that was needed). 
66000 mi

US $60
Car began overheating,replaced thermostat and coolant to resolve issue. 
82300 mi

US $1500
Clutch began to slip, consensus seems to be it goes between 70,000 and 90,000 miles. No other issues. 
73000 mi

US $77
Had small leak in coolant system (loose hose clamp). Shop found leak, replaced crappy OEM spring clamp with worm-gear hose clamp. Flushed & filled w/new coolant (genuine Nissan fluid). 
53000 mi After starting an oil consumption test, it was deemed that my engine was over-consuming oil. The service advisor ordered me a new engine and scheduled an install date. 
47000 mi

US $800
Replaced mass airflow sensor and the overtemperature sensor(s).  
51000 mi

US $370
Rattle in engine bay noise during shifting and normal driving. 
30000 mi Engine Burning Excessive Oil: Engine Replaced With Factory New Engine. 
20000 mi Fuel Gauge never reading full. 
59000 mi Oil Consumption, Motor was replaced 
64000 mi

US $15
Oil pooling where spark plugs are. Valve cover being replaced under power-train warranty. However, spark plugs had to be supplied by me, the customer, but spark plug installation was free. I will pick up the car when they call me. 
59000 mi Oil consumption.. needed new engine.  

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2005 Infiniti G 2dr Coupe

280-horsepower 3.5L V6 5-speed shiftable automatic RWD

74400 mi

C $1560
Replace Bank 1 A/F Sensor 
12000 mi MAF sensor replaced 
48000 mi Oil cooler ring leaking, pwrtrain warranty repair 
41000 mi

US $580
Car went into limp mode while driving, drastically reducing engine power. Error codes said Throttle Pedal Assembly, so whole assy replaced. Same problem happened again and Throtle body assy replaced. Problem happened again & at dealer now The Throttle Pedal Assy replaced ($570 my cost), the Throttle Body Assy replaced (dealer paid), then wiring harness inspected. A small area of wire was chafed and shorting, apparently causing the error codes. After repair (dealer's cost) ok. 

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2004 Infiniti G

Engine not specified

181000 mi

US $3300
One of my pistons broke down and destroyed my engine 

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2004 Infiniti G 4dr Sedan

280-horsepower 3.5L V6 6-speed manual RWD

109120 mi

C $250
Exhaust leak at the flexible connections just after the exhaust manifold 
119660 mi

C $1000
Muffler separated from the exhaust pipe. As the entire system was getting old, replaced it from the cat converters back. 
136400 mi

C $130
Fuel line developed a slight leak. Shop cut out rotten section and installed a custom patch. 

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2004 Infiniti G 4dr Sedan

280-horsepower 3.5L V6 5-speed shiftable automatic RWD

15500 mi acceleration sensor replaced under warranty 
96080 mi Temperature sensor replaced. 
98300 mi

US $150
Oil cooler failed, had it replaced/rebuilt 

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2004 Infiniti G 4dr Sedan

260-horsepower 3.5L V6 6-speed manual RWD

121000 mi

US $2615
Replace valve cover gaskets. Replace fuel damper 
55000 mi

US $1300
Radiator ruptured and had to be replaced. 
184000 mi Needed new clutch. Still on original at 183,500 miles. 
56000 mi Catalytic converter replaced. 

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2004 Infiniti G 4dr Sedan

260-horsepower 3.5L V6 5-speed shiftable automatic RWD

99000 mi

US $280
TPS sensor went bad. Have to replace throttle body. 
100000 mi

US $400
Accelerator pedal postion sensor was bad. Replace pedal and sensor. 
129700 mi Replaced cam sensor on bank one, passenger side. 
139000 mi

US $150
Replaced both cam sensors after the car was hesitating. Got an error code and purchased sensors at autozone. Easy fix. 
141000 mi

US $356
Throttle position sensor malfunction, high idle. 
77000 mi

US $62
camshaft position sensor bank 1. passenger side sensor. code p0340 
67000 mi

US $250
electric cooling fans replaced under extended factory warranty 
111700 mi

US $140
Cam Positioning Sensor Passenger side 
85000 mi

US $400
Leak in oil cooler. 
86000 mi

US $475
Replaced left and right cam sensors. Replaced cranksensor. 
85000 mi oil pan gasket leaking, took to shop to get a new gasket installed. The leak was fixed. 
97000 mi

US $300
Engine running rough and check engine light came on. Number 1 cylinder had a broken ignition coil. Replaced coil and everything was fine. 
110000 mi removed and cleaned the throttle body.The car was not running the way it should. It only took about one hour to repair the problem. I could not believe how dirty it was. 
117700 mi

US $550
Radiator leaking, split at seam. Had to be replaced. 
125000 mi

US $100
Bad radiator cap 
122000 mi

US $2900
Replaced pulleys (2) and did regular maint for 120K: replaced coolant, brake fluid, tranny fluid, power steering fluid, differential gear oil, and all belts. Car continues to run extremely well. Now just creaking a bit. They had to replace the o-rings on cylinders 5 and 6 due to oil seepage. This is a common issue with this car. This required replacing the head gasket and taking the top end off (a $6-700 price tag). 
29000 mi

US $22000
TPS code triggered. Dealer fixed by replacing throttle body under warranty. 

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2004 Infiniti G 4dr Sedan

260-horsepower 3.5L V6 5-speed shiftable automatic AWD

75000 mi

US $800
During a MD state inspection, a hole due to rust in the muffler was found. Consequently, the muffler had to be replaced. 
78000 mi

US $360
Very hard starting. Had fuel injector service/cleaning, etc. and battery charge. Also oil change and full check of systems. 
49000 mi

US $800
throttle body and sensor replaced ($800)  
79500 mi Oil leak by oil filter/cooler 
105300 mi

US $990
Replaced valve cover gaskets along with replacement of spark plugs as oil was leaking onto coils. Only cost of valve cover gaskets included in repair ($550) 
70000 mi

US $600
Gas leak 
117500 mi

US $975
Replaced the radiator. It developed a leak. Overall, this car has been very unreliable. 
128000 mi

US $1600
Replaced exhaust and muffler behind catalytic converters. 
201700 mi

US $241
R & R radiator , change belts , 
38120 mi

C $400
Exhaust resonator needed to be replaced. 
125500 mi

US $1525
Replaced catalytic converter While in for other issue, found valve cover gaskets leaking and had them replaced. 
124000 mi

US $375
Ended up replacing MAF, took 2 trips to diagnose and repair. 
110000 mi

US $295
Replace radiator. Self install. 
142000 mi

US $438
Replace Catalytic converters. 
81840 mi

C $800
Crack in center muffler- replaced with OEM part 
63500 mi

US $845
Throttle body problem, would have eventually led to stalling, perhaps no start. 

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2004 Infiniti G 2dr Coupe

280-horsepower 3.5L V6 6-speed manual RWD

57000 mi Replaced cracked drive and ac belts 
78000 mi Oil leaking into spark plug tube (cylinder #5) valve cover replaced. Replaced by dealer under 60 day or 1200 mile used car warranty. 
134300 mi Oil consumption 1 quart every 1500 miles well known issue with the vq35 engine. 
151000 mi

US $125
Replaced MAF 
164700 mi

US $2100
Replaced clutch lasted 105k miles 
23000 mi Both fuel senders replaced. The fuel gauge would not go to full after filling the tank. This repair was fully covered under the original warranty. 
22000 mi * Unreportable; happened before joined: Bad fuel sender in gas tank. Dealership replaced under original factory warranty. 
55180 mi engine knocking fuel tank sensor off calibration (cant fill up to full) 
10036 mi Fix fuel tank sensor - warranty 
16211 mi Fix fuel tank float - warranty Fix broken driver's seat mount 
32000 mi

US $840
Fuel gauge problems. Replaced bad fuel tank sending unit (sensor). 
52300 mi

US $200
Replaced fuel pressure regulator assembly 

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2004 Infiniti G 2dr Coupe

280-horsepower 3.5L V6 5-speed shiftable automatic RWD

65000 mi Service Engine Soon light came on. Throttle body had to be replaced. 
94000 mi

US $1118
Replaced valve covers because they were leaking oil into the spark plugs. 
112000 mi

US $350
Replaced both Camshaft Position sensors to fix an oil leak. 
113000 mi

US $300
Repaired oil leak. 
119000 mi

US $1200
Needed several new exhaust parts. 
138000 mi

US $463
Exhaust was loud, replaced Y-pipe 
213300 mi

US $53
replaced crankshaft position sensor 
49000 mi

US $195
Replaced thermostat 
107000 mi

US $275
The radiator started to leak. Had to replace it. 
32000 mi

US $305
CEL came on and car had a slight roughness at idle. Shop read codes (2) and cleaned throttle body, replaced air filter, replaced coil and plug on #6 cyl. This is the only repair to date - car runs fine now. 
33500 mi

US $785
2nd ign. coil failure in short period of time - replaced the other 5. Shop couldn't believe the 2nd one failed in such low mileage. Runs like new now. 
136000 mi

US $724
Camshaft sensor need to be replaced 
111000 mi

US $4
My 04 G wouldn't go no more than 1500 rpm's so I shut down the car and started back ok. Also check light came on so I took it to Auto zone and pulled code(s). It came up with throttle body, pulled it, cleaned with T.B. spray works great. 
22692 mi Replace throttle chamber under warranty 
91140 mi Crankshaft sensor replacement 
95460 mi Crankshaft sensor replacement 
78000 mi

US $210
Oil pan leak,  
91000 mi

US $110
Bad oil cooler seal, leaking oil 
91000 mi

US $350
Cracked radiator bad thermostat 
94000 mi

US $130
Idle air control learning computer reset itself 
91000 mi

US $99
CEL light u1001(canbus), p1574(vss), p0462(fuel level sensor), p0500(vss). CEL p1168(bank1 sensor 1) in the same month. CEL was not cleared but is no longer present. ALL of the 02 sensors will be replaced @ 100K as preventative maintenance OIL found on spark plugs in 3 cylinders. I replaced the spark plugs seals with an aftermarket solution. I also replaced the plugs, valvecover gaskets, PCV valve, cleaned throttle body and maf sensor, reset ecu and did an idle relearn. 

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2004 Infiniti G 2dr Coupe

260-horsepower 3.5L V6 6-speed manual RWD

102000 mi

US $450
Engine appears to burn through oil quickly. Mechanic is attempting see how well an oil additive will help. 

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2004 Infiniti G 2dr Coupe

260-horsepower 3.5L V6 5-speed shiftable automatic RWD

52080 mi Radiator fans changed. We bought an extended wRranty so it was covered but part was 850.00 and shop time was extra. 
162700 mi

US $20
Thermostat replacement Air intake hose split while replacing air filter 
109158 mi

US $260
Car gave me the P0345 code after stalling on the highway in traffic. Diagnostic recommended Crankshaft Position Sensor on driver side needed replacing. (Bank 2)Shop replaced this in about 2 hours. 
111000 mi

US $125
Cooling fan stopped spinning on the driver side causing the engine to overheat in traffic after a certain temperature. 

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2004 Infiniti G 2-door

6-cylinder automatic 2WD

46000 mi Throttle body went bad. New one installed under factory warranty. 

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2004 Infiniti G 2-door

4-cylinder automatic 2WD

45000 mi Idle trouble, (after being warmed, engine wanted to die upon first restart). Carbon build up found in throttle body, and was cleaned out. Idle valve was “relearned”. 
46000 mi CEL on. TSB performed to reprogram ECM. Intermittently when fueling, gas pump shuts off before tank is finished filling. Tech tried to replicate situation with no success. (This has not occurred since) 

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2003 Infiniti G

Engine not specified

175000 mi

US $260
Oil leak repaired and cleaned - Engine oil cooler replaced.  

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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. 

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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. 

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2003 Infiniti G 4dr Sedan

260-horsepower 3.5L V6 6-speed manual RWD

56000 mi

US $530
cam sensor failed - bank 1 replaced cam sensor both banks, banks 1 and 2 
75020 mi

C $20
Intermittent no-start diagnosed by owner as faulty clutch pedal interlock switch. Verified by wire jumper. Switch replaced by owner. 
59000 mi

US $558
Replaced muffler and resonator. 
175700 mi

US $350
Radiator leak after I have gotten the car detailed, they washed the engine, and it stated leaking. Nothing huge. 

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2003 Infiniti G 4dr Sedan

260-horsepower 3.5L V6 5-speed shiftable automatic RWD

122000 mi

US $1000
exhaust rusted loose, also oil in spark plug wells. 
123000 mi

US $1000
car would not start 
95700 mi

US $1000
Car overheated, later noticed that there was coolant on garage floor. So strange. Engine coolant leak. 
101000 mi Gas cap replaced. 
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! 
117300 mi

US $150
#4 cylinder coil loose, reconnected. 
112000 mi

US $120
Cracked radiator, replaced radiator with oem spec aftermarket radiator. 
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 
126700 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 
68820 mi

C $350
Valve cover gasket 
140000 mi

US $170
Radiator gasket started leaking. Replaced Radiator with aftermarket (KOYO) radiator. 
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 
140000 mi

US $800
Radiator Leak. The radiator was replaced 
114000 mi

US $330
Cracked radiator, needed new one. 
173700 mi

US $320
Replaced lower oil pan gasket. 
194000 mi

US $422
Replaced both cam position sensors and crank position sensor. 
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. 
125000 mi

US $114
Replace accessory belts. 
128000 mi

US $300
Hydraulic coupling for cooling fan failed. 
97960 mi

C $1300
Water pump and belts. 
98000 mi

US $50
belt adjustment 
98300 mi Replace Belt 
66960 mi

C $425
Fuel pump failiure. Replaced defective part with new part. ALl work carried out at local dealership. 
104000 mi

US $600
Replace knock sensor 
130000 mi

US $750
Service engine light was on. The dealer told me to change the engine. 
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. 
191000 mi

US $30
Cam position sensor driver 
145000 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. 
49000 mi Replaced a bad VVT solenoid at dealer's expense. 
134000 mi

US $1700
Crank and cam sensors were replaced. New valve covers. 
189700 mi

US $828
EVAP Vent valve and canister 
157000 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. 
103300 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). 
117800 mi

C $230
Radiator replaced, pressure test done 
76880 mi AMS very expensive to repair - part alone $1500! 
90000 mi

US $550
Radiator blew and was replaced 
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. 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) 
115000 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. 
116500 mi

US $500
O2 sensor replaced 
125300 mi

US $1500
Camshaft sensors 
110360 mi

C $600
Squealing belt pulleys. Dealer replaced. 

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2003 Infiniti G 4-door

6-cylinder automatic 2WD

89280 mi

C $500
fuel damper. 

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2003 Infiniti G 2dr Coupe

280-horsepower 3.5L V6 6-speed manual RWD

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 
79000 mi

US $145
Oil seal replaced 
113460 mi

C $200
Bad Ignition Coil. Replaced. Caused P0300 code. 
106000 mi

US $175
Replaced spark plugs, changed oil and replaced intake manifold. 
124000 mi

US $1200
Replaced clutch and flywheel 
98580 mi

C $535
Throttle body and Accelerator pedal position sensor 
87000 mi

US $10500
Exhaust Camshaft was worn 
88000 mi

US $1000
Radiator leak on the seams 
82300 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. 
115700 mi

US $70
Camshaft position sensor failed; replaced. 
51000 mi Throttle position sensor and throttle body were replaced. 
102300 mi

C $301
replace serpentine belt 
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. 
53300 mi replaced O2 sensor 
107000 mi

US $1900
Oil leak around valve cover. Replaced gasket 

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2003 Infiniti G 2dr Coupe

280-horsepower 3.5L V6 5-speed shiftable automatic RWD

64000 mi

US $450
Rusted exhaust (resonator and muffler) 
61000 mi Oil pooling on the spark plug at cylinder #6 when we replaced the spark plugs. Valve cover and gasket replaced under warranty. 
86000 mi

US $240
Had the cam position sensor for the driver side cam bank fail and make the car run poorly and stall occasionally. 
55000 mi

US $800
Engine oil leak required new O-ring. Replaced brake pads and rotors. 
70700 mi

US $100
Check engine error code: Evaporative Emission Control System Leak Detected (very small leak), Replaced gas cap. 
81300 mi

US $1300
Engine running rough with check engine light. Replaced ignition coils and spark plugs. 
65000 mi

US $150
coolant leak 
73000 mi

US $1100
Valve covers and gaskets. 
63000 mi

US $150
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. 
133300 mi

US $500
throttle body. 
79000 mi Valve timing solenoid bad and car ran hot when sold. 
125000 mi Started burning a lot of oil pretty quickly. Sold at a loss. 

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2003 Infiniti G 2dr Coupe

260-horsepower 3.5L V6 6-speed manual RWD

16000 mi Gas filler cap stuck. Actuator manually activated. Problem has not repeated. 
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. 
60300 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. 

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Infiniti G Engine Problems

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