Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 Infiniti G35 owners, lightly cleaned up (personal details are redacted by NHTSA).
Complete center console not working. Stuck on auto a/c with no way to defrost windshield and it was raining. No modes work, no cd, no radio, no heat, no defrost- front or rear. I have already had this happen before, replaced motherboard and it cost me 1200.00 and that was in 2011. Now it has happened again. This is very unsafe. I had my children with me and it started raining and we couldnt get the windshield or rear to defrost so I couldnt see. Why arent all 2003's covered under the recall?????
The charger port had some sort of malfunction and my car was burned to the frame. It was parked in my drive way and had been since 8:00 p.m police officers where coming in my front door at around 2:00 a.m. My car was engulfed in flames.
My slip light and vct light has came on in my 2003 Infiniti G35 and also the ebrake light and non of them will go offf. I recently hydro planed in the rain due not being able to turn my traction control on ABS did nothing to stop my car from loosing traction this would never of happened if my car did not have these problems. Further looking into it they have had made a TSB talking about how the ABS and anti wheel lock May malfunction. I was in a 5 car pile up and almost died. If my traction control was able to be turned on witch it wouldn't let me I would not of hydro planed my whole back end just swung forward out of nowhere people though someone in my car pulled my ebrake the way the back end just swung forward. Both the slip light and the vct light remained on along with my ebrake light. …
My car seat moved all the forward while driving to work in denver metro'bench and back support both pushed me a few inches from the steering wheel. I had to move my leg with my hand to reach the brake pedal. One week later, my car horn began beeping and would not stop while driving. My vdc and brake lights now stay on constantly because the anti skid does not work'I almost wrecked on a snowy highway. The front tires wear exponentially faster than the back tires. I had blowouts two separate times on the interstate. The front windows are now glued shut because they roll down on their own. The airbag light stays on now too. I realize it's an old car; I bought it for $8,000 4 years ago when it had ~95,000 miles. Now it has ~140,000. The level of quick decline is truly frightening though. I don't drive my 2003 infinit G35 any more and am apprehensive to sell it to anyone else. …
Twice now, the vehicle has completely died while in motion, once while backing out of a driveway, another time while driving. Took to a mechanic (not dealer mechanic) who said it was the cam shaft and crank sensors. I looked online and saw that there had been a recall for this part for this year, 2003 for Infiniti G35. Yet when I called, I was told that my VIN was not included in the recall. This to me seems highly suspicious. My 17 year old daughter was driving the car at the times it spontaneously died. I was very glad that she was not on the freeway or somewhere else busy when it happened! This vehicle has otherwise been completely dependable over the past 14 years of ownership, to have it spontaneously die while driving is very frightening for a dependable vehicle!
While driving, the vehicle turned off on 2 occasions. On several occasions, it lost power, and then recovered, but twice, it literally turned completely off. The "slip", "vdc off", and "service engine soon" lights all appeared. I took it to my local Infiniti dealer who said it was subject to a recall for earlier-produced models, and subject to a bulletin which described exactly what had happened. The crank position sensor and bank 1 and 2 of the cam position sensors had to be replaced at a cost of $563.03, and Infiniti says that without NHTSA telling them to pay for it, they refuse. This car is a 2003, however, it is in mint condition with less than 55,000 original miles on it--always dealer maintained.
The climate control/ audio control unit in my G35 froze a few weeks ago making the system inoperable. As a result the the front and rear defrosters have become inoperable creating a dangerous driving condition specially in the rain. This is a common issue for all g35s made from 2003 -2005 and Infiniti is very well aware of it. However they have done nothing to address it. Back in 2003 they have done a recall but only to a limited number of cars that had a particular part number. But the truth is every G35 with the OEM unit is vulnerable to this issue. In ability to control the defrosters affects the visibility which May cause an accident that May result in injuries and or death.
The radio will turn off by itself and turn back on a few seconds later. All of the buttons in the center console become inoperable. The A/C controls also become inoperable and turns on by itself. It just doesn't turn on though, it turns on 90 degrees and starts blasting out. This is a safely issue because as a driver we never know when this air is just going to start blasting out at us like fire. If Infiniti is Smart enough to recall the sedan, they should do the same thing with the coupes. It is clearly a common problem among the '03-'04 models. If they want to keep their reputable name they will do what is right.
Tl* the contact owns a 2003 Infiniti G35. The contact stated that the climate control feature on the vehicle was inoperable. The contact stated that due to the failure, the defroster was also inoperable. Holman Infiniti located at 577 nj-38, maple shade township, nj 08052 was contacted by phone and informed of the failure. The contact was informed that the vehicle was not subjected to a recall. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 140,000.
Had my car in a Nissan dealership for diagnostic for ac problems and was told that my 3rd rear brake light was also out. I was not even aware of this. Then I was told that I could not just replace the bulb, that I would have to buy a complete assembly unit for that and it would run me $287.00 plus tax!!!!! Every time I turn around something is costing me several hundred dollars. This is a safety issue. I just put out over $700.00 for the A/C, radio finisher circuit board, also not on a recall!
Electrical complaints in other G35 years
Frequently asked questions
How common are electrical problems on the 2003 Infiniti G35?
NHTSA has 220 complaints about the electrical system of the 2003 Infiniti G35, 41% of the model year's 533 complaints. The component named most often is 12v/24v/48v battery (2 mentions).
Is there a recall for 2003 Infiniti G35 electrical problems?
No. NHTSA lists no electrical system recall for the 2003 Infiniti G35, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2003 Infiniti G35 electrical problems start?
Half of the complaints with a recorded mileage happened before about 90,000 miles, and 2% before 25,000 miles.
Is it dangerous?
Owners linked 3 crashes, 3 fires and 0 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.