2003 Infiniti G35 Engine and Engine Cooling Problems
Owners have filed 67 complaints with NHTSA about engine and engine cooling problems on the 2003 Infiniti G35, 13% of all complaints for this model year. Half of the reports with a mileage happened before 98,000 miles. The words owners use most often: “position sensor” (30% of reports).
- 67engine and engine cooling complaints
- 98,000median miles at failure
- 1mention a crash
- 0mention an injury
- 1related recalls
- $620typical repair cost reported by owners
- 51%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Position sensor: mentioned in 20 of 67 complaints (30%)
- Included engine engine: mentioned in 13 of 67 complaints (19%)
- Cam shaft: mentioned in 9 of 67 complaints (13%)
- Stalled without: mentioned in 7 of 67 complaints (10%)
How much does it cost to fix?
Owners who wrote down what they paid or were quoted put the typical engine and engine cooling repair on the 2003 Infiniti G35 at $620, and half of them between $520 and $930.
Based on 5 NHTSA complaints about this problem alone that state a repair bill or quote (2008–2011), converted to 2026 dollars with the U.S. consumer price index. These are owners' own figures, not a quote: they include dealer quotes, and owners who file complaints often faced larger repairs, so they can run higher than typical shop prices. Prices vary by shop, region and warranty coverage. How we calculate this.
At what mileage do engine and engine cooling problems happen?
Based on 64 complaints that reported the odometer reading.
How serious are the reports?
Of 67 complaints, 1 mention a crash, 1 a fire.
Infiniti G35 engine and engine cooling complaints by model year
When owners reported it
Related recalls (1)
Engine and engine cooling
Problem: On certain passenger vehicles, the circuit board for the crank position sensor or cam position sensor may have an improper solder joint due to solder deformation caused by heat stress accelerated by the existence of flux residue during the soldering process.
Risk: This could cause the "service engine soon" warning light to come on, create a no start condition, cause reduced engine power, or cause the engine to stop running without warning during vehicle operation, which could result in a crash.
Fix: Dealers will replace the crank position sensors. Camshaft position sensor(s), and in some cases, the variable timing control sensor(s). Vehicles involved in a previous recall campaign, 01v357, are also included in this new campaign. The replacement sensors used in that campaign are also affected. Owner notification began on december 22, 2003. Owners should contact nissan at 1-800-647-7261 or infiniti at 1-800-662-6200.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
As i was accelerating to access highway, i was not able to accelerate my vehicle. It was as if i was running out of gas. I kept pressing the gas pedal and it slowly started to accelerate and seemed fine. A few minutes later when i was sitting at a red light, the car died. I put it in park and…
Tl* the contact owns a 2003 infiniti g35. While driving approximately 70 mph, the engine stalled and the service engine soon, vdc off, and the flip warning indicators illuminated. The vehicle was able to restart after numerous attempts. The vehicle was towed to a dealer who stated that the crank…
I have a 2003 infiniti g35 and this past week while driving on the freeway my car stalled and lost all power and completely shut off while driving, which almost led to a very bad deadly car accident on the freeway, i was able to then move to the side of freeway, i then was towed to a infiniti shop…
Frequently asked questions
Do all 2003 Infiniti G35s have engine and engine cooling problems?
No. NHTSA has 67 owner complaints about engine and engine cooling for the 2003 Infiniti G35 (13% of the 533 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2003 Infiniti G35 engine and engine cooling?
Yes: 1 safety recall list engine and engine cooling. Check your VIN on NHTSA.gov to see whether the fix was done on your car.
At what mileage do engine and engine cooling problems start?
The median reported mileage is 98,000 miles: half of the reports with a mileage came before that.
How much does it cost to fix engine and engine cooling problems on the 2003 Infiniti G35?
Owners report a typical cost of $620 (half paid between $520 and $930), from 5 complaints that state a repair bill or quote, in 2026 dollars.
What do owners say about engine and engine cooling problems on the 2003 Infiniti G35?
The most frequent phrase is “position sensor”, in 20 of 67 complaints, followed by “included engine engine” (13).
Other 2003 Infiniti G35 problems
See all 2003 Infiniti G35 problems or engine and engine cooling problems across all G35 years.