Is the 2003 Infiniti G35 a bad year?
531 owner complaints to NHTSA. Engine complaints: 121, 6.7× a quiet G35 year.
Keep it, but watch the engine
Half of the engine complaints for this year were filed at 81k–134k miles, where you are now.
The verdict moves with mileage: the same car reads differently at 30,000 and at 150,000 miles.
What 2003 G35 owners report, by mileage
Each system owners named in five or more complaints, with the mileage range where the middle half of those complaints were filed. Read at 101,000 miles.
| SYSTEM | COMPLAINTS | MIDDLE HALF FILED AT | TYPICAL US REPAIR BILLS |
|---|---|---|---|
| Electrical systemSTANDS OUT | 219 (41%) | 73k–114k miles · around this mileage | 12-volt battery replacement $100–$400 · Starter motor replacement $350–$1,200 |
| EngineSTANDS OUT | 116 (22%) | 81k–135k miles · around this mileage | Valve cover gasket replacement $110–$500 · Timing chain replacement $1,000–$4,000 |
| Visibility and wipersSTANDS OUT | 78 (15%) | 80k–113k miles · around this mileage | — |
| Exterior lightingSTANDS OUT | 53 (10%) | 71k–124k miles · around this mileage | — |
| EquipmentSTANDS OUT | 48 (9%) | 71k–110k miles · around this mileage | — |
| Air bags | 18 (3%) | 52k–116k miles · around this mileage | — |
| Fuel system | 15 (3%) | 51k–114k miles · around this mileage | Fuel pump replacement $220–$1,500 · Fuel injector replacement (one injector) $300–$1,200 |
| Speed control | 12 (2%) | 13k–108k miles · around this mileage | — |
| Brakes | 53 (10%) | 10k–50k miles · mostly behind | — |
| Transmission and drivetrain | 21 (4%) | 7k–76k miles · mostly behind | — |
| Seats | 17 (3%) | 40k–73k miles · mostly behind | — |
| Suspension | 9 (2%) | too few with a mileage | — |
| Body structure | 8 (2%) | too few with a mileage | — |
| Engine and cooling | 5 (1%) | too few with a mileage | — |
Bills are typical US ranges from the sources named in the tool (J.D. Power, Kelley Blue Book, CarParts.com and others), printed only for systems that stand out or sit at or ahead of 101,000 miles. Not a quote.
What owners reported alongside their complaints
Of 531 complaints: 15 mention a crash · 5 mention a fire · 4 report an injury · 2 say the car was towed.
1 complaint was filed in the last 12 months, the newest in Sep 2026.
Counts of what owners wrote in their complaints, not verified by anyone.
In owners' own words
Vehicle would randomly stall out at 55 MPH+ and control of power steering is lost (Battery light & VDC light would come on dash), no control of car.
First defect: when I would start my car the lights would go out and the radio, heating and cooling buttons. The fan would come onto high and switch to airconditioning.
Hello, my 2003 Infiniti G35 coupe is experiencing the exact issue that NHTSA campaign number:03V455000 (Infiniti recall no.
Unedited excerpts from complaints filed with NHTSA, chosen by mileage (nearest 101,000 miles), not by content. Unverified.
Recalls for the 2003 Infiniti G35: 7
These service parts are intended for use on model year 2003-2006 Nissan 350Z and Infiniti G35 vehicles. The sx: K70358-01 clutch kit contains an oversized clutch disc. An oversized clutch disc could cause the vehicle to move unintentionally on the initial start-up, if the driver does not follow the installation instructions and fails to use the service brakes while the hand brake is not applied.
Certain aai motorsports combination lamps sold as replacement lamps for use on the above list passenger vehicles. Combination lamps not equipped with amber side reflectors fail to conform with the requirements of federal motor vehicle safety standard no. 108, "Lamps, reflective devices, and associated equipment." Lack of amber side reflectors in the lamps will decrease lighting visibility to other drivers and may possibly result in a vehicle crash
On certain passenger and sport utility vehicles, the fuel filler hose may crack and result in fuel leakage from the hose while refueling. Fuel leakage in the presence of an ignition source could result in a fire.
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. 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.
On certain sedan and coupe model vehicles, the brake stop lamp switch may malfunction. If this occurs, the brake lamps will not illuminate when the brake is applied, which could result in a crash without warning.
Certain sedans fail to comply with the requirements of federal motor vehicle safety standard no. 108, "Lamps, reflective devices, and associated equipment." In the assembly of the headlamps, it is necessary to have a means to adjust the headlamps.
On certain passenger vehicles, the fuel hose connection for the outlet of the fuel pump which is located at the top of the fuel tank may not have been properly attached when the vehicle was assembled and could come loose while driving or when starting the engine. If the connection comes loose while driving, the engine will stop running due to lack of fuel, increasing the risk of a crash.
A recall may cover only some cars of a model year; the campaign size counts every model and year it lists. Enter your VIN at nhtsa.gov/recalls: dealers fix open recalls free.
Service bulletins from Infiniti: 43
Repair instructions Infiniti sent its dealers for symptoms seen in the shop on the 2003 Infiniti G35. Ask a dealer or mechanic for a bulletin by its number.
OBD II EVAP Tube Warranty Enhancement UPDATE August 17, 2018
Replacement 5-speed rear wheel drive Automatic Transmission (A/T) assemblies and replacement control valves…
5 speed a/t DTC diagnoses for P1701, P1702, P1703, P1704, P1705, P1754, P1759, P1764, P1769, P1774
Intelligent key not detected / engine will not start
Neighbouring years
2004 G35: 244 complaints, keep it, but watch the engine.
Every Infiniti G35 year
2002 · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 · All G35 years side by side
Other Infiniti models: Infiniti FX35 · Infiniti G37 · Infiniti I35 · Infiniti JX35 · Infiniti M35 · Infiniti M45 · Infiniti Q50 · Infiniti QX4 · Infiniti QX50 · Infiniti QX56 · Infiniti QX60. All makes and models.
Questions
Is the 2003 Infiniti G35 a bad year?
531 owner complaints to NHTSA. Engine complaints: 121, 6.7× a quiet G35 year. At 101,000 miles the tool says: Keep it, but watch the engine. Half of the engine complaints for this year were filed at 81k–134k miles, where you are now.
What are the most common problems with the 2003 Infiniti G35?
By owner complaints to NHTSA: electrical system (219), engine (116), visibility and wipers (78), exterior lighting (53), equipment (48). Half of the engine complaints were filed between 81k–134k miles.
How many recalls does the 2003 Infiniti G35 have?
7 recall campaigns list this model year: Transmission and drivetrain (NHTSA 11E024000), Exterior lighting (NHTSA 06E060000), Fuel system (NHTSA 05V-555), Engine (NHTSA 03V-455) and more. A recall may cover only some cars; check by VIN at nhtsa.gov/recalls.
Method: counts of unverified owner complaints filed with NHTSA, compared only with other years of the same model (sales volumes are unknown, so no failure rate is computed). A system stands out at 40+ complaints and at least twice the model's quiet (lower-quartile) year, or twice the share across every vehicle of that model year. The mileage range is the 25th to 75th percentile of the mileages owners reported. Data received by NHTSA through November 5, 2026. Repair prices are typical US ranges from named sources, not quotes. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Check this car at your own mileage.