Best and worst Infiniti G35 years (which to avoid)

How we rated the best and worst Infiniti G35 years

We pulled together information from multiple angles to give you the full picture. NHTSA complaint logs showed us which years generated the most owner frustration, while official recall bulletins revealed systemic flaws Infiniti had to fix (cam/crank sensors, airbag wiring, brake light switches). Long-term owner reviews on CarComplaints and Edmunds added real-world context—what breaks at 80k miles versus 150k, what repairs cost, and which issues owners learned to live with versus the ones that forced them to sell.

We also combed through G35Driver and MyG37 forums, where enthusiasts document everything from timing chain tensioner replacement costs to which aftermarket bushings actually last. YouTube mechanic channels provided visual walkthroughs of common failures (Rev-Up engine teardowns, for instance). J.D. Power reliability scores and RepairPal cost data rounded out the research, giving us benchmarks to compare the G35 against rivals like the Acura TL and Lexus IS.

One pattern emerged clearly: oil consumption in manual “Rev-Up” engines and first-year build quality problems (especially on the 2003 model) dominate the complaint landscape. We cross-referenced transmission failure rates between coupe and sedan, automatic and manual, to see if certain configurations were safer bets. The answer? Yes—automatic G35s from the middle and late years tend to dodge the worst issues.

Most Common Infiniti G35 Problems

1. Engine Troubles You Should Know About

The VQ35DE engine is a workhorse that can easily crack 200,000 miles if you stay on top of oil changes and cooling system maintenance. But three recurring issues pop up often enough that you’ll want to inspect any used G35 carefully.

Cam and crank position sensor failures hit 2003–2006 models hard enough that Nissan issued a recall. When these sensors go bad, the car might stall at idle or refuse to start altogether. If you’re looking at an older G35, confirm the recall repair was done—it’s a straightforward sensor swap, but skipping it leaves you stranded.

Timing chain rattle shows up on 2003–2007 G35s, though not every car develops it. You’ll hear a tapping or rattling noise from the front of the engine, usually on cold starts. The culprit is premature wear of the chain guides and tensioners. If the chain gets too loose, it can jump a tooth or snap a guide, leading to expensive internal engine damage. Replacing the chain, guides, and tensioners before catastrophic failure costs $1,200–$1,800 in parts and labor—annoying, but far cheaper than a new engine.

Oil consumption in Rev-Up engines is the big one. Infiniti boosted power in 2005–2006 manual-transmission G35s (and the 2007 coupe) by revising the VQ35 internals and raising the redline. Great for performance, terrible for oil control. Many Rev-Up owners report burning a quart every 1,000–3,000 miles. The root problem lies in piston ring design; short of an engine rebuild or ring replacement, there’s no true fix. Some owners install oil catch cans or upgrade valve covers to reduce (but not eliminate) consumption. If you’re considering a 2005–06 manual or a 2007 coupe, bring a flashlight and check the oil level at your test drive—if it’s low and the seller seems surprised, walk away.

2. Transmission and Drivetrain Quirks

The 5-speed automatic and 6-speed manual transmissions are generally solid, but exceptions exist. Some 2007 sedans (the first year of the redesigned V36 chassis) experienced automatic transmission failures at surprisingly low mileage—one documented case involved a transmission dying around 35,000 miles. Harsh shifting or slipping gears usually point to valve body or solenoid problems; regular fluid changes help, but if an automatic G35 already has shifting issues, budget for a rebuild or replacement.

Manual transmissions face a different challenge: synchro wear, especially in third gear. High-mileage or hard-driven manual G35s often develop a grind when shifting into third. Double-clutching or switching to high-quality fluid (like Redline MT-90) can mask mild synchro wear, but once the grind is pronounced, you’re looking at a transmission rebuild. The AWD G35x adds another layer—monitor the transfer case fluid condition, because neglect there leads to costly repairs.

3. Electrical Gremlins That Frustrate Owners

Early G35s, particularly 2003 models, earned a reputation for electrical headaches. The Bose radio/head unit would fail, taking the climate control system with it (both functions share the same unit). Owners suddenly found themselves unable to adjust cabin temperature or fan speed because the entire center console stack had died. Replacement units aren’t cheap, and you’ll need one from a G35 or 350Z (they’re interchangeable) to restore full functionality.

Dashboard gauges can flicker or display incorrect fuel readings due to bad solder joints on the circuit board. The clock spring in the steering column wears out around 120,000 miles, disabling steering wheel controls for audio and cruise. Infiniti also recalled 2003, 2004, and 2006 G35s for a brake light switch that wouldn’t illuminate the brake lamps when you pressed the pedal—a serious safety issue that also triggers VDC/Slip warning lights.

Power window regulators fail often enough that it’s almost expected on older G35s. Windows get stuck halfway down or move sluggishly. Door lock actuators malfunction with similar frequency. Some 2007–08 owners traced door lock problems back to a defective sunroof assembly; water leaking from clogged sunroof drains apparently seeped into lock circuits. Clearing those drains and sealing the sunroof properly prevented repeat failures.

4. Brakes and Suspension Complaints

Premature brake wear topped the complaint list for 2003 G35s. Original pads and rotors wore or warped so quickly that some owners needed full replacements around 10,000 miles. Infiniti upgraded brake components in later years, and the optional Brembo 4-piston calipers (standard on 2003–04 coupes) offered stronger stopping power—though Brembo pads still dust heavily and wear fast under aggressive driving. Budget for more frequent brake service if your G35 has Brembos; parts are pricier than standard brakes.

Front lower control arm bushings leak or crack surprisingly early—sometimes by 40,000–60,000 miles. Worn bushings cause clunking noises and throw off alignment. Many owners upgrade to polyurethane bushings, which last longer and improve handling feel.

Alignment-related tire wear plagued 2003–04 coupes. Inner tires would develop “feathering” (uneven tread wear) that created a roaring road noise. Nissan issued updated alignment specs and revised suspension parts mid-2004 to fix the issue. If you’re looking at an early coupe, confirm the alignment has been checked and consider adding an aftermarket camber kit if inner tire wear persists.

Steering rack leaks were common on 2003 models. If you see power steering fluid pooling under the car, inspect the rack or high-pressure hose. Replacement isn’t catastrophic, but it’s an added expense on an already aging car.

5. Interior and A/C Annoyances

Dashboard cracks appear on 2007–08 second-gen sedans, usually around the front passenger air vent. Heat and UV exposure accelerate the problem; using a sunshade helps, but once the dash cracks, it’s cosmetic damage you’ll live with (replacement dashes are expensive).

Some owners report a musty odor from the A/C vents. Water can pool in the evaporator housing if the drain tube clogs, leading to mildew growth and a foul smell. Clearing the drain tube and treating the HVAC system with an anti-mold cleaner usually solves it, but the smell can return if you don’t keep up with maintenance.

The DVD-based navigation system in 2003–07 models is outdated now—slow to boot, maps years out of date. No widespread failures are reported; it’s just old tech. The Bose audio system sounds good, but CD changers and speaker amps can fail on high-mileage cars. Burned-out bulbs in the radio/climate display and loose trim pieces are minor fixes you’ll encounter on any 15-year-old car.