The 2007 Infiniti G35 is powered by the VQ35DE 3.5-liter V6 and was offered in sedan and coupe body styles. While regarded as a solid performer, aging components can surface as common problems, particularly with higher-mileage examples. Below is a concise overview of frequently reported issues, followed by more detail, diagnosis tips, and preventive maintenance guidance.
Common 2007 G35 problems include oil leaks from valve covers and rear main seal, automatic transmission issues such as harsh shifting or slipping, ignition coil pack failures, electrical gremlins (ABS/traction control sensors), power steering leaks or pump noise, cooling system leaks, and suspension wear.
The 2007 Infiniti G35 uses the VQ35DE 3.5-liter V6 and was offered in sedan and coupe form. With age, wear-prone components show up as leaks, noises, and warning lights. This article outlines the most frequently reported trouble spots, common symptoms, and practical steps to diagnose and address them, plus preventive maintenance to reduce risk.
Engine and powertrain issues
Issues tied to the engine and transmission components that frequently appear as cars age.
Common symptoms and indicators
- Oil leaks from valve cover gaskets, rear main seal, and oil pan gasket, often accompanied by a noticeable slick around the engine bay or on the ground.
- Oil consumption and smells of burning oil; some owners report higher than expected oil use as seals or rings wear.
- Carbon buildup on intake valves and throttle body can cause rough idle, misfires, or reduced performance.
- Timing chain tensioner/guide wear can produce a light rattle on startup or at idle; may require chain/tensioner service if symptoms persist.
- Ignition coil packs or spark plugs can fail, triggering misfires and check-engine codes (P0300-series).
- PCV valve and crankcase ventilation issues that alter vacuum and idle quality.
Regular maintenance addressing leaks, seals, and valve train components can prevent more serious damage and maintain smooth operation.
Transmission and drivetrain
Automatic transmissions in the 2007 G35 can experience shifting issues, and manual variants have their own wear concerns. The 5-speed automatic is the most common configuration for this year.
Common symptoms and indicators
- Harsh, delayed, or slipping shifts as hydraulic circuits age; fluid condition is a key factor.
- Torque converter shudder or slipping during acceleration, sometimes mistaken for engine problems.
- Transmission fluid leaks from seals or pan gasket; burnt smell or degraded fluid can accompany symptoms.
- Clutch wear and grinding in manual transaxles (where equipped) affecting engagement and pedal feel.
Diagnosis typically involves checking fluid level and condition, scanning for transmission-related codes, and listening for unusual noises. Professional service may be required for valve body or solenoid issues or to address worn seals.
Electrical and interior electronics
Electrical issues can surface as warning lights, dim gauges, or intermittent function across comfort and safety systems. Modern electronics in the G35 age differently from the drivetrain.
Common symptoms and indicators
- ABS/ASC/traction-control warning lights due to wheel-speed sensor faults or ABS module issues.
- Instrument cluster flicker, dim dash lighting, or intermittent warning lights.
- Power window regulator or motor failure causing slow movement or stalling windows.
- Sunroof drain clogs or leaks (where applicable), leading to water intrusion and interior damage.
Diagnosis with a scan tool helps identify sensor or module faults; many electrical issues resolve with sensor replacements, connector reseating, or regulator repairs.
Suspension, steering and brakes
Wear in suspension components and steering hardware is common as cars accumulate miles, affecting handling, ride quality, and safety.
Common symptoms and indicators
- Front and rear suspension bushings, control arms, and ball joints wear, producing clunks, poor alignment, or irregular tire wear.
- Wheel bearings can develop play or noise, especially at speed.
- Brake rotors warp or pads wear unevenly, causing pulsing or reduced braking performance.
- Steering rack boots or seals may leak; power steering pump can whine if fluid is low or the pump wears.
Regular inspection of suspension components and alignment, along with timely replacement of worn parts, helps maintain handling and safety.
Maintenance and preventive tips
Proactive maintenance tailored to the 2007 G35 can reduce the likelihood of common problems becoming serious. The following actions are commonly recommended by technicians and experienced owners.
Key maintenance actions
- Follow the manufacturer’s service intervals for fluids (engine oil, transmission fluid, coolant) and use quality parts.
- Inspect valve cover gaskets, rear main seal, and oil pan gaskets for leaks; address small leaks early.
- Test and replace worn ignition coils or spark plugs to prevent misfires and rough running.
- Check PCV valve and intake components for buildup; clean or replace as needed.
- Periodically check transmission fluid level and condition; replace if dark or burnt; seek professional service for shifting issues.
- Inspect braking system: pads, rotors, and fluid; service as needed to maintain braking performance.
- Inspect suspension components for wear and replace worn parts (bushings, control arms, wheel bearings) as needed.
- Keep tires properly inflated and perform regular wheel alignments to prevent uneven tire wear.
- Check electrical connectors and fuses; diagnose warning lights with a scan tool and repair faulty sensors or modules.
With consistent maintenance and prompt attention to issues, a 2007 G35 can remain reliable and enjoyable to drive for many more miles.
Summary
The 2007 Infiniti G35 offers solid performance and comfort, but owners should be mindful of age-related patterns such as oil leaks, transmission symptoms, ignition and electrical faults, and suspension wear. By staying on top of leaks, fluid health, sensor function, and component wear, you can diagnose and address problems early, preserving performance and value. Always consult a qualified technician for a precise diagnosis and consider reviewing recalls or service campaigns that may apply to your vehicle.