The 2008 G35 with the VQ35HR is a solid sports sedan when maintained, but Gallery gasket failures, transmission cooler leaks, and worn bushings/mounts plague high-mileage examples. That engine rebuild data tells the real story—oil starvation from neglected Gallery gasket kills motors.
VQ35HR Gallery Gasket Oil Leak & Engine Failure
Common · high severityTypical onset: 80,000-130,000 mi
Symptoms: Oil leaking from rear of engine valve covers, pooling on transmission bellhousing, Low oil level despite no visible external leaks underneath vehicle, Sudden catastrophic engine failure—spun bearings, scored cylinders—if oil level drops unnoticed, Oil consumption increasing beyond 1 qt per 1,000 mi
Fix: Gallery gasket sits between block and heads at the rear; requires pulling engine or transmission to access. Smart shops pull motor. 12-16 hours labor for gasket replacement, but if you ignored it and spun bearings, you're looking at short block or full rebuild.
Estimated cost: $2,200-3,500 for gasket alone; $5,500-8,500 for engine rebuild after failure
Transmission Oil Cooler Line & Radiator Failure
Common · high severityTypical onset: 70,000-110,000 mi
Symptoms: Transmission fluid leaking from radiator area or lines to cooler, Strawberry milkshake appearance in radiator—coolant mixing with ATF, Erratic shifting, slipping, or complete transmission failure after cross-contamination, Pink fluid pooling under front of vehicle
Fix: Factory radiator has internal trans cooler that fails, allowing coolant into ATF. Must replace radiator, flush transmission multiple times, replace cooler lines, and pray the trans internals survived. If milkshake happened, trans rebuild is likely. Prevention: external trans cooler bypasses the radiator. 4-6 hours for radiator/lines, add 12-18 hours if trans needs rebuild.
Estimated cost: $800-1,400 for radiator/lines/flush; $2,800-4,500 if transmission is damaged
Transmission Mount & Differential Bushing Failure
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Clunk or thud when shifting from Park to Drive or Reverse to Drive, Vibration through shifter and center console at idle, Clunking over bumps from rear differential area, Excessive driveline movement visible during hard acceleration
Fix: Transmission mount is hydraulic and fails internally. Differential front and rear bushings crack from age/heat. Trans mount is 2-3 hours, diff bushings require subframe drop or diff removal, 4-6 hours. Many shops do all mounts/bushings together since labor overlaps.
Estimated cost: $600-1,200 for trans mount and engine mounts; $800-1,500 for diff bushings with subframe drop
Lower Control Arm Bushings & Ball Joints
Common · medium severityTypical onset: 70,000-120,000 mi
Symptoms: Clunking from front suspension over bumps or during turns, Steering wheel off-center after hitting potholes, Uneven or feathered inner tire wear, Vague or wandering steering feel, especially in corners
Fix: Front lower control arms use press-fit bushings that separate or tear. Ball joints wear and develop play. Infiniti sells only complete arms—no serviceable bushings. Replace both sides at once, 3-4 hours labor, alignment required after.
Estimated cost: $900-1,400 for both front lower control arms plus alignment
Fuel Pump & Fuel Level Sender Failure
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Fuel gauge reading empty when tank is full or erratic/jumping needle, No-start condition or engine dies while driving—no fuel pressure, Whining or buzzing noise from rear seat area fuel tank, Hesitation or stumble under hard acceleration
Fix: Fuel pump module includes pump and level sender; both fail independently. Requires dropping fuel tank or removing rear seat and access panel depending on shop preference. 2.5-4 hours labor. Use OEM or quality aftermarket—cheap pumps fail quickly.
Estimated cost: $650-1,100 for pump module replacement
Window Regulator & Motor Failure
Occasional · low severityTypical onset: 60,000-100,000 mi
Symptoms: Window slow to move up or down, or stops mid-travel, Grinding, clicking, or rattling noise when operating window, Window drops into door or sits crooked in frame, Complete failure—window won't move at all
Fix: Plastic regulator gears strip or cables fray. Motor can also fail. Door panel removal and regulator replacement, 2-3 hours per door. Driver side fails most often from frequent use.
Estimated cost: $400-700 per door for regulator and motor assembly
Buy one if maintenance records prove Gallery gasket and trans cooler were addressed—skip it if history is unknown or these jobs were deferred, because you're buying someone else's impending catastrophe.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.