The 2008 Infiniti G35x stands as a rare bridge between analog sports car dynamics and all-weather utility, pairing a high-revving 306-horsepower V6 with an intelligent all-wheel-drive system. While many automotive enthusiasts overlook the all-wheel-drive variant in favor of its rear-wheel-drive counterpart, this sedan delivers sharp handling, a mechanical exhaust note, and year-round traction without sacrificing its driver-focused personality.
Under the hood lies the potent VQ35HR engine, a powerplant distinct from earlier iterations that revs freely to a 7,500 RPM redline. Buyers exploring the pre-owned market will find that this model offers compelling performance value, though understanding its mechanical quirks, fuel consumption, and maintenance requirements is essential before making a purchase.
Powertrain and Performance Specs
The heart of the 2008 Infiniti G35x is its 3.5-liter VQ35HR V6 engine, featuring dual overhead cams and continuously variable valve timing. Pumping out 306 horsepower at 6,800 RPM and 268 lb-ft of torque at 4,800 RPM, it moves the sedan from zero to 60 mph in roughly 5.5 seconds. Power routes through a responsive five-speed automatic transmission equipped with downshift rev-matching and magnesium paddle shifters on select trims.
Unlike standard front-wheel-drive platforms, the ATTESA E-TS all-wheel-drive system operates primarily as a rear-wheel-drive setup during normal cruising to preserve traditional sports sedan steering dynamics. When rear wheel slippage occurs, an electromagnetic clutch instantly transfers up to 50 percent of torque to the front wheels. This setup provides predictable cornering balance on dry pavement and secure grip during winter storms. According to specifications from Car and Driver, the suspension utilizes a front double-wishbone and rear multi-link layout tuned for a firm, communicative ride.
Interior Layout and Daily Usability
Inside the cabin, the layout reflects mid-2000s luxury priorities, featuring aluminum or optional genuine African rosewood trim alongside analog gauges. The center stack houses distinct audio and climate controls framed by an amber display screen. While the interface feels dated compared to modern touchscreens, tactile buttons remain easy to operate while driving.
Front bucket seats offer firm lateral support and extensive power adjustments, though taller drivers might find the lower cushion angle restrictive on extended trips. Rear legroom is adequate for adults, but the prominent transmission tunnel required by the all-wheel-drive architecture reduces middle-seat comfort. Trunk space measures 13.5 cubic feet, supplemented by a pass-through opening for longer items, though the rear seatbacks do not fold completely flat.
Common Mechanical Issues to Watch For
While the VQ35HR engine is widely regarded as robust, secondhand examples require careful inspection for specific wear items:
- Gallery Gaskets: Early iterations of the HR engine can occasionally experience internal oil pressure drops if the front timing gallery paper gaskets degrade. Check for stable oil pressure readings at idle.
- Valve Cover Leaks: Rubber gaskets harden over time, leading to minor oil seepage into the spark plug tubes. Replacing them restores proper ignition bay cleanliness.
- Suspension Bushings: Front control arm bushings and sway bar links wear out around 100,000 miles, manifesting as clunking noises over bumps or vague steering feedback.
- Catalytic Converters: Internal substrate breakdown can occur on high-mileage units, triggering a check engine light for oxygen sensor efficiency codes.
Ownership Costs and Fuel Economy
Fuel economy is not the strong suit of this platform. EPA ratings sit at 17 mpg city and 25 mpg highway, and aggressive driving easily drops city figures below 15 mpg. Premium fuel is strictly required.
Maintenance costs align with mid-tier luxury ownership. Routine upkeep involves regular synthetic oil changes every 5,000 miles, differential fluid changes, and periodic brake service. Because the engine uses a steel timing chain rather than a rubber belt, owners avoid expensive interval timing belt replacements. For official recall information and safety notices, consult the NHTSA database.
Frequently Asked Questions
Is the G35x slower than the rear-wheel-drive G35?
Yes, by a slight margin. The all-wheel-drive hardware adds roughly 150 pounds of weight, resulting in marginally slower acceleration times, though the traction gains in adverse weather outweigh the penalty for most drivers.
Does the G35x require premium gasoline?
Yes. The high-compression 10.6:1 engine requires 91 octane or higher fuel to prevent engine knock and maintain optimal power output.
What is the difference between the G35 and G35x?
The standard G utilizes a rear-wheel-drive layout, whereas the G35x features an intelligent all-wheel-drive system, a slightly raised ride height, and standard automatic transmission pairing without a manual gearbox option.
How many miles can a 2008 Infiniti G35x last?
With diligent fluid changes and routine maintenance, the VQ35HR engine regularly surpasses 200,000 miles without major internal overhauls.
