If you're considering a used 2008 Infiniti FX35, understanding its performance, reliability, and common ownership challenges is essential. This model blends sporty handling with luxury comfort, powered by a 3.5L V6 engine producing 293 horsepower and paired with a smooth 5-speed automatic transmission 🚗. However, potential buyers should be aware of known issues like CVT-like symptoms in the transmission, oil leaks from the VQ35DE engine, and aging air suspension components ✅. This guide breaks down everything from real-world fuel economy (17 mpg city / 24 mpg highway) ⛽ to aftermarket upgrade options, helping you evaluate whether this premium crossover still makes sense today.
Overview of the 2008 Infiniti FX35
The 2008 Infiniti FX35 was part of Infiniti’s bold push into the performance-luxury SUV segment. Positioned as a 'sports luxe crossover,' it combined coupe-like styling with all-wheel drive capability and a powerful naturally aspirated V6 engine. Unlike traditional boxy SUVs of the era, the FX35 emphasized dynamic driving with rear-biased torque distribution and available adaptive suspension 🌐. It competed directly with vehicles like the BMW X5 and Porsche Cayenne but offered more aggressive pricing and distinctive design.
Under the hood, the FX35 used Nissan’s renowned VQ35DE 3.5L V6 engine, known for durability and smooth power delivery. With 293 hp and 262 lb-ft of torque, it provided strong acceleration (0–60 mph in around 6.8 seconds), making it one of the quicker midsize luxury SUVs of its time ⚡. All models came with a 5-speed automatic transmission (Jatco JF011E), which, while generally reliable, has exhibited shuddering or delayed shifts in higher-mileage units — a point worth inspecting during pre-purchase evaluation.
The standard drivetrain was rear-wheel drive (RWD), with all-wheel drive (AWD) available as an option. The AWD system operated primarily in RWD mode but could send up to 50% of torque to the front wheels when slippage was detected. This setup balanced efficiency with traction, especially useful in wet or snowy conditions 📍.
Interior Comfort and Technology
Inside, the 2008 FX35 delivered a cockpit-focused layout inspired by aircraft design. High-quality materials covered most surfaces, including optional leather upholstery, wood trim, and aluminum accents ✨. Seating was supportive, particularly in the front where eight-way power adjustment and driver memory settings were standard.
Infotainment features included a Bose audio system, a 7-inch color display, and satellite radio compatibility. While advanced for its day, the system lacks modern conveniences like Bluetooth streaming, Apple CarPlay, or Android Auto ❗. Aftermarket head units are widely available and relatively easy to install due to standardized dash kits, offering a practical upgrade path for tech-savvy owners 🔧.
Rear passenger space is adequate for adults on shorter trips, though headroom can feel tight for taller occupants due to the sloping roofline. Cargo capacity measures approximately 32 cubic feet behind the second row and expands to 65 cubic feet with seats folded — competitive for its class at the time.
Fuel Economy and Real-World Efficiency
According to EPA estimates, the 2008 Infiniti FX35 achieves 17 mpg in the city and 24 mpg on the highway ⛽. In mixed driving scenarios, most owners report averages between 19–21 mpg, depending on terrain and driving habits. Heavier use of AWD or aggressive acceleration will reduce efficiency further.
It requires regular unleaded gasoline (87 octane minimum), although premium fuel (91+ octane) is recommended for optimal performance and long-term engine health. Owners note that using lower-octane fuel over extended periods may lead to slight knocking or reduced responsiveness, especially in hotter climates or under load.
| Category | Specification |
|---|---|
| Engine | 3.5L V6 (VQ35DE) |
| Horsepower | 293 hp @ 6200 rpm |
| Torque | 262 lb-ft @ 4400 rpm |
| Transmission | 5-speed automatic |
| Drivetrain | RWD or AWD |
| City MPG | 17 |
| Highway MPG | 24 |
| Curb Weight | ~4,300 lbs |
| 0–60 mph | ~6.8 seconds |
Common Mechanical Issues and Reliability Concerns
While the 2008 FX35 is generally regarded as a solid performer, several recurring issues have emerged among long-term owners:
- Transmission Shudder: Some units develop a noticeable vibration during light acceleration between 35–45 mph. This often stems from worn torque converter clutches or degraded fluid condition. Regular fluid changes (every 60k miles) can help prevent or delay this issue.
- Oil Leaks: The VQ35DE engine is prone to valve cover gasket leaks, especially beyond 80,000 miles. These typically appear around the spark plug tubes and can lead to misfires if not addressed promptly.
- Air Suspension Failures: Optional electronic air suspension systems (available on higher trims) frequently fail due to leaking air springs or compressor burnout. Replacement parts are costly, and many owners opt for conversion kits to conventional coil springs.
- Brake Wear: Due to the vehicle's weight and performance orientation, brake pads and rotors wear faster than average. Front brakes may need replacement every 30,000–40,000 miles under normal use.
- Electrical Gremlins: Aging wiring harnesses and sensors can cause intermittent warning lights, HVAC malfunctions, or navigation screen glitches.
Regular maintenance plays a critical role in longevity. Following the factory service schedule — including coolant flushes, timing belt inspections (though interference-free), and differential fluid changes — significantly improves long-term reliability.
Maintenance Schedule and Ownership Costs
Annual maintenance costs for the 2008 Infiniti FX35 average between $500 and $700, slightly above non-luxury counterparts. Major services include:
- Oil Change: Every 5,000–7,500 miles (~$75–$120)
- Brake Pad Replacement: Every 30k–40k miles (~$300–$500)
- Transmission Fluid Flush: Recommended every 60k miles (~$200–$300)
- Air Filter: Every 30k miles (~$50)
- Coolant Flush: Every 60k miles (~$150)
- Suspension Components: If equipped with air suspension, expect repairs starting around 80k–100k miles ($800–$2,000 total)
Parts availability remains good through OEM dealers, independent suppliers, and specialty import vendors. Many components are shared with Nissan models (e.g., Maxima, Pathfinder), allowing for cost-effective alternatives without sacrificing quality 🏭.
Aftermarket Upgrades and Accessories
Owners commonly enhance their 2008 FX35 with both aesthetic and functional modifications. Popular upgrades include:
- Performance Exhaust Systems: Cat-back exhausts improve sound and offer minor horsepower gains (~5–10 hp).
- Lowering Springs or Coilovers: Enhance handling and reduce body roll.
- Alloy Wheels: Larger diameter rims (20–22 inches) with low-profile tires are popular, though they may increase road noise and ride harshness.
- LED Lighting Conversions: Replace halogen headlights and interior bulbs with brighter, longer-lasting LEDs.
- Dash Covers and Floor Mats: Protect interiors from UV damage and spills; custom-fit options widely available 🧼.
- Roof Racks and Cargo Management: Useful for outdoor enthusiasts needing extra carrying capacity.
When selecting accessories, ensure compatibility with the 2003–2008 FX35/FX45 platform. Many aftermarket brands offer model-specific fitments, reducing installation complexity.
Safety Ratings and Crash Test Performance
The 2008 Infiniti FX35 received favorable safety ratings during its release cycle. According to the National Highway Traffic Safety Administration (NHTSA), it earned a 5-star rating for frontal driver protection and 4 stars for side impact protection 1. The Insurance Institute for Highway Safety (IIHS) did not conduct full testing on this model year, but structural similarities to other Nissan platforms suggest moderate-to-good crashworthiness.
Standard safety features included dual-stage front airbags, side-impact airbags, curtain airbags, anti-lock brakes (ABS), and Vehicle Dynamic Control (VDC) — Infiniti’s version of electronic stability control. Traction control and hill-start assist were also included, enhancing control on slippery surfaces.
Resale Value and Depreciation Trends
Like most luxury vehicles of its era, the 2008 FX35 has experienced significant depreciation. As of 2024, clean examples sell between $6,000 and $10,000 depending on mileage, condition, and trim level. Fully loaded models with AWD and navigation command slight premiums.
Depreciation stabilized after 2018, meaning current values fluctuate within a narrow range. Well-maintained units retain value better than those with spotty service records or major mechanical issues. Given its age, rarity does not significantly influence price — unlike some modern classics.
Buying Tips: What to Look For
Purchasing a used 2008 FX35 requires careful inspection. Here are key steps to follow:
- Review Service History: Check for consistent oil changes, transmission servicing, and coolant replacements.
- Test Drive Thoroughly: Pay attention to transmission behavior, steering response, and any unusual noises.
- Inspect for Oil Leaks: Look under the hood and beneath the engine for signs of seepage, especially near valve covers.
- Check Air Suspension Operation: If equipped, verify that the vehicle levels properly and listen for continuous compressor cycling.
- Scan for Error Codes: Use an OBD-II scanner to detect stored codes related to engine, transmission, or ABS systems.
- Examine Tires and Brakes: Uneven wear may indicate alignment or suspension problems.
A pre-purchase inspection by a qualified mechanic familiar with Japanese luxury vehicles is highly recommended. This investment (~$150–$200) can uncover hidden issues and save thousands in future repairs.
Comparison with Similar Models
The 2008 FX35 competes closely with several contemporaries:
- BMW X5 (E53/E70): Offers sharper handling and superior build quality but comes with higher maintenance costs and greater complexity.
- Lexus GX 470: More off-road capable and extremely reliable, though less engaging to drive and heavier on fuel.
- Acura MDX: Focused on family usability and third-row seating, but less powerful and dynamically oriented.
- Porsche Cayenne (first gen): Superior performance and prestige, but much higher acquisition and repair costs.
The FX35 stands out for balancing emotional appeal with reasonable running costs, especially compared to German rivals. Its unique blend of style, speed, and everyday usability continues to attract niche buyers.
Frequently Asked Questions (FAQ)
Here are answers to common questions about the 2008 Infiniti FX35:
- Can the 2008 Infiniti FX35 tow? Yes, it has a towing capacity of up to 3,500 pounds when properly equipped, suitable for small trailers or jet skis.
- Is the VQ35DE engine reliable? Generally yes — it's one of Nissan’s most durable engines, provided it receives regular maintenance and isn’t subjected to overheating.
- Are parts expensive or hard to find? No, many components are interchangeable with Nissan models, keeping replacement costs manageable.
- Does it require premium gas? Not strictly — it runs on 87-octane fuel, but 91+ is advised for best performance and long-term engine cleanliness.
- How does it handle in snow? With AWD and VDC, it performs well in light to moderate winter conditions, though wide tires may reduce traction in deep snow.
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