The Infiniti FX35, launched in 2003, represented a bold entry into the burgeoning luxury crossover segment. Specifically, the first generation FX (designated FX I, chassis Y33) with the 3.5-liter V6 engine and five-speed automatic transmission, produced from 2003 to 2006, aimed to blend the performance of a sports car with the practicality of an SUV. This variant occupied a mid-range position within the initial FX lineup, offering a balance between the base 3.0-liter model (available in some markets) and the later, more powerful FX45. The FX35 was Infiniti’s attempt to capture a younger, more active demographic seeking a stylish and capable vehicle.
Technical Specifications
| Brand | Infiniti |
| Model | FX |
| Generation | FX I |
| Type (Engine) | 35 V6 24V (283 Hp) |
| Start of production | 2003 |
| End of production | 2006 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Crossover |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 13.9 l/100 km (16.9 US mpg) |
| Fuel consumption (extra urban) | 10.2 l/100 km (23.1 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.1 sec |
| Acceleration 0 – 62 mph | 7.1 sec |
| Acceleration 0 – 60 mph | 6.7 sec |
| Maximum speed | 221 km/h (137.32 mph) |
| Weight-to-power ratio | 6.7 kg/Hp |
| Weight-to-torque ratio | 5.2 kg/Nm |
| Power | 283 Hp @ 6200 rpm |
| Torque | 366 Nm @ 4800 rpm (269.95 lb.-ft. @ 4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | VQ35DE |
| Engine displacement | 3498 cm3 (213.46 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 95.5 mm (3.76 in.) |
| Piston Stroke | 81.4 mm (3.2 in.) |
| Compression ratio | 10.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 4.7 l (4.97 US qt | 4.14 UK qt) |
| Coolant capacity | 8.6 l (9.09 US qt | 7.57 UK qt) |
| Kerb Weight | 1890 kg (4166.74 lbs.) |
| Max. weight | 2342 kg (5163.23 lbs.) |
| Max load | 452 kg (996.49 lbs.) |
| Trunk (boot) space – minimum | 776 l (27.4 cu. ft.) |
| Trunk (boot) space – maximum | 1826 l (64.48 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 4803 mm (189.09 in.) |
| Width | 1925 mm (75.79 in.) |
| Height | 1651 mm (65 in.) |
| Wheelbase | 2850 mm (112.2 in.) |
| Front track | 1593 mm (62.72 in.) |
| Rear track | 1640 mm (64.57 in.) |
| Number of gears | 5 |
| Gearbox type | Automatic transmission |
Powertrain & Engine Architecture
The heart of the FX35 is the VQ35DE 3.5-liter V6 engine. This engine, a member of Nissan’s highly regarded VQ family, is a 60-degree V-engine featuring aluminum alloy cylinder heads and block. It utilizes a dual overhead camshaft (DOHC) design with four valves per cylinder, contributing to its strong power output. The VQ35DE employs multi-port fuel injection, delivering fuel directly into each intake port. The engine’s 283 horsepower at 6200 rpm and 269.95 lb-ft of torque at 4800 rpm were respectable figures for its time. The five-speed automatic transmission, designated as the RE5R31A, was chosen for its smooth operation and reliability. While not offering the driver engagement of a manual transmission, it provided convenient shifting and was well-suited to the vehicle’s intended luxury crossover role.
Driving Characteristics
The FX35 with the automatic transmission delivered a comfortable and capable driving experience. Acceleration from 0-60 mph in around 6.7 seconds was competitive for the class. The automatic transmission, while smooth, wasn’t particularly quick to downshift, resulting in a slightly less responsive feel compared to the available manual transmission (in some markets). The gear ratios were tuned for a balance of acceleration and fuel economy. The engine provided ample power for highway merging and passing maneuvers, but lacked the outright punch of the FX45’s larger V8. The rear-wheel-drive configuration contributed to a balanced feel, although it could be prone to oversteer in challenging conditions.
Equipment & Trim Levels
The FX35 typically came standard with a generous array of features, including leather upholstery, power-adjustable front seats, a premium sound system, automatic climate control, and alloy wheels. Optional extras included a navigation system, sunroof, and upgraded audio options. The interior design emphasized a sporty and modern aesthetic, with a driver-focused cockpit. Trim levels were relatively simple, with most FX35s being well-equipped from the factory. The focus was on providing a luxurious and comfortable experience without the higher price tag of the FX45.
Chassis & Braking
The FX35 utilized a fully independent suspension system, with a McPherson strut setup at the front and a multi-link configuration at the rear. This provided a comfortable ride while maintaining good handling characteristics. Stabilizer bars were fitted both front and rear to reduce body roll during cornering. Braking duties were handled by disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) was standard, enhancing safety and control. The FX35’s chassis was designed to provide a stable and secure platform, balancing comfort and performance.
Market Reception & Comparison
The Infiniti FX35 was generally well-received by automotive critics. It was praised for its distinctive styling, comfortable interior, and strong performance. However, some reviewers noted the automatic transmission’s lack of responsiveness and the rear-wheel-drive configuration’s potential for oversteer. Compared to competitors like the BMW X5 and Acura MDX, the FX35 offered a more aggressive styling and a sportier driving experience at a slightly lower price point. Fuel economy was average for the class, with combined figures around 18 mpg. Reliability was generally good, although some owners reported minor issues with the automatic transmission over time.
Legacy
The first-generation Infiniti FX35 established the brand’s reputation for bold design and sporty performance. The VQ35DE engine proved to be a durable and reliable powerplant, and many FX35s remain on the road today. While the automatic transmission may not be as desirable as the manual version to some enthusiasts, it remains a dependable unit. In the used car market, the FX35 offers a compelling value proposition, providing a luxurious and capable crossover at an affordable price. Its distinctive styling and engaging driving dynamics continue to appeal to buyers seeking a vehicle that stands out from the crowd. The FX35 laid the groundwork for future generations of Infiniti crossovers, solidifying the brand’s position in the luxury SUV segment.
