Infiniti G35 Sedan 2003 Specs

The 2003 Infiniti G35 Sedan marked a significant turning point for the brand, signaling a shift towards a more performance-oriented image and offering a compelling alternative to established luxury sport sedans. While visually appealing, the G35's true strength lay in its engineering. Let's delve into the technical specifications that defined this iconic vehicle.

Powertrain: The Heart of the G35

At the core of the 2003 G35 resided the VQ35DE engine, a member of Nissan's venerable VQ engine family. This 3.5-liter, naturally aspirated V6 was a marvel of its time, praised for its smooth power delivery, robust torque, and overall reliability. Its specifications are as follows:

Configuration: 60-degree V6
Displacement: 3498 cc (213.5 cu in)
Bore x Stroke: 95.5 mm x 81.4 mm (3.76 in x 3.20 in)
Compression Ratio: 10.3:1
Valve Train: DOHC, 4 valves per cylinder, Continuously Variable Valve Timing Control System (CVTCS) on intake valves
Fuel Delivery: Multi-point fuel injection
Horsepower: 260 hp @ 6,000 rpm (base model) / 280 hp @ 6,200 rpm (models with manual transmission or Sport Package)
Torque: 260 lb-ft @ 4,800 rpm (base model) / 270 lb-ft @ 4,800 rpm (models with manual transmission or Sport Package)

The CVTCS played a crucial role in optimizing engine performance across the rev range. By continuously adjusting the intake valve timing, the engine could improve both low-end torque and high-end horsepower. This resulted in a broad, usable powerband, making the G35 enjoyable to drive in various conditions.

The engine was available with two transmission options:

5-Speed Automatic: A conventional torque converter automatic, providing smooth and effortless gear changes. It also featured a manual shift mode for increased driver control.
6-Speed Manual: This option was available on select models and catered to enthusiasts seeking a more engaging driving experience. The manual transmission allowed drivers to fully exploit the VQ35DE's potential.

Rear-wheel drive was standard, reinforcing the G35's sporting intentions. This configuration provided a more balanced driving experience and contributed to the car's nimble handling characteristics. An all-wheel-drive variant was not available in 2003.

Chassis and Suspension: Balanced Dynamics

The G35's chassis was based on Nissan's FM (Front Midship) platform. This design philosophy positioned the engine further back in the chassis, behind the front axle line. This arrangement significantly improved weight distribution, resulting in enhanced handling and reduced understeer. The FM platform also provided a rigid foundation for the suspension system.

The suspension system consisted of:

Front: Independent double-wishbone suspension with coil springs and stabilizer bar.
Rear: Independent multi-link suspension with coil springs and stabilizer bar.

The double-wishbone front suspension offered excellent wheel control and precise handling. The multi-link rear suspension provided a comfortable ride while maintaining stability during cornering. The stabilizer bars helped to reduce body roll, further enhancing the car's agility.

The Sport Package, available on some models, included a sport-tuned suspension with stiffer springs and dampers. This further improved handling performance, making the G35 an even more capable sports sedan.

The G35 also featured vehicle speed-sensitive power steering, which provided varying levels of assistance depending on the vehicle's speed. This system offered light steering effort at low speeds for easy maneuverability and increased steering feel at higher speeds for enhanced stability.

Brakes: Stopping Power

The 2003 G35 was equipped with four-wheel disc brakes, providing ample stopping power. The brake system included:

Front: Ventilated discs
Rear: Solid discs
Anti-lock Braking System (ABS): Prevents wheel lockup during hard braking, allowing the driver to maintain steering control.
Electronic Brakeforce Distribution (EBD): Optimizes brake force distribution between the front and rear wheels, maximizing stopping power and stability.
Brake Assist: Detects emergency braking situations and applies maximum braking force, even if the driver does not fully depress the brake pedal.

The ABS, EBD, and Brake Assist systems worked together to provide a safe and controlled braking experience in various driving conditions.

Dimensions and Weight: Balanced Proportions

The G35's dimensions contributed to its athletic stance and spacious interior:

Wheelbase: 112.2 inches (2850 mm)
Length: 186.2 inches (4730 mm)
Width: 70.7 inches (1795 mm)
Height: 57.7 inches (1465 mm)
Curb Weight: Approximately 3,336 lbs (1513 kg) (varies depending on options)

These dimensions resulted in a well-proportioned sedan with a relatively low center of gravity, further contributing to its agile handling.

Interior and Electronics: Comfort and Technology

The G35's interior featured a driver-focused design with intuitive controls and high-quality materials. Standard features included:

Automatic climate control
Power windows and locks
Cruise control
AM/FM stereo with CD player

Optional features included:

Leather seats
Bose premium audio system
Sunroof
Navigation system

The G35 also incorporated several electronic systems designed to enhance safety and convenience, including:

Vehicle Dynamic Control (VDC): Helps to prevent loss of control by applying individual brakes and reducing engine power when necessary.
Traction Control System (TCS): Prevents wheel spin during acceleration, improving traction and stability.

Conclusion: A Technical Triumph

The 2003 Infiniti G35 Sedan was more than just a stylish car; it was a carefully engineered machine. From its powerful VQ35DE engine to its balanced chassis and sophisticated electronic systems, the G35 represented a significant step forward for Infiniti. Its success can be attributed to its well-integrated components and a focus on delivering a genuinely engaging driving experience. By combining performance, luxury, and technology, the G35 carved out a unique niche in the competitive sport sedan market and remains a respected vehicle to this day. Its lasting impact is a testament to the solid engineering principles upon which it was built.

Understanding these technical specifications provides a deeper appreciation for the engineering that went into creating the 2003 Infiniti G35 Sedan, solidifying its place as a notable vehicle in automotive history.