2003 Infiniti FX I Dimensions, Size & Specs

The Infiniti FX I has a curb weight ranging between 1890 kg and 1960 kg (4167 to 4321 lbs), depending on trim levels and equipment options. The maximum weight, which includes the vehicle's gross weight with passengers and cargo, ranges from 2342 kg to 2427 kg (5164 to 5354 lbs). This weight reflects the substantial construction, luxury features, and engine sizes found in the FX I, supporting a balance between performance and comfort. The SUV's weight influences handling dynamics, fuel economy, and towing capacity, aligning it with competitive midsize luxury SUVs of its production era.

The Infiniti FX I offers a practical luggage capacity suited for various lifestyle needs. With the rear seats in their upright position, the cargo volume is 776 liters (27.4 cubic feet), which is sufficient for daily grocery runs or weekend bags. When folding the rear seats down, the luggage capacity dramatically increases to 1826 liters (64.5 cubic feet), providing ample room for larger cargo such as sports equipment, luggage for extended trips, or bulky items. This flexibility makes the FX I versatile for families and active users who require adaptable storage solutions.

The Infiniti FX I’s dimensions allow it to fit into a standard residential garage, but with limited extra space. A typical single-car garage measures approximately 2.4 to 3.0 meters (7.9 to 9.8 feet) in width and around 6 meters (20 feet) in length. The FX I measures 4803 mm (4.8 meters or 15.7 feet) in length and 1925 mm (1.9 meters or 6.3 feet) in width, which means it fits lengthwise comfortably but occupies much of the width. Maneuvering inside the garage might require some caution due to limited extra room on the sides. Overall, it fits well for garages designed with midsize SUVs in mind.

The Infiniti FX I was Infiniti’s first generation of the FX series, launched in 2003, so it effectively acted as a new model introducing a sportier luxury SUV concept rather than directly succeeding a similar predecessor. However, compared to earlier Infiniti SUVs like the QX4, the FX I is longer and wider, measuring 4803 mm in length and 1925 mm in width versus the QX4’s shorter and more compact footprint. This increase in dimensions reflects Infiniti’s focus on delivering enhanced road presence, roomier interiors, and a more dynamic design language, setting the FX apart as a more performance-oriented luxury SUV.

When compared with contemporaries in the midsize luxury SUV market from 2003 to 2006, such as the BMW X5, Mercedes-Benz ML-Class, and Audi Q7, the Infiniti FX I holds its own in terms of size. The FX I’s length of 4803 mm (189.1 inches) and width of 1925 mm (75.8 inches) are comparable to the BMW X5 E53, which measures roughly 4700 mm (185 inches) in length and 1890 mm (74.4 inches) wide. This situates the FX I as slightly longer and wider than some rivals, potentially offering more interior space and cargo capacity. Its stylish and sporty design also differentiated it aesthetically, targeting buyers looking for both utility and a dynamic image.

The Infiniti FX I commonly comes equipped with 265/60 R18 tires. These tires feature a width of 265 mm, an aspect ratio of 60%, and fit on 18-inch diameter wheels. This tire size offers a balance between performance and ride comfort: the relatively wide tread provides enhanced grip and stability, especially in cornering and at higher speeds, while the 60% aspect ratio ensures sufficient sidewall height to absorb bumps and maintain a comfortable ride quality. The choice of an 18-inch wheel further balances sporty aesthetics with everyday usability, complementing the FX I’s luxury sport SUV character.

The Infiniti FX I’s height varies between 1651 mm (65.0 inches) and 1674 mm (65.9 inches). These differences can be attributed to optional features such as adjustable suspension systems and variations in tire profiles. Some FX I models come with adaptive or sport-tuned suspensions, which can alter ride height slightly based on driving conditions or comfort settings. Additionally, aftermarket modifications or different trim-specific wheel and tire combinations may affect the height measurement. This small height range ensures the vehicle maintains a low-slung sporty profile compared to more traditional SUVs, aiding in improved handling and aerodynamics.

The Infiniti FX I was designed as a pioneering midsize luxury SUV with a strong emphasis on sporty performance, dynamic styling, and advanced technology. It featured powerful V6 and V8 engine options that delivered spirited acceleration, combined with a sport-tuned suspension for enhanced handling. Inside, it offered luxury amenities such as leather upholstery, premium audio systems, and driver assistance features that were competitive for its era. Its distinctive coupe-like roofline and aggressive front fascia set it apart visually, targeting buyers who desired both utility and a sporty, distinctive image in the luxury SUV market.

The Infiniti FX I balances its sporty design with practical interior space and versatile cargo options. The SUV provides ample room for front and rear passengers, contributing to comfort on longer drives. Cargo space is a highlight, with 776 liters (27.4 cubic feet) available behind the rear seats for everyday cargo needs. By folding down the rear seats, cargo capacity expands significantly to 1826 liters (64.5 cubic feet), allowing the transport of larger items such as furniture, bicycles, or extensive luggage. This versatility ensures that, despite its sporty exterior and performance focus, the FX I remains a practical choice for families and active lifestyles.