2003 Infiniti M II (Y34) Dimensions, Size & Specs

The Infiniti M II (Y34) has a curb weight of 1790 kilograms (approximately 3946 pounds), which refers to the weight of the car without passengers or cargo but including necessary operating consumables like oil and fuel. The maximum weight, or gross vehicle weight rating (GVWR), stands at 2190 kilograms (around 4828 pounds), which is the maximum permissible loaded weight of the vehicle including passengers and cargo.

This generation of the Infiniti M offers a luggage capacity of 380 liters (about 13.4 cubic feet). This capacity is competitive within the midsize luxury sedan segment, providing ample storage for typical travel or daily use. Compared to similar models, it offers slightly better or comparable trunk space, balancing passenger comfort with cargo practicality.

The Infiniti M II (Y34) rides on standard tires sized 235/45 R18. This tire size offers a balance between performance and comfort, providing good grip and stability for a luxury sedan. The relatively low profile of these tires enhances handling precision, while the 18-inch wheel diameter supports a smooth ride suitable for both spirited driving and everyday commuting.

Yes, the Infiniti M II (Y34) sedan, with its length of 5009 mm (197.2 inches), width of 1770 mm (69.7 inches), and height of 1463 mm (57.6 inches), generally fits comfortably into a standard residential garage. Most single-car garages have dimensions of about 3 meters wide by 6 meters deep (approximately 9.8 by 19.7 feet), so the M II's dimensions allow for adequate clearance on all sides for door opening and maneuvering.

Compared to the predecessor, the Infiniti M I (P10), the M II (Y34) grew notably in size. The length increased to 5009 mm from the previous model's 4850 mm (about 191 inches), width extended to 1770 mm from roughly 1760 mm (69.7 vs. 69.3 inches), and height slightly decreased or remained similar. This size increase translates into a more spacious interior and enhanced road presence, reflecting Infiniti's move towards a more luxurious and comfortable sedan.

In comparison to contemporaries like the BMW 5 Series (E39) and the Lexus GS of the early 2000s, the Infiniti M II (Y34) was often longer but slightly narrower or comparable in width. For example, the BMW E39 measures about 4828 mm in length, roughly 1800 mm wide, and the Lexus GS is around 4910 mm long and 1820 mm wide. Thus, the Infiniti M II offers a more extended profile with a slightly narrower stance, emphasizing rear passenger legroom and dynamic proportions.

Given its overall length of 5009 mm and width of 1770 mm, the Infiniti M II (Y34) provides a roomy interior for front and rear passengers. These dimensions allow for generous legroom and shoulder room, contributing heavily to passenger comfort on longer drives. The sedan’s height of 1463 mm supports ample headroom while retaining a sleek, aerodynamic roofline. The spaciousness contributes directly to the car’s reputation as a luxurious and comfortable midsize executive sedan.

While ground clearance specifics for the Infiniti M II (Y34) vary slightly based on suspension choice and market, typical values are around 150 mm (5.9 inches). This height balances sporty handling characteristics with everyday usability, allowing the vehicle to navigate common road obstacles and speed bumps without compromising ride quality. The 18-inch tires also help absorb bumps, working with the suspension to improve overall comfort and performance.

Beyond its size and comfort, the Infiniti M II (Y34) stood out with luxury appointments and advanced technologies for its era. It featured upgraded interior materials, ergonomic design focused on driver and passenger comfort, and advanced safety features including multiple airbags and stability control systems. The styling was modern yet elegant, with smooth lines that emphasized its aerodynamic qualities and conveyed a premium image consistent with Infiniti’s brand positioning in the early 2000s luxury market.