2006 Infiniti M III (Y50) Dimensions, Size & Specs

The Infiniti M III (Y50) sedan comes with a width between 1795 mm and 1806 mm (70.7 to 71.1 inches). This width ensures a stable road presence and contributes to its luxurious and sporty stance. The relatively moderate width balances interior space — giving front and rear passengers comfortable shoulder room — against easy maneuvering in urban environments and parking facilities, making it a practical luxury car in terms of width.

The height of the Infiniti M III (Y50) ranges from 1509 mm to 1525 mm (59.4 to 60 inches). This height provides generous headroom for occupants, enhancing passenger comfort, especially for taller individuals. Its balanced height also contributes to aerodynamic efficiency, supporting stable high-speed driving and reducing wind noise. The combination of interior roominess and aerodynamic form makes the M III both comfortable and performance-oriented.

The curb weight of the Infiniti M III (Y50) ranges between 1787 kg and 1875 kg (3939 to 4133 lbs). This weight reflects the car's premium build quality, including luxury features and safety equipment. While heavier than compact sedans, its powertrain options are tuned to deliver smooth yet potent acceleration and confident handling. The weight distribution and chassis dynamics work together to provide a balanced driving experience, aligning with the expectations of a luxury sport sedan.

The Infiniti M III (Y50) offers rear luggage capacity ranging from 388 liters to 422 liters (approximately 13.7 to 14.9 cubic feet) when the rear seats are folded down. This capacity is quite practical for a luxury sedan, allowing owners to carry larger luggage or bulky items when needed. The flexible cargo space enhances the car’s practicality, making it suitable for weekend trips, business travel, or daily errands.

The Infiniti M III (Y50) is equipped with tires sized 245/45 R18. These are relatively wide tires for an executive sedan, providing a good contact patch with the road which improves grip, cornering stability, and braking performance. The 18-inch diameter strikes a balance between sportiness and ride comfort, ensuring that the vehicle delivers a dynamic driving experience without sacrificing luxury and smoothness.

Yes, the Infiniti M III (Y50) fits comfortably into a standard residential garage. With its length up to 4935 mm (194.3 inches or approximately 16.2 feet), width up to 1806 mm (71.1 inches or roughly 5.9 feet), and height up to 1525 mm (60 inches or 5 feet), it is well within the typical garage dimensions. Most single-car garages offer at least 5.5 to 6 meters (18 to 20 feet) in length and 2.5 to 3 meters (8 to 10 feet) in width, so parking the M III is convenient for everyday home use.

Compared to its predecessor, the Infiniti M II, the M III (Y50) is slightly larger across key dimensions, indicating an evolution in both interior space and road presence. While exact predecessor dimensions vary by year, the M III’s length increased to around 4892-4935 mm (192.5-194.3 in) from the M II’s shorter length generally in the 4800 mm range, width grew slightly to up to 1806 mm (71.1 in), and height stayed relatively similar but was optimized for aerodynamics and cabin comfort. These dimensional updates brought improved passenger comfort and a more commanding stance while refining the sleek executive sedan profile.

The Infiniti M III (Y50) is competitive in size and features when compared to contemporaries such as the BMW 5 Series (E60) and the Mercedes-Benz E-Class (W211). Dimensionally, the M III’s length (4892-4935 mm / 192.5-194.3 in) and width (1795-1806 mm / 70.7-71.1 in) place it squarely in the mid-size luxury sedan segment. The BMW 5 Series and Mercedes E-Class have similar lengths ranging from approximately 4850 mm to 4900+ mm, making them comparable. The Infiniti distinguishes itself with a strong V6 or V8 powertrain, a well-appointed interior featuring luxury materials and cutting-edge infotainment for its time, and a balanced ride combining sportiness with comfort. Though maybe less widely known than its German rivals, it delivers excellent value, blending upscale luxury with distinctive Japanese refinement.

The Infiniti M III (Y50) generation marked a significant step forward in design, technology, and performance for Infiniti’s executive sedan line. Launched in 2005 with model years 2006 to 2010, it featured a sleek, modern exterior styling blending elegant curves with aggressive front grille and headlight designs. Notably, it introduced advanced technology options for its time, including adaptive cruise control, lane departure warning, and a premium Bose audio system. Under the hood, various engine options including powerful V6 and V8 engines delivered impressive performance for the segment. The interior focused on premium materials, comfortable seating, and a driver-centric cockpit. Overall, the M III was praised for combining luxury, technology, and performance in a competitive mid-size luxury sedan package.