The Infiniti M III (Y50) 35i V6 24V AWD, produced from 2005 to 2008, represented Infiniti’s entry into the mid-size luxury sedan segment, aiming to compete with established European and domestic rivals. This variant, powered by the robust VQ35DE engine and paired with a five-speed automatic transmission, served as a key model within the Y50 generation, offering a balance of performance, luxury, and all-weather capability through its standard all-wheel-drive system. It occupied a mid-range position in the M lineup, positioned above the base 3.5 models but below the higher-performance 4.5 variants.
Technical Specifications
| Brand | Infiniti |
| Model | M |
| Generation | M III (Y50) |
| Type (Engine) | 35 i V6 24V AWD (280 Hp) |
| Start of production | 2005 |
| End of production | 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 13.9 l/100 km (16.9 US mpg, 20.3 UK mpg, 7.2 km/l) |
| Fuel consumption (extra urban) | 9.8 l/100 km (24 US mpg, 28.8 UK mpg, 10.2 km/l) |
| Fuel consumption (combined) | 13.6 l/100 km (17.3 US mpg, 20.8 UK mpg, 7.4 km/l) |
| 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 | 209 km/h (129.87 mph) |
| Weight-to-power ratio | 6.7 kg/Hp, 149.3 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 195.2 Nm/tonne |
| Power | 280 Hp @ 6200 rpm |
| Power per litre | 80 Hp/l |
| 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 |
| Valvetrain | DOHC |
| Engine oil capacity | 4.7 l (4.97 US qt | 4.14 UK qt) |
| Coolant | 8.9 l (9.4 US qt | 7.83 UK qt) |
| Kerb Weight | 1875 kg (4133.67 lbs.) |
| Trunk (boot) space – maximum | 422 l (14.9 cu. ft.) |
| Fuel tank capacity | 76 l (20.08 US gal | 16.72 UK gal) |
| Length | 4892 mm (192.6 in.) |
| Width | 1798 mm (70.79 in.) |
| Height | 1525 mm (60.04 in.) |
| Wheelbase | 2900 mm (114.17 in.) |
| Front track | 1530 mm (60.24 in.) |
| Rear (Back) track | 1545 mm (60.83 in.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 5 gears, automatic transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 245/45 R18 |
INTRODUCTION
The Infiniti M III (Y50) 35i AWD, launched in 2005, was a significant step for the brand, representing a move towards a more refined and technologically advanced luxury experience. Built on the Nissan FM platform (also known as the 1HX0/A3 platform), the Y50 generation M aimed to deliver a compelling alternative to established European competitors like the BMW 5 Series and Mercedes-Benz E-Class. The 35i variant, with its 3.5-liter V6 engine and all-wheel-drive system, was positioned as a versatile option, appealing to buyers seeking a blend of performance and all-weather confidence. Production of this specific configuration continued through the 2008 model year.
Powertrain & Engine Architecture
At the heart of the 35i model lies the VQ35DE 3.5-liter V6 engine. This engine, a member of Nissan’s highly regarded VQ family, is a 24-valve, dual overhead camshaft (DOHC) design. It utilizes a multi-port fuel injection system and a naturally aspirated intake, producing 280 horsepower at 6200 rpm and 270 lb-ft of torque at 4800 rpm. The engine’s aluminum block and cylinder heads contribute to its relatively lightweight construction. The five-speed automatic transmission, designated as the 5AT, was the sole transmission option for this variant. This transmission featured adaptive shift control, attempting to learn the driver’s habits and adjust shift points accordingly. While not as sophisticated as some contemporary transmissions, it provided smooth and reliable operation.
Driving Characteristics
The 35i AWD offered a comfortable and capable driving experience. Acceleration from 0-60 mph was achieved in approximately 6.7 seconds, making it reasonably quick for its class. The automatic transmission, while smooth, wasn’t particularly sporty, prioritizing comfort over aggressive shifting. The all-wheel-drive system provided excellent traction in various conditions, enhancing stability and confidence, especially in inclement weather. Compared to the rear-wheel-drive M35, the AWD version offered a more secure feel, but at the expense of some fuel economy and a slightly heavier overall weight. The 35i’s power delivery was linear and predictable, making it easy to modulate in everyday driving situations. It lacked the outright punch of the M45’s V8, but offered sufficient power for most drivers.
Equipment & Trim Levels
The 35i AWD typically came standard with a generous array of features, including leather upholstery, power-adjustable front seats, a premium Bose audio system, automatic climate control, and a sunroof. Standard safety features included ABS, traction control, and multiple airbags. Optional extras included navigation system, rear-seat DVD entertainment, and upgraded interior trim packages. The interior design was generally considered elegant and well-appointed, although some materials felt less premium than those found in European competitors. The dashboard layout was straightforward and user-friendly.
Chassis & Braking
The Y50 M featured an independent suspension system at all four corners. The front suspension utilized a McPherson strut design with coil springs and an anti-roll bar, while the rear employed a multi-link setup, also with coil springs and a stabilizer bar. This suspension configuration provided a comfortable ride quality, effectively absorbing bumps and irregularities in the road surface. Braking duties were handled by disc brakes on all four wheels, equipped with ABS. The braking system provided adequate stopping power, although some reviewers noted a slightly soft pedal feel.
Market Reception & Comparison
The Infiniti M III 35i AWD was generally well-received by automotive critics. It was praised for its comfortable ride, spacious interior, and strong engine. However, some reviewers criticized its somewhat bland styling and the lack of a manual transmission option. Compared to the M45, the 35i offered a more affordable entry point into the M lineup, but with less power and prestige. Fuel economy was average for its class, with combined figures around 17-18 mpg. Reliability was generally good, although some owners reported minor issues with the automatic transmission and electrical components.
Legacy
The Infiniti M III 35i AWD has aged reasonably well, and well-maintained examples can still be found on the used car market. The VQ35DE engine is known for its durability and longevity, making it a relatively reliable powertrain. While not as sought-after as some of its European rivals, the M35i offers a compelling value proposition for buyers seeking a comfortable, well-equipped, and capable luxury sedan. Its all-wheel-drive system continues to be a desirable feature, particularly in regions with harsh winters. The Y50 generation M laid the foundation for Infiniti’s continued success in the luxury segment, establishing the brand as a credible alternative to the established players.
