The Infiniti M III (Y50) 35i V6 24V AWD, produced from 2008 to 2010, represents the second generation of Infiniti’s mid-size luxury sedan. Positioned as a key model in Infiniti’s lineup, the Y50 aimed to compete with established European and domestic rivals like the BMW 5 Series, Mercedes-Benz E-Class, and Cadillac CTS. This particular variant, the 35i with all-wheel drive and an automatic transmission, served as a strong mid-range offering, balancing performance with comfort and all-weather capability. It was built on the Nissan FM platform, shared with the Nissan Fuga, and represented a significant step forward in design and technology for the brand.
Technical Specifications
| Brand | Infiniti |
| Model | M |
| Generation | M III (Y50) |
| Type | 35 i V6 24V AWD (303 Hp) |
| Start of production | 2008 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 17.7 l/100 km (13.3 US mpg, 16 UK mpg) |
| Fuel consumption (extra urban) | 12.9 l/100 km (18.2 US mpg, 21.9 UK mpg) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.1 kg/Hp, 164.7 Hp/tonne |
| Weight-to-torque ratio | 5.2 kg/Nm, 192.9 Nm/tonne |
| Power | 303 Hp @ 6800 rpm |
| Power per litre | 86.6 Hp/l |
| Torque | 355 Nm @ 4800 rpm (261.83 lb.-ft. @ 4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | VQ35HR |
| Engine displacement | 3498 cm3 (213.46 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 5.8 l (6.13 US qt | 5.1 UK qt) |
| Coolant capacity | 9.2 l (9.72 US qt | 8.09 UK qt) |
| Kerb Weight | 1840 kg (4056.51 lbs.) |
| Trunk (boot) space – maximum | 388 l (13.7 cu. ft.) |
| Fuel tank capacity | 75 l (19.81 US gal | 16.5 UK gal) |
| Length | 4930 mm (194.09 in.) |
| Width | 1806 mm (71.1 in.) |
| Height | 1524 mm (60 in.) |
| Wheelbase | 2900 mm (114.17 in.) |
| Front track | 1552 mm (61.1 in.) |
| Rear track | 1541 mm (60.67 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 | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 245/45 R18 |
Powertrain & Engine Architecture
The heart of the 35i variant is the Nissan VQ35HR 3.5-liter V6 engine. This engine is a naturally aspirated, 24-valve DOHC powerplant known for its smooth operation and robust reliability. The “HR” designation signifies “High Revolution,” indicating a focus on higher engine speeds and improved breathing. It utilizes a multi-port fuel injection system and a variable valve timing system (VVEL) to optimize performance and fuel efficiency across the rev range. The engine produces 303 horsepower at 6800 rpm and 355 Nm (261.83 lb-ft) of torque at 4800 rpm. Paired with this engine is a 5-speed automatic transmission, designed to provide smooth shifts and responsive acceleration. While not as sporty as some of the competition’s transmissions, it was well-suited to the M35i’s intended role as a comfortable and capable luxury sedan.
Driving Characteristics
The 35i AWD model delivers a balanced driving experience. The automatic transmission, while not offering manual control in the early models, provides seamless gear changes. Acceleration is brisk, with the V6 providing ample power for highway merging and passing maneuvers. The all-wheel-drive system enhances traction, particularly in inclement weather, making it a confident performer in a variety of conditions. Compared to the rear-wheel-drive version, the AWD model offers increased stability, but at a slight cost to fuel economy. Compared to potential higher-performance variants (had Infiniti offered them on the Y50 platform), the 35i prioritizes refinement and ease of use over outright sportiness. The gear ratios are tuned for comfortable cruising rather than aggressive acceleration.
Equipment & Trim Levels
The Infiniti M35i typically came standard with a generous array of features, including leather upholstery, power-adjustable front seats, a premium audio system, automatic climate control, and a navigation system. Optional extras included a rear-seat entertainment system, adaptive cruise control, and a power-closing trunk. The interior design emphasized luxury and comfort, with high-quality materials and a well-appointed cabin. Trim levels were relatively simple, with most options available as standalone additions rather than distinct packages.
Chassis & Braking
The Y50 M35i features an independent suspension system at all four corners. The front utilizes a McPherson strut setup with coil springs and an anti-roll bar, while the rear employs a multi-link configuration, also with coil springs and a stabilizer bar. This suspension setup provides a comfortable ride while maintaining good handling characteristics. Braking duties are handled by ventilated discs on all four wheels, coupled with an Anti-lock Braking System (ABS) for enhanced safety. The standard tire size is 245/45 R18, providing a good balance of grip and ride comfort.
Market Reception & Comparison
The Infiniti M35i was generally well-received by automotive critics. It was praised for its comfortable ride, spacious interior, and strong engine performance. However, some reviewers noted that the interior design, while luxurious, lacked the visual flair of some European competitors. Fuel economy was also a point of criticism, with the 3.5-liter V6 consuming a significant amount of fuel, especially in urban driving. Compared to the rear-wheel-drive M35, the AWD version offered increased all-weather capability but came with a slight penalty in fuel efficiency and price. Against rivals like the BMW 5 Series and Mercedes-Benz E-Class, the M35i offered a compelling value proposition, providing a similar level of luxury and performance at a lower price point.
Legacy
The Infiniti M35i (Y50) has proven to be a relatively reliable vehicle, with the VQ35HR engine being particularly well-regarded for its durability. Common maintenance items include routine oil changes, fluid flushes, and occasional sensor replacements. The automatic transmission is generally reliable, but proper maintenance is crucial to prevent issues. On the used car market, the Y50 M35i represents a good value for buyers seeking a comfortable and well-equipped luxury sedan. While it may not have the brand cachet of some European rivals, it offers a compelling combination of performance, features, and reliability at an attractive price point. The Y50 platform laid the groundwork for future Infiniti models, establishing the brand as a serious contender in the luxury car segment.
