The Infiniti M III (Y50) 35i, produced from 2005 to 2008, represented a significant step forward for Nissan’s luxury brand in the mid-size luxury sedan segment. Positioned as a competitor to the BMW 5 Series, Mercedes-Benz E-Class, and Lexus GS, the Y50 M aimed to deliver a blend of performance, comfort, and distinctive styling. The 35i variant, equipped with the 3.5-liter V6 engine and a five-speed automatic transmission, served as the primary offering for the North American market, balancing power with relative affordability within the M lineup. It was the first generation of the M to be sold in the US, marking Infiniti’s serious intent in challenging the established European luxury brands.
Technical Specifications
| Brand | Infiniti |
| Model | M |
| Generation | M III (Y50) |
| Type (Engine) | 35i V6 24V (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) | 17.9 l/100 km (13.1 US mpg, 15.8 UK mpg, 5.6 km/l) |
| Fuel consumption (extra urban) | 9.6 l/100 km (24.5 US mpg, 29.4 UK mpg, 10.4 km/l) |
| Fuel consumption (combined) | 12.6 l/100 km (18.7 US mpg, 22.4 UK mpg, 7.9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.9 sec |
| Acceleration 0 – 62 mph | 6.9 sec |
| Acceleration 0 – 60 mph | 6.6 sec |
| Maximum speed | 224 km/h (139.19 mph) |
| Weight-to-power ratio | 6.7 kg/Hp, 149.9 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 195.9 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 capacity | 8.9 l (9.4 US qt | 7.83 UK qt) |
| Kerb Weight | 1868 kg (4118.24 lbs.) |
| Trunk (boot) space – maximum | 388 l (13.7 cu. ft.) |
| Fuel tank capacity | 76 l (20.08 US gal | 16.72 UK gal) |
| Length | 4900 mm (192.91 in.) |
| Width | 1795 mm (70.67 in.) |
| Height | 1510 mm (59.45 in.) |
| Wheelbase | 2900 mm (114.17 in.) |
| Front track | 1530 mm (60.24 in.) |
| Rear (Back) track | 1545 mm (60.83 in.) |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 5 gears, automatic transmission |
| Tires size | 245/45 R18 |
Powertrain & Engine Architecture
The heart of the 35i was Nissan’s VQ35DE 3.5-liter V6 engine. This engine, a member of the highly-regarded VQ family, was known for its smooth operation, robust construction, and willingness to rev. The VQ35DE featured a 60-degree V-angle, dual overhead camshafts (DOHC) with variable valve timing (VVT), and multi-port fuel injection. Producing 280 horsepower at 6200 rpm and 270 lb-ft of torque at 4800 rpm, the engine provided ample power for comfortable cruising and spirited driving. The five-speed automatic transmission, while not as sporty as a manual, was tuned for smooth shifts and responsive performance. It featured adaptive shift control, adjusting shift points based on driving conditions and throttle input. The engine was mounted longitudinally, driving the rear wheels, a configuration favored for balanced handling.
Driving Characteristics
The 35i offered a comfortable and refined driving experience. The automatic transmission, while not offering the direct control of a manual, provided smooth and predictable gear changes. Acceleration from 0-60 mph was achieved in around 6.6 to 6.9 seconds, making it competitive within its class. Compared to the later, more powerful 37i variant, the 35i felt less urgent in its acceleration, but the difference was often subtle in everyday driving. The rear-wheel-drive layout contributed to balanced handling, although the relatively soft suspension tuning prioritized comfort over outright sportiness. The steering was precise and well-weighted, providing a confident feel on the road.
Equipment & Trim Levels
The 35i typically came well-equipped with standard features including leather upholstery, power-adjustable front seats, a premium audio system, automatic climate control, and alloy wheels. Optional extras included a navigation system, a sunroof, and upgraded audio options. The interior design was modern and luxurious, with a focus on high-quality materials and a driver-centric layout. Trim levels were relatively simple, with most variations stemming from the addition of optional packages rather than distinct model designations.
Chassis & Braking
The Y50 M utilized a fully independent suspension system, with double wishbones at the front and a multi-link setup at the rear. This configuration provided a comfortable ride and good handling characteristics. Brakes were ventilated discs on all four wheels, providing ample stopping power. Anti-lock brakes (ABS) and electronic brake-force distribution (EBD) were standard features. The rear suspension on some base models utilized drum brakes, but most 35i models were equipped with rear disc brakes. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The Infiniti M III 35i was generally well-received by automotive critics. It was praised for its comfortable ride, spacious interior, and strong engine. However, some reviewers noted that the automatic transmission could feel slightly sluggish at times, and the handling wasn’t as sharp as some of its European competitors. Fuel economy was average for the class, with combined figures around 18.7 US mpg. Compared to the higher-output 37i variant, the 35i offered a more affordable entry point into the M lineup, appealing to buyers who prioritized comfort and value over outright performance. The 35i also offered better fuel economy than the 37i.
Legacy
The Infiniti M III 35i has proven to be a relatively reliable vehicle, with the VQ35DE engine being known for its durability. Common maintenance items include routine oil changes, timing chain inspection (though generally robust, they can wear over high mileage), and occasional sensor replacements. On the used car market, the Y50 M 35i represents a good value proposition, offering a luxurious and well-equipped sedan at an affordable price. While not as sought-after as some of its European rivals, the M 35i remains a capable and comfortable grand tourer, offering a unique blend of Japanese engineering and luxury features.
