The Infiniti M III (Y50) 35i, produced from 2008 to 2010, represented a significant step forward for Infiniti’s mid-size luxury sedan. Positioned as a performance-oriented variant within the Y50 generation – which spanned from 2005 to 2010 – the 35i offered a compelling blend of power, refinement, and technology. It served as the primary volume seller for the M series in North America, appealing to buyers seeking a sporty alternative to established German rivals. The Y50 platform was a thorough redesign of the previous J30, aiming for a more modern and engaging driving experience.
Technical Specifications
| Brand | Infiniti |
| Model | M |
| Generation | M III (Y50) |
| Type (Engine) | 35 i V6 24V (307 Hp) |
| Start of production | 2008 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 17.9 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 | 6.4 sec |
| Acceleration 0 – 62 mph | 6.4 sec |
| Acceleration 0 – 60 mph | 6.1 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Weight-to-power ratio | 6.1 kg/Hp, 164.3 Hp/tonne |
| Weight-to-torque ratio | 4 kg/Nm, 247.9 Nm/tonne |
| Power | 307 Hp @ 6800 rpm |
| Power per litre | 87.8 Hp/l |
| Torque | 463 Nm @ 4800 rpm (341.49 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 | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Coolant capacity | 9.2 l (9.72 US qt | 8.09 UK qt) |
| Kerb Weight | 1868 kg (4118.24 lbs.) |
| Trunk (boot) space – maximum | 388 l (13.7 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Length | 4935 mm (194.29 in.) |
| Width | 1795 mm (70.67 in.) |
| Height | 1509 mm (59.41 in.) |
| Wheelbase | 2900 mm (114.17 in.) |
| Front track | 1535 mm (60.43 in.) |
| Rear track | 1535 mm (60.43 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 7 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 M35i was Nissan’s VQ35HR 3.5-liter V6 engine. This engine, a member of the highly-regarded VQ family, was known for its smooth power delivery and reliability. The “HR” designation signified a high-revolution version, featuring revised cylinder heads, a strengthened block, and variable valve timing on both intake and exhaust camshafts (VVEL). This configuration produced 307 horsepower at 6800 rpm and 341 lb-ft of torque at 4800 rpm. Fuel was delivered via multi-port fuel injection. The engine was longitudinally mounted, driving the rear wheels. Paired with the VQ35HR was a 7-speed automatic transmission, offering manual shift control. This transmission was chosen for its responsiveness and ability to handle the engine’s power output.
Driving Characteristics
The 35i offered a noticeably more engaging driving experience than the base M35 with the standard engine. The 7-speed automatic transmission allowed for quick shifts and kept the engine in its optimal power band. While not as overtly sporty as some European competitors, the M35i provided a comfortable yet capable ride. The rear-wheel-drive configuration contributed to balanced handling, and the suspension was tuned to provide a good compromise between comfort and control. Acceleration from 0-60 mph was consistently reported around 6.1 seconds, making it a quick contender in its class. The automatic transmission, while generally smooth, could occasionally feel hesitant during downshifts.
Equipment & Trim Levels
The M35i typically came well-equipped, positioning it as a mid-to-upper trim level. Standard features included leather upholstery, power-adjustable front seats with memory function, a premium Bose audio system, a navigation system, and automatic climate control. Optional extras included a power-adjustable steering column, rear-seat entertainment, and advanced safety features like lane departure warning and intelligent cruise control. Interior color options typically included black, beige, and gray leather. Dashboard trim could be wood or metallic finishes.
Chassis & Braking
The Y50 M series utilized a robust chassis with an independent McPherson strut front suspension and an independent multi-link rear suspension. Stabilizer bars were fitted at both ends to reduce body roll. Braking duties were handled by ventilated discs on all four wheels, providing ample stopping power. The M35i came standard with ABS (Anti-lock Braking System) and electronic brake-force distribution. The suspension tuning was geared towards providing a comfortable ride without sacrificing handling precision.
Market Reception & Comparison
The Infiniti M35i was generally well-received by automotive critics. It was praised for its powerful engine, comfortable interior, and generous features list. However, some reviewers noted that the styling was somewhat conservative compared to its European rivals. Compared to the base M35, the 35i offered a significant performance upgrade, justifying the higher price tag for those seeking a more engaging driving experience. Fuel economy, at around 18.7 US mpg combined, was typical for a V6-powered luxury sedan of its time. Reliability was generally good, with the VQ35HR engine proving to be a durable and long-lasting powerplant.
Legacy
The Infiniti M35i (Y50) remains a relatively affordable and reliable luxury sedan in the used car market. The VQ35HR engine is known for its longevity, and with proper maintenance, these cars can provide many years of service. While not as technologically advanced as newer vehicles, the M35i still offers a comfortable and enjoyable driving experience. Its blend of performance, luxury, and value has made it a popular choice among enthusiasts seeking a well-rounded and dependable used car.
