The BMW X6 (F16) M50d, produced from 2014 to 2018, represents a compelling blend of luxury, performance, and efficiency within the X6 model range. Positioned as a high-end variant, the M50d occupied the space between the more mainstream X6 models and the full-fledged X6 M performance vehicle. It aimed to deliver a significant performance upgrade over the lower-powered options while maintaining a degree of everyday usability and improved fuel economy compared to the gasoline-powered X6 M. The F16 generation X6, built on the BMW X platform, was notable for its controversial yet popular coupe-like SUV styling, and the M50d was a key driver in establishing the X6’s image as a sophisticated and capable vehicle.
Technical Specifications
| Brand | BMW |
| Model | X6 |
| Generation | X6 (F16) |
| Type (Engine) | M50d (381 Hp) xDrive Steptronic |
| Start of production | 2014 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 7.2 l/100 km (32.7 US mpg, 39.2 UK mpg, 13.9 km/l) |
| Fuel consumption (extra urban) | 6.3 l/100 km (37.3 US mpg, 44.8 UK mpg, 15.9 km/l) |
| Fuel consumption (combined) | 6.6 l/100 km (35.6 US mpg, 42.8 UK mpg, 15.2 km/l) |
| CO2 emissions | 174 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.2 sec |
| Acceleration 0 – 62 mph | 5.2 sec |
| Acceleration 0 – 60 mph | 4.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5.7 kg/Hp, 174.4 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 338.7 Nm/tonne |
| Power | 381 Hp @ 4000-4400 rpm |
| Power per litre | 127.3 Hp/l |
| Torque | 740 Nm @ 2000-3000 rpm (545.8 lb.-ft. @ 2000-3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N57D30C |
| Engine displacement | 2993 cm3 (182.64 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 16:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 15.4 l (16.27 US qt | 13.55 UK qt) |
| Kerb Weight | 2185 kg (4817.1 lbs.) |
| Max. weight | 2900 kg (6393.41 lbs.) |
| Max load | 715 kg (1576.31 lbs.) |
| Trunk (boot) space – minimum | 550 l (19.42 cu. ft.) |
| Trunk (boot) space – maximum | 1525 l (53.85 cu. ft.) |
| Fuel tank capacity | 85 l (22.45 US gal | 18.7 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2700 kg (5952.48 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 140 kg (308.65 lbs.) |
| Length | 4909 mm (193.27 in.) |
| Width | 1989 mm (78.31 in.) |
| Width including mirrors | 2170 mm (85.43 in.) |
| Height | 1702 mm (67.01 in.) |
| Wheelbase | 2933 mm (115.47 in.) |
| Front track | 1640 mm (64.57 in.) |
| Rear (Back) track | 1700 mm (66.93 in.) |
| Front overhang | 890 mm (35.04 in.) |
| Rear overhang | 1086 mm (42.76 in.) |
| Ride height (ground clearance) | 212 mm (8.35 in.) |
| Drag coefficient (Cd) | 0.36 |
| Minimum turning circle (turning diameter) | 12.8 m (41.99 ft.) |
| Approach angle | 25.0° |
| Departure angle | 22.5° |
| Ramp-over (brakeover) angle | 20.0° |
| Wading depth | 500 mm (19.69 in.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 255/50 R19; 285/45 R19 |
| Wheel rims size | 9J x 19; 10J x 19 |
Powertrain & Engine Architecture
The heart of the X6 M50d is the N57D30C engine, a 3.0-liter inline-six diesel engine. This engine is a highly sophisticated design featuring a twin-turbocharger setup – one low-pressure turbo and one high-pressure turbo – working in sequence to minimize turbo lag and deliver a broad, flat torque curve. The engine utilizes a common-rail direct fuel injection system, injecting fuel at extremely high pressures for optimized combustion. The N57 engine family is known for its robust construction and ability to handle significant power upgrades. The M50d’s version benefits from reinforced internal components to cope with the increased output. The engine is longitudinally mounted at the front of the vehicle. The eight-speed Steptronic automatic transmission, a BMW staple, is specifically tuned to handle the high torque output of the diesel engine. It offers smooth and quick shifts, contributing to both performance and efficiency. The transmission features steering wheel-mounted paddle shifters for manual control.
Driving Characteristics
The X6 M50d delivers a remarkably refined driving experience. The abundant 740 Nm (545.8 lb-ft) of torque available from just 2000 rpm provides effortless acceleration in virtually any situation. The 0-60 mph sprint takes around 4.9 seconds, making it genuinely quick for a large SUV. The eight-speed automatic transmission is well-matched to the engine, providing seamless gear changes and keeping the engine in its optimal power band. Compared to the gasoline-powered X6 variants, the M50d offers superior fuel economy and a more relaxed cruising experience. While not as overtly sporty as the X6 M, the M50d provides ample performance for spirited driving. The xDrive all-wheel-drive system ensures excellent traction and stability in all weather conditions.
Equipment & Trim Levels
The M50d trim level came generously equipped as standard. Interior features typically included leather upholstery, power-adjustable front seats with memory function, a premium sound system, and a navigation system with a large iDrive display. Standard exterior features included unique M Sport styling cues, such as aggressive front and rear bumpers, side skirts, and larger alloy wheels. Optional extras included features like adaptive suspension, panoramic sunroof, head-up display, and various driver-assistance systems. The interior ambiance was generally luxurious, with high-quality materials and a focus on comfort.
Chassis & Braking
The X6 M50d features a double-wishbone front suspension and an independent multi-link rear suspension, providing a comfortable yet controlled ride. The suspension is tuned to balance handling and ride quality, offering a good compromise for a vehicle of its size and weight. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. The ABS (Anti-lock Braking System) and stability control systems are standard, enhancing safety and control. The X6 M50d’s chassis is designed to handle the increased weight and power of the M50d variant, providing a stable and confident driving experience.
Market Reception & Comparison
The X6 M50d was generally well-received by automotive critics. It was praised for its strong performance, refined driving experience, and impressive fuel economy for a vehicle of its size and capability. Compared to the X6 xDrive35i, the M50d offered a significant performance upgrade. Compared to the X6 M, the M50d provided a more balanced combination of performance, efficiency, and comfort, appealing to buyers who wanted a high-performance SUV but didn’t necessarily need the ultimate track-focused experience. Reliability reports suggest the N57 engine is generally robust, although diesel particulate filter (DPF) issues can occur with infrequent long-distance driving.
Legacy
The BMW X6 M50d represents a significant step in the evolution of the performance diesel SUV. Its combination of power, efficiency, and luxury established a benchmark in its segment. On the used car market, the F16 X6 M50d remains a desirable option for buyers seeking a capable and refined SUV. While maintenance costs for a complex diesel engine can be higher than for gasoline counterparts, the N57 engine’s robust design and readily available parts supply contribute to its long-term reliability. The X6 M50d continues to be appreciated for its unique blend of performance and practicality.
