The BMW X6 (G06) 40i xDrive Steptronic, produced from November 2019 to December 2020, represents a significant iteration of BMW’s Sports Activity Coupe (SAC). Positioned as a mid-range offering within the G06 X6 lineup, it bridged the gap between the entry-level 30i models and the high-performance M50i. This variant aimed to deliver a balance of performance, luxury, and efficiency, appealing to buyers seeking a versatile and capable SUV with a sporting character. The G06 generation marked the third iteration of the X6, continuing the model’s distinctive sloping roofline and coupe-like profile that set it apart from traditional SUVs.
Technical Specifications
| Brand | BMW |
| Model | X6 |
| Generation | X6 (G06) |
| Type (Engine) | 40i (340 Hp) xDrive Steptronic |
| Start of production | November, 2019 |
| End of production | December, 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SAC |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 9.6-10.1 l/100 km (24.5 – 23.3 US mpg) |
| Fuel consumption (extra urban) | 7.0-7.8 l/100 km (33.6 – 30.2 US mpg) |
| Fuel consumption (combined) | 8.0-8.6 l/100 km (29.4 – 27.4 US mpg) |
| CO2 emissions | 181-197 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.5 sec |
| Acceleration 0 – 62 mph | 5.5 sec |
| Acceleration 0 – 60 mph | 5.2 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d-Temp |
| Weight-to-power ratio | 6.6 kg/Hp, 152.1 Hp/tonne |
| Weight-to-torque ratio | 5 kg/Nm, 201.3 Nm/tonne |
| Power | 340 Hp @ 5500-6500 rpm |
| Power per litre | 113.4 Hp/l |
| Torque | 450 Nm @ 1500-5200 rpm (331.9 lb.-ft. @ 1500-5200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30C |
| Engine displacement | 2998 cm3 (182.95 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Valvetrain | VALVETRONIC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 12.6 l (13.31 US qt | 11.09 UK qt) |
| Kerb Weight | 2235 kg (4927.33 lbs.) |
| Max. weight | 2975 kg (6558.75 lbs.) |
| Max load | 740 kg (1631.42 lbs.) |
| Trunk (boot) space – minimum | 580 l (20.48 cu. ft.) |
| Trunk (boot) space – maximum | 1530 l (54.03 cu. ft.) |
| Fuel tank capacity | 83 l (21.93 US gal | 18.26 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 3500 kg (7716.18 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 140 kg (308.65 lbs.) |
| Length | 4935 mm (194.29 in.) |
| Width | 2004 mm (78.9 in.) |
| Width including mirrors | 2212 mm (87.09 in.) |
| Height | 1696 mm (66.77 in.) |
| Wheelbase | 2975 mm (117.13 in.) |
| Front track | 1678 mm (66.06 in.) |
| Rear (Back) track | 1698 mm (66.85 in.) |
| Front overhang | 878 mm (34.57 in.) |
| Rear overhang | 1082 mm (42.6 in.) |
| Ride height (ground clearance) | 216 mm (8.5 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle (turning diameter) | 12.6 m (41.34 ft.) |
| 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 |
| Power steering | Electric Steering |
| Tires size | 265/50 R19 110W XL |
| Wheel rims size | 9J x 19 |
Powertrain & Engine Architecture
The heart of the X6 40i is BMW’s B58B30C 3.0-liter inline-six engine. This engine is a member of the modular B-series engine family, known for its robust construction and sophisticated technology. It utilizes direct fuel injection, a twin-scroll turbocharger, and BMW’s VALVETRONIC variable valve timing and lift system. VALVETRONIC allows for precise control of valve timing and lift, optimizing engine efficiency and responsiveness. The B58 engine produces 340 horsepower at 5500-6500 rpm and 450 Nm (331.9 lb-ft) of torque between 1500 and 5200 rpm. This power is delivered to all four wheels via BMW’s xDrive all-wheel-drive system and an 8-speed Steptronic automatic transmission. The Steptronic transmission offers smooth and quick shifts, with the ability to manually select gears using steering wheel-mounted paddles.
Driving Characteristics
The X6 40i xDrive Steptronic delivers a refined and capable driving experience. The 3.0-liter inline-six provides ample power for confident acceleration and effortless highway cruising. The 0-60 mph sprint takes approximately 5.2 seconds. While not as overtly sporty as the M50i, the 40i offers a pleasing balance between performance and comfort. The eight-speed automatic transmission is well-tuned, providing smooth gear changes and contributing to the engine’s broad torque band. The xDrive system ensures excellent traction in various weather conditions. Compared to the base 30i models, the 40i offers a noticeable performance upgrade, while remaining more fuel-efficient than the range-topping M50i.
Equipment & Trim Levels
The X6 40i typically came well-equipped as standard. Interior features included leather upholstery, power-adjustable front seats with memory function, a panoramic sunroof, and a premium sound system. Standard technology included BMW’s iDrive infotainment system with a 12.3-inch touchscreen display, navigation, Apple CarPlay, and Android Auto compatibility. Optional extras included upgraded leather options, ventilated and massaging front seats, a head-up display, and advanced driver-assistance systems such as adaptive cruise control and lane-keeping assist. Exterior options included various wheel designs, metallic paint finishes, and the M Sport package, which added more aggressive styling cues.
Chassis & Braking
The G06 X6 features a robust chassis with a double-wishbone front suspension and an independent multi-link rear suspension. This setup provides a comfortable ride while maintaining good handling characteristics. The 40i model typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The electronic stability control (ESC) system and ABS (Anti-lock Braking System) are standard features, enhancing safety and control. The suspension tuning is geared towards a balance of comfort and handling, making it suitable for both daily driving and spirited driving on winding roads.
Market Reception & Comparison
The X6 40i was generally well-received by automotive critics. It was praised for its powerful engine, comfortable ride, and luxurious interior. Critics noted that it offered a compelling alternative to traditional SUVs, with its coupe-like styling and sporty driving dynamics. Compared to the X6 30i, the 40i provided a significant performance boost, justifying the higher price tag for buyers prioritizing acceleration and overall driving enjoyment. Against the X6 M50i, the 40i offered a more fuel-efficient and slightly more affordable option, albeit with less outright performance. Fuel economy figures averaged around 29.4 mpg combined, making it reasonably efficient for a vehicle of its size and performance.
Legacy
The B58 engine powering the X6 40i has proven to be a reliable and durable powerplant. While some early B58 engines experienced issues with oil consumption, these were largely addressed with updated engine management software. The 8-speed Steptronic transmission is also known for its reliability. On the used car market, the X6 40i represents a good value proposition, offering a blend of luxury, performance, and technology at a competitive price point. Regular maintenance, including oil changes and fluid checks, is crucial to ensure the long-term reliability of this vehicle. The G06 X6 40i continues to be a popular choice for buyers seeking a distinctive and capable luxury SUV.
