The BMW X6 (G06) 40i sDrive Steptronic, produced from August 2019 through 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 rear-wheel-drive variant aimed to deliver a balance of performance, luxury, and efficiency, appealing to buyers seeking a sporty SUV experience without the added cost and complexity of all-wheel drive or the top-tier engine. The G06 generation marked the third iteration of the X6, building upon the original’s controversial yet successful blend of coupe-like styling and SUV practicality.
Technical Specifications
| Brand | BMW |
| Model | X6 |
| Generation | X6 (G06) |
| Type (Engine) | 40i (335 Hp) sDrive Steptronic |
| Start of production | August, 2019 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SAC |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban (EPA) | 11.2 l/100 km (21 US mpg, 25.2 UK mpg, 8.9 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 9 l/100 km (26.1 US mpg, 31.4 UK mpg, 11.1 km/l) |
| Fuel consumption (economy) – combined (EPA) | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 5.2 sec |
| Maximum speed | 210 km/h (130.49 mph), Electronically limited |
| Weight-to-power ratio | 6.3 kg/Hp, 157.6 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 210.3 Nm/tonne |
| Power | 335 Hp @ 5500-6500 rpm |
| Power per litre | 111.7 Hp/l |
| Torque | 447 Nm @ 1500-5200 rpm (329.69 lb.-ft. @ 1500-5200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30M1 |
| 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, Double-VANOS |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 2126 kg (4687.03 lbs.) |
| Max. weight | 2750 kg (6062.71 lbs.) |
| Max load | 624 kg (1375.68 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%) | 3270 kg (7209.12 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4947 mm (194.76 in.) |
| Width | 2004 mm (78.9 in.) |
| Width including mirrors | 2212 mm (87.09 in.) |
| Height | 1684 mm (66.3 in.) |
| Wheelbase | 2975 mm (117.13 in.) |
| Front track | 1679 mm (66.1 in.) |
| Rear (Back) track | 1689 mm (66.5 in.) |
| Front overhang | 890 mm (35.04 in.) |
| Rear overhang | 1082 mm (42.6 in.) |
| Ride height (ground clearance) | 206 mm (8.11 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle (turning diameter) | 12.6 m (41.34 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer, Air Suspension – Optional |
| Rear suspension | Independent multi-link spring suspension with stabilizer, Air Suspension – Optional |
| 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 | Front wheel tires: 275/45 R20; 275/40 R21; 275/35 R22Rear wheel tires: 275/45 R20; 315/35 R21; 315/30 R22 |
| Wheel rims size | Front wheel rims: 9J x 20; 9.5J x 21; 9.5J x 22Rear wheel rims: 9J x 20; 10J x 21; 10.5J x 22 |
Powertrain & Engine Architecture
At the heart of the X6 40i lies the B58B30M1 3.0-liter inline-six engine. This engine is a cornerstone of BMW’s modern powertrain strategy, known for its smooth power delivery and efficiency. The B58 utilizes direct fuel injection, a twin-scroll turbocharger, and BMW’s VALVETRONIC variable valve timing and Double-VANOS variable camshaft timing systems. These technologies work in concert to optimize combustion, reduce emissions, and enhance both low-end torque and high-rpm horsepower. The engine produces 335 hp at 5500-6500 rpm and 447 Nm (329.69 lb-ft) of torque between 1500 and 5200 rpm. The engine is longitudinally mounted, powering the rear wheels. The Steptronic 8-speed automatic transmission is standard, offering smooth and responsive shifts. This transmission is programmed for both comfort and performance, with the ability to manually shift using steering wheel-mounted paddles.
Driving Characteristics
The rear-wheel-drive configuration of the X6 40i sDrive Steptronic imparts a distinct driving feel compared to its xDrive all-wheel-drive siblings. While lacking the added traction of AWD, the 40i offers a more engaging and balanced driving experience, particularly on dry pavement. The 8-speed automatic transmission is well-tuned, providing quick and seamless gear changes. Acceleration from 0 to 60 mph takes approximately 5.2 seconds. The engine’s broad torque curve ensures strong acceleration in everyday driving situations. Compared to the X6 M50i, the 40i offers a less aggressive, more refined driving experience. The gear ratios are optimized for a blend of fuel efficiency and performance, with taller gearing in higher gears for relaxed highway cruising.
Equipment & Trim Levels
The X6 40i sDrive Steptronic came standard with a comprehensive suite of features, including BMW’s iDrive infotainment system with a 12.3-inch touchscreen display, navigation, Apple CarPlay compatibility, a premium sound system, leather upholstery, power-adjustable front seats, and a panoramic sunroof. Optional extras included upgraded leather options, a head-up display, gesture control, active steering, and various driver-assistance systems such as adaptive cruise control and lane-keeping assist. Interior trim options ranged from fine wood veneers to aluminum accents, allowing buyers to personalize the cabin to their preferences.
Chassis & Braking
The X6 40i features a robust chassis designed to handle the vehicle’s weight and power. The front suspension utilizes a double-wishbone setup with coil springs and a transverse stabilizer bar, while the rear suspension employs an independent multi-link design with a stabilizer bar. Air suspension was available as an option, providing adjustable ride height and improved comfort. Braking duties are handled by ventilated discs on all four wheels, coupled with BMW’s Anti-lock Braking System (ABS) and electronic stability control. The steering system is a rack-and-pinion setup with electric power assistance.
Market Reception & Comparison
The X6 40i sDrive Steptronic was generally well-received by automotive critics. It was praised for its powerful engine, comfortable ride, and luxurious interior. However, some reviewers noted that the rear-wheel-drive configuration might not be ideal for all climates or driving conditions. Compared to the X6 30i, the 40i offered a significant performance upgrade. Fuel economy was rated at around 23.1 US mpg combined, which was competitive for a vehicle of its size and performance. Reliability reports have been generally positive, with the B58 engine proving to be a durable and dependable unit.
Legacy
The BMW X6 (G06) 40i sDrive Steptronic represents a compelling option in the luxury mid-size SUV segment. The B58 engine has earned a reputation for longevity and relatively low maintenance costs. On the used car market, these models hold their value reasonably well, particularly those with low mileage and a well-maintained service history. The combination of performance, luxury, and practicality continues to appeal to buyers seeking a distinctive and capable SUV.
