The BMW X5 (G05) 40i, produced from 2020 to February 2023, represents a significant iteration of BMW’s popular Sports Activity Vehicle (SAV). This variant, equipped with a 3.0-liter inline-six engine and a 48-volt mild hybrid system paired with an eight-speed Steptronic automatic transmission, occupies a central position within the G05 X5 lineup, offering a balance between performance, efficiency, and luxury. It serves as a step up from the base 40i models and provides a more accessible entry point into the X5 range compared to the higher-performance M50i or the plug-in hybrid xDrive45e.
Technical Specifications
| Brand | BMW |
| Model | X5 |
| Generation | X5 (G05) |
| Type (Engine) | 40i (333 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | 2020 |
| End of production | February, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SAV |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 8.9-10.7 l/100 km (26.4 – 22 US mpg, 31.7 – 26.4 UK mpg, 11.2 – 9.3 km/l) |
| CO2 emissions (WLTP) | 204-244 g/km |
| Fuel consumption (economy) – urban (NEDC) | 9.5-10.1 l/100 km (24.8 – 23.3 US mpg, 29.7 – 28 UK mpg, 10.5 – 9.9 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 6.7-7.4 l/100 km (35.1 – 31.8 US mpg, 42.2 – 38.2 UK mpg, 14.9 – 13.5 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 7.7-8.4 l/100 km (30.5 – 28 US mpg, 36.7 – 33.6 UK mpg, 13 – 11.9 km/l) |
| CO2 emissions (NEDC) | 176-192 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.7 sec |
| Acceleration 0 – 62 mph | 5.7 sec |
| Acceleration 0 – 60 mph | 5.4 sec |
| Maximum speed | 243 km/h (150.99 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 6.3 kg/Hp, 158.6 Hp/tonne |
| Weight-to-torque ratio | 4.7 kg/Nm, 214.3 Nm/tonne |
| Electric motor power | 11 Hp |
| Electric motor location | Front, Longitudinal |
| Power | 333 Hp @ 5500-6250 rpm |
| Torque | 450 Nm @ 1600-4800 rpm (331.9 lb.-ft. @ 1600-4800 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, Double-VANOS |
| 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 | 2100 kg (4629.71 lbs.) |
| Max. weight | 2840 kg (6261.13 lbs.) |
| Max load | 740 kg (1631.42 lbs.) |
| Trunk (boot) space – minimum | 650 l (22.95 cu. ft.) |
| Trunk (boot) space – maximum | 1870 l (66.04 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 | 4922 mm (193.78 in.) |
| Width | 2004 mm (78.9 in.) |
| Width including mirrors | 2218 mm (87.32 in.) |
| Height | 1745 mm (68.7 in.) |
| Wheelbase | 2975 mm (117.13 in.) |
| Front track | 1666 mm (65.59 in.) |
| Rear (Back) track | 1685 mm (66.34 in.) |
| Front overhang | 874 mm (34.41 in.) |
| Rear overhang | 1073 mm (42.24 in.) |
| Ride height (ground clearance) | 214 mm (8.43 in.) |
| Drag coefficient (Cd) | 0.32 |
| Minimum turning circle (turning diameter) | 12.6 m (41.34 ft.) |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
INTRODUCTION
The BMW X5 G05 40i, launched in 2020, is a key model within the fourth generation of the X5 series. Built on the Cluster Architecture (CLAR) platform, it represents a move towards lighter construction and increased efficiency. The 40i variant specifically targets buyers seeking a premium SUV experience with a potent yet relatively economical powertrain. The integration of a 48V mild hybrid system enhances both fuel economy and responsiveness, making it a compelling option in the luxury mid-size SUV segment. This model year marked a significant refresh for the X5, incorporating updated technology and styling cues.
Powertrain & Engine Architecture
At the heart of the X5 40i lies the B58B30C 3.0-liter inline-six engine. This engine is renowned for its smooth power delivery and refined character. It 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 efficiency and reduce emissions. The mild hybrid system, consisting of a 48V starter-generator, provides an additional 11 horsepower and allows for features like extended coasting and smoother start-stop operation. The eight-speed Steptronic automatic transmission is a crucial component, offering quick and precise shifts. It’s programmed for both comfort and performance, adapting to the driver’s style. The transmission features a wider gear spread than previous generations, contributing to improved fuel economy and acceleration.
Driving Characteristics
The X5 40i delivers a refined and capable driving experience. The 333 horsepower and 450 Nm (331.9 lb-ft) of torque provide ample power for everyday driving and confident overtaking. Acceleration from 0 to 60 mph takes approximately 5.4 seconds. While not as overtly sporty as the M50i, the 40i offers a pleasing balance between performance and comfort. The automatic transmission is well-tuned, providing smooth gear changes and responsive kickdowns. The mild hybrid system contributes to a more seamless driving experience, particularly in urban environments. Compared to earlier X5 generations, the G05 40i feels more agile and connected to the road, thanks to the CLAR platform and improved suspension tuning.
Equipment & Trim Levels
The X5 40i comes standard with a generous array of features, including BMW’s iDrive infotainment system with a 12.3-inch touchscreen display, leather upholstery, power-adjustable front seats, and a panoramic sunroof. Standard safety features include automatic emergency braking, lane departure warning, and blind-spot monitoring. Optional extras include premium sound systems, adaptive cruise control, massaging seats, and a variety of interior trim options. The interior design is modern and luxurious, with high-quality materials and a focus on ergonomics. The dashboard layout is clean and intuitive, with a focus on the central touchscreen display.
Chassis & Braking
The X5 40i features a double-wishbone front suspension and an independent multi-link rear suspension. This setup provides a comfortable ride and precise handling. The suspension is tuned to balance comfort and control, offering a composed ride even on uneven surfaces. Ventilated disc brakes are standard on all four wheels, providing ample stopping power. The X5 40i also incorporates BMW’s Dynamic Stability Control (DSC) system, which helps to maintain stability in challenging driving conditions. The standard wheel and tire sizes vary depending on the specific trim level, ranging from 18-inch to 21-inch wheels.
Market Reception & Comparison
The X5 40i was generally well-received by automotive critics, who praised its refined powertrain, comfortable ride, and luxurious interior. It was often compared to rivals such as the Audi Q7, Mercedes-Benz GLE, and Acura MDX. The X5 40i typically offered a more engaging driving experience than the Acura, while the Audi and Mercedes-Benz provided comparable levels of luxury and technology. Fuel economy was considered competitive for its class, with the mild hybrid system contributing to improved efficiency. Reliability reports have been generally positive, although some owners have reported minor issues with the infotainment system.
Legacy
The BMW X5 G05 40i represents a significant step forward in the evolution of the X5. Its combination of a potent inline-six engine, mild hybrid technology, and luxurious interior has made it a popular choice among luxury SUV buyers. The B58 engine is known for its durability and reliability, and the eight-speed Steptronic transmission has proven to be a robust and efficient unit. On the used car market, well-maintained examples of the G05 40i hold their value well, reflecting the X5’s reputation for quality and refinement. As BMW continues to innovate in the SUV segment, the G05 40i will likely be remembered as a pivotal model that bridged the gap between traditional luxury and modern efficiency.
