The BMW X4 M40i (G02), produced from November 2019 to 2021, represents a performance-oriented variant within the second generation of the X4 Sports Activity Coupe (SAC). Positioned as a mid-range to premium offering, it bridged the gap between the base X4 models and the full-fledged X4 M. This model aimed to deliver a compelling blend of sporty handling, luxurious appointments, and robust power, appealing to buyers seeking a dynamic and versatile SUV. The G02 generation X4, built on the CLAR platform, introduced increased dimensions and a more refined interior compared to its predecessor.
Technical Specifications
| Brand | BMW |
| Model | X4 |
| Generation | X4 (G02) |
| Type (Engine) | M40i (360 Hp) xDrive Steptronic |
| Start of production | November, 2019 |
| End of production | 2021 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SAC |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 9.8-10 l/100 km (24 – 23.5 US mpg) |
| Fuel consumption (extra urban) | 6.6-7.0 l/100 km (35.6 – 33.6 US mpg) |
| Fuel consumption (combined) | 7.8-8.1 l/100 km (30.2 – 29 US mpg) |
| CO2 emissions | 177-185 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.8 sec |
| Acceleration 0 – 62 mph | 4.8 sec |
| Acceleration 0 – 60 mph | 4.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d-TEMP |
| Weight-to-power ratio | 5.2 kg/Hp, 193 Hp/tonne |
| Weight-to-torque ratio | 3.7 kg/Nm, 268.1 Nm/tonne |
| Power | 360 Hp @ 5200-6500 rpm |
| Power per litre | 120.1 Hp/l |
| Torque | 500 Nm @ 1850-5000 rpm (368.78 lb.-ft. @ 1850-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30B |
| 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 | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 13.5 l (14.27 US qt | 11.88 UK qt) |
| Kerb Weight | 1865 kg (4111.62 lbs.) |
| Max. weight | 2430 kg (5357.23 lbs.) |
| Max load | 565 kg (1245.61 lbs.) |
| Trunk (boot) space – minimum | 525 l (18.54 cu. ft.) |
| Trunk (boot) space – maximum | 1430 l (50.5 cu. ft.) |
| Fuel tank capacity | 65 l (17.17 US gal | 14.3 UK gal) |
| Permitted trailer load with brakes (8%) | 2400 kg (5291.09 lbs.) |
| Permitted trailer load with brakes (12%) | 2400 kg (5291.09 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 4752 mm (187.09 in.) |
| Width | 1938 mm (76.3 in.) |
| Width including mirrors | 2138 mm (84.17 in.) |
| Height | 1621 mm (63.82 in.) |
| Wheelbase | 2864 mm (112.76 in.) |
| Minimum turning circle | 12.1 m (39.7 ft.) |
| Drivetrain Architecture | All wheel drive (4×4) |
| Number of gears | 8 |
| Type of gearbox | automatic transmission Steptronic |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Front tires | 245/45 R20 103W XL |
| Rear tires | 275/40 R20 106W XL |
| Front wheel rims | 8J x 20 |
| Rear wheel rims | 9.5J x 20 |
Powertrain & Engine Architecture
The heart of the X4 M40i is BMW’s B58B30B 3.0-liter inline-six engine. This engine is a member of the modular B-series engine family, known for its robust construction and high output. It utilizes direct fuel injection, a twin-scroll turbocharger, and Double-VANOS variable valve timing for both intake and exhaust. The B58 engine is renowned for its smooth power delivery and responsiveness. The engine produces 360 horsepower at 5200-6500 rpm and 500 Nm (368 lb-ft) of torque between 1850 and 5000 rpm. This power is channeled through an eight-speed Steptronic automatic transmission, which features optimized shift programming for both performance and efficiency. The xDrive all-wheel-drive system intelligently distributes power between the front and rear axles, enhancing traction and stability in various driving conditions.
Driving Characteristics
The X4 M40i delivers a noticeably more engaging driving experience than the lower-trim X4 models. The potent engine and responsive transmission provide brisk acceleration, with 0-60 mph times consistently around 4.6 seconds. The eight-speed automatic transmission offers smooth and quick shifts, and the xDrive system provides excellent grip, particularly in inclement weather. While not as track-focused as the full M variant, the M40i offers a well-balanced chassis and precise steering, making it enjoyable to drive on winding roads. Compared to the X4 30i, the M40i offers a significant performance upgrade, while remaining more approachable and comfortable than the X4 M.
Equipment & Trim Levels
The X4 M40i came standard with a generous array of features, including BMW’s iDrive infotainment system with a 12.3-inch touchscreen display, navigation, Apple CarPlay compatibility, a premium sound system, and a panoramic sunroof. Interior appointments typically included leather upholstery, power-adjustable front seats with memory function, and ambient lighting. Optional extras included adaptive cruise control, a head-up display, ventilated front seats, and a variety of cosmetic enhancements. The M40i also featured unique exterior styling cues, such as a more aggressive front fascia, larger air intakes, and M-specific exhaust outlets.
Chassis & Braking
The X4 M40i benefits from a sophisticated chassis design. It features a multi-link rear suspension and a double-joint strut front axle, optimized for both comfort and handling. The suspension is tuned to provide a sporty yet compliant ride. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The M40i also incorporates BMW’s Dynamic Stability Control (DSC) system, which helps to maintain stability during cornering and emergency maneuvers. The standard wheel and tire sizes are 245/45 R20 front and 275/40 R20 rear, contributing to the vehicle’s grip and handling characteristics.
Market Reception & Comparison
The X4 M40i was generally well-received by automotive critics, who praised its powerful engine, engaging driving dynamics, and luxurious interior. It was often positioned as a sweet spot in the X4 lineup, offering a compelling balance of performance and practicality. Fuel economy was considered reasonable for a vehicle of its class, with combined figures ranging from 7.8 to 8.1 l/100 km (30.2 – 29 US mpg). Compared to the X4 30i, the M40i offered a substantial performance boost, but at a higher price point. Reliability reports have been generally positive, with the B58 engine proving to be a durable and dependable unit.
Legacy
The BMW X4 M40i (G02) has established itself as a desirable used vehicle, particularly among enthusiasts seeking a sporty and refined SUV. The B58 engine’s reputation for reliability and performance has contributed to its continued popularity. While maintenance costs can be higher than those of more mainstream SUVs, the X4 M40i offers a unique combination of driving pleasure and practicality that continues to appeal to a wide range of buyers. The G02 generation X4, and specifically the M40i variant, represents a significant step forward in BMW’s SUV offerings, blending performance, luxury, and technology in a compelling package.
