The BMW X4 (G02) 25d xDrive Steptronic, produced from 2018 to 2019, represents a compelling entry point into the luxury compact Sports Activity Coupe (SAC) segment. Positioned as a mid-range offering within the G02 X4 lineup, it blended diesel efficiency with BMW’s signature driving dynamics. This variant aimed to appeal to buyers seeking a balance between performance, fuel economy, and practicality, offering a more accessible price point than the higher-performance gasoline options like the X4 M40i. The 25d utilized BMW’s modular UKL platform, shared with other models like the X3, offering a versatile foundation for a range of powertrains and configurations.
Technical Specifications
| Brand | BMW |
| Model | X4 |
| Generation | X4 (G02) |
| Type (Engine) | 25d (231 Hp) xDrive Steptronic |
| Start of production | 2018 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SAC |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.2-6.3 l/100 km (37.9 – 37.3 US mpg, 45.6 – 44.8 UK mpg, 16.1 – 15.9 km/l) |
| Fuel consumption (extra urban) | 5.1-5.3 l/100 km (46.1 – 44.4 US mpg, 55.4 – 53.3 UK mpg, 19.6 – 18.9 km/l) |
| Fuel consumption (combined) | 5.5-5.7 l/100 km (42.8 – 41.3 US mpg, 51.4 – 49.6 UK mpg, 18.2 – 17.5 km/l) |
| CO2 emissions | 145-149 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.8 sec |
| Acceleration 0 – 62 mph | 6.8 sec |
| Acceleration 0 – 60 mph | 6.5 sec |
| Maximum speed | 230 km/h (142.92 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.6 kg/Hp, 131.6 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 284.9 Nm/tonne |
| Power | 231 Hp @ 4400 rpm |
| Torque | 500 Nm @ 2000 rpm (368.78 lb.-ft. @ 2000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B47D20B |
| Engine displacement | 1995 cm3 (121.74 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 5 l (5.28 US qt | 4.4 UK qt) |
| Coolant | 9.4 l (9.93 US qt | 8.27 UK qt) |
| Kerb Weight | 1755 kg (3869.11 lbs.) |
| Max. weight | 2420 kg (5335.19 lbs.) |
| Max load | 665 kg (1466.07 lbs.) |
| Trunk (boot) space – minimum | 525 l (18.54 cu. ft.) |
| Trunk (boot) space – maximum | 1430 l (50.5 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 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 | 1918 mm (75.51 in.) |
| Width including mirrors | 2138 mm (84.17 in.) |
| Height | 1621 mm (63.82 in.) |
| Wheelbase | 2864 mm (112.76 in.) |
| Front track | 1620 mm (63.78 in.) |
| Rear (Back) track | 1666 mm (65.59 in.) |
| Front overhang | 861 mm (33.9 in.) |
| Rear overhang | 1027 mm (40.43 in.) |
| Ride height (ground clearance) | 204 mm (8.03 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle (turning diameter) | 12.1 m (39.7 ft.) |
| 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 |
| Power steering | Electric Steering |
| Tires size | 225/60 R18 |
| Wheel rims size | 7J x 18 |
Powertrain & Engine Architecture
The heart of the X4 25d is BMW’s B47D20B, a 2.0-liter inline-four cylinder diesel engine. This engine is a member of BMW’s modular engine family, known for its efficiency and refinement. The B47 utilizes a second-generation common rail direct injection system, delivering fuel at pressures up to 2,000 bar for optimized combustion. A twin-scroll turbocharger with variable geometry turbine (VGT) technology provides a broad torque curve and minimizes turbo lag. The engine also features an intercooler to further enhance performance. The engine produces 231 horsepower at 4,400 rpm and a substantial 368 lb-ft of torque from as low as 2,000 rpm. This torque output is a key characteristic of the engine, providing strong acceleration in everyday driving situations. Paired with the engine is BMW’s 8-speed Steptronic automatic transmission. This transmission is known for its smooth shifts and intelligent programming, adapting to driving style and conditions. The xDrive all-wheel-drive system distributes power between the front and rear axles as needed, enhancing traction and stability.
Driving Characteristics
The X4 25d xDrive Steptronic delivers a comfortable and capable driving experience. While not as overtly sporty as the gasoline-powered variants, the 25d offers ample power for confident overtaking and highway cruising. The 8-speed automatic transmission contributes to a relaxed driving experience, with smooth gear changes and a willingness to downshift when needed. The xDrive all-wheel-drive system provides excellent grip in various weather conditions. Compared to the manual transmission versions of the 25d, the Steptronic automatic prioritizes convenience and ease of use. The automatic transmission’s programming is geared towards efficiency, resulting in slightly slower acceleration times than the manual. However, the difference is often negligible in real-world driving. The gear ratios are optimized for both fuel economy and performance, providing a good balance between the two.
Equipment & Trim Levels
The X4 25d typically came well-equipped as standard. Common features included BMW’s iDrive infotainment system with a central display screen, automatic climate control, power-adjustable front seats, and a leather-wrapped steering wheel. Standard safety features included ABS, stability control, and multiple airbags. Optional extras included features like a panoramic sunroof, upgraded leather upholstery, a premium sound system, and advanced driver-assistance systems such as adaptive cruise control and lane departure warning. Trim levels varied depending on the market, but generally offered packages that bundled together popular options.
Chassis & Braking
The X4 25d utilizes a double-wishbone front suspension and an independent multi-link rear suspension. This suspension setup provides a comfortable ride while maintaining good handling characteristics. The suspension is tuned to balance comfort and control, offering a composed ride even on uneven surfaces. The X4 25d is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The braking system is assisted by ABS and electronic brakeforce distribution. The weight distribution of the vehicle, combined with the all-wheel-drive system, contributes to stable and predictable braking performance.
Market Reception & Comparison
The X4 25d was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined engine. However, some critics noted that it lacked the outright performance of the higher-powered gasoline variants. Compared to the X4 xDrive30i (gasoline), the 25d offered significantly better fuel economy but less horsepower and acceleration. The 25d also provided a more affordable entry point into the X4 range. Against competitors like the Audi Q5 and Mercedes-Benz GLC, the X4 25d offered a compelling combination of performance, luxury, and practicality.
Legacy
The B47 engine, found in the X4 25d, has proven to be a relatively reliable powertrain. While some early versions of the B47 experienced issues with timing chain wear, these problems were largely addressed in later iterations. The 8-speed Steptronic automatic transmission is also known for its durability. Today, used X4 25d models represent a good value for buyers seeking a luxurious and efficient compact SUV. Regular maintenance, including oil changes and adherence to BMW’s recommended service intervals, is crucial for ensuring the long-term reliability of this vehicle. The X4 25d remains a popular choice in the used car market, offering a blend of practicality, performance, and BMW’s renowned driving experience.
