The BMW X4 (G02) 30d xDrive Steptronic, produced from 2018 to August 2020, represents a compelling blend of sport activity coupe (SAC) styling and efficient diesel performance within the second generation of the X4 series. Positioned as a mid-range offering in the G02 lineup, it catered to buyers seeking a balance between performance, fuel economy, and the X4’s distinctive coupe-like silhouette. This variant utilized BMW’s sophisticated xDrive all-wheel-drive system and an 8-speed Steptronic automatic transmission, making it a popular choice in European and global markets where diesel engines remained prevalent.
Technical Specifications
| Brand | BMW |
| Model | X4 |
| Generation | X4 (G02) |
| Type (Engine) | 30d (265 Hp) xDrive Steptronic |
| Start of production | 2018 |
| End of production | August, 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SAC |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.7-6.9 l/100 km (35.1 – 34.1 US mpg, 42.2 – 40.9 UK mpg, 14.9 – 14.5 km/l) |
| Fuel consumption (extra urban) | 5.4-5.5 l/100 km (43.6 – 42.8 US mpg, 52.3 – 51.4 UK mpg, 18.5 – 18.2 km/l) |
| Fuel consumption (combined) | 5.8-6.0 l/100 km (40.6 – 39.2 US mpg, 48.7 – 47.1 UK mpg, 17.2 – 16.7 km/l) |
| CO2 emissions | 153-158 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.8 sec |
| Acceleration 0 – 62 mph | 5.8 sec |
| Acceleration 0 – 60 mph | 5.5 sec |
| Maximum speed | 240 km/h (149.13 mph) |
| Emission standard | Euro 6d-TEMP |
| Weight-to-power ratio | 6.9 kg/Hp, 145.6 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 340.7 Nm/tonne |
| Power | 265 Hp @ 4000 rpm |
| Torque | 620 Nm @ 2000-2500 rpm (457.29 lb.-ft. @ 2000-2500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B57D30A |
| Engine displacement | 2993 cm3 (182.64 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1820 kg (4012.41 lbs.) |
| Max. weight | 2460 kg (5423.37 lbs.) |
| Max load | 640 kg (1410.96 lbs.) |
| Trunk (boot) space – minimum | 525 l (18.54 cu. ft.) |
| Trunk (boot) space – maximum | 1430 l (50.5 cu. ft.) |
| Fuel tank capacity | 68 l (17.96 US gal | 14.96 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.) |
| 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.) |
| 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 30d is BMW’s B57D30A 3.0-liter inline-six diesel engine. This engine is a member of the modular B-series engine family, known for its robust construction and advanced technology. The B57 features a cast iron block, aluminum cylinder head, and four valves per cylinder. It employs a sophisticated common-rail direct injection system operating at extremely high pressures (typically around 2,500 bar) for optimized fuel atomization and combustion efficiency. The engine is equipped with a twin-scroll turbocharger with variable geometry turbine (VGT) technology, along with an intercooler, to deliver strong torque across a wide rev range. The 8-speed Steptronic automatic transmission is a torque-converter type, offering smooth and quick shifts. It features adaptive shift programs that adjust to the driver’s style and road conditions. xDrive, BMW’s intelligent all-wheel-drive system, utilizes a multi-plate clutch to distribute torque between the front and rear axles, enhancing traction and stability.
Driving Characteristics
The X4 30d xDrive Steptronic delivers a refined and capable driving experience. The 265 horsepower and 620 Nm (457 lb-ft) of torque provide ample power for confident acceleration and effortless highway cruising. The 0-60 mph sprint takes approximately 5.5 seconds. The automatic transmission is well-tuned, providing smooth gear changes and responsive performance. While not as overtly sporty as some of its gasoline-powered siblings, the 30d offers a strong surge of mid-range torque, making it particularly well-suited for overtaking maneuvers. The xDrive system provides excellent grip in all weather conditions, inspiring confidence on slippery surfaces. Compared to the higher-output X4 M40i, the 30d prioritizes fuel efficiency and relaxed cruising over outright performance. Compared to manual transmission versions (available in some markets), the Steptronic automatic offers greater convenience, especially in urban traffic.
Equipment & Trim Levels
The X4 30d xDrive Steptronic typically came well-equipped as standard. Common features included BMW’s iDrive infotainment system with a central display screen, navigation, automatic climate control, leather upholstery, power-adjustable front seats, and a suite of driver-assistance systems such as lane departure warning and collision warning. Optional extras included a panoramic sunroof, upgraded audio systems (Harman Kardon), adaptive cruise control, head-up display, and various interior trim options. Trim levels varied by market, but generally offered packages that bundled popular options together. The interior design emphasized a driver-focused layout with high-quality materials and a modern aesthetic.
Chassis & Braking
The G02 X4 features a robust chassis designed to balance comfort and handling. The front suspension utilizes a double-wishbone setup, while the rear employs an independent multi-link suspension. This configuration provides a good level of ride comfort while maintaining precise control. The X4 30d typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard features. The suspension tuning was generally geared towards a slightly firmer ride compared to the X3, reflecting the X4’s sportier character.
Market Reception & Comparison
The X4 30d xDrive Steptronic was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and practical interior. The fuel economy was a significant selling point, particularly in Europe where diesel fuel was more common and often less expensive than gasoline. Compared to the X4 20d, the 30d offered a noticeable performance upgrade. Compared to the X4 M40i, it provided a more balanced combination of performance and efficiency. Some critics noted that the X4’s sloping roofline slightly compromised rear headroom compared to the more conventionally shaped X3.
Legacy
The B57 engine family, including the B57D30A found in the X4 30d, has proven to be remarkably reliable. With proper maintenance, these engines can accumulate high mileage without major issues. The 8-speed Steptronic transmission is also known for its durability. On the used car market, the X4 30d xDrive Steptronic represents a good value proposition for buyers seeking a stylish and efficient luxury SUV. However, potential buyers should be aware of the potential for diesel particulate filter (DPF) issues, particularly if the vehicle has been primarily used for short trips. Regular servicing and the use of high-quality diesel fuel are essential for maintaining the long-term health of this powertrain.
