Technical Specifications
| Brand | BMW |
| Model | X3 |
| Generation | X3 (G01 LCI, facelift 2021) |
| Type (Engine) | 18d (150 Hp) Mild Hybrid sDrive Steptronic |
| Start of production | 2021 |
| End of production | 2024 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SAV (Sports Activity Vehicle) |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 5.6-6.6 l/100 km (42 – 35.6 US mpg) |
| CO2 emissions (WLTP) | 147-172 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.4 sec |
| Acceleration 0 – 62 mph | 9.4 sec |
| Acceleration 0 – 60 mph | 8.9 sec |
| Maximum speed | 198 km/h (123.03 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 12.1 kg/Hp |
| Weight-to-torque ratio | 5.2 kg/Nm |
| Gross battery capacity | 0.4 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Electric motor power | 11 Hp |
| Electric motor Torque | 25 Nm (18.44 lb.-ft.) |
| Power | 150 Hp @ 4000 rpm |
| Torque | 350 Nm @ 1750-2500 rpm (258.15 lb.-ft. @ 1750-2500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B47 |
| 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.) |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Twin-power turbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Kerb Weight | 1810 kg (3990.37 lbs.) |
| Max. weight | 2410 kg (5313.14 lbs.) |
| Max load | 600 kg (1322.77 lbs.) |
| Trunk (boot) space – minimum | 550 l (19.42 cu. ft.) |
| Trunk (boot) space – maximum | 1600 l (56.5 cu. ft.) |
| Fuel tank capacity | 68 l (17.96 US gal | 14.96 UK gal) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4708 mm (185.35 in.) |
| Width | 1891 mm (74.45 in.) |
| Width including mirrors | 2138 mm (84.17 in.) |
| Height | 1676 mm (65.98 in.) |
| Wheelbase | 2864 mm (112.76 in.) |
| Front track | 1620 mm (63.78 in.) |
| Rear track | 1636 mm (64.41 in.) |
| Front suspension | Spring Strut, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Number of gears | 8 |
| Gearbox type | Automatic transmission Steptronic |
The BMW X3 (G01 LCI) 18d, introduced with the 2021 facelift, represents BMW’s entry-level diesel offering in the popular compact luxury SUV segment. Produced from 2021 through 2024, this model combined a 2.0-liter turbocharged diesel engine with a 48-volt mild hybrid system and a rear-wheel-drive (sDrive) configuration paired with an 8-speed Steptronic automatic transmission. It was designed to balance fuel efficiency with a premium driving experience, appealing to buyers prioritizing economy and refinement over outright performance. The G01 LCI builds upon the success of the G01 generation X3, offering updated styling, enhanced technology, and improved efficiency.
Powertrain & Engine Architecture
The heart of the X3 18d is the BMW B47D20 2.0-liter inline-four cylinder diesel engine. This engine utilizes a common-rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. A twin-scroll turbocharger with intercooling enhances power output and responsiveness. The B47 engine is known for its robust construction and relatively simple design, contributing to its reliability. The 48V mild hybrid system adds a small electric motor integrated into the drivetrain. This system provides a power boost during acceleration, allows for extended coasting with the engine off (sailing), and contributes to improved fuel economy. The 8-speed Steptronic automatic transmission is a torque-converter type, offering smooth and efficient gear changes. It features adaptive shift programs that adjust to the driver’s style and road conditions.
Driving Characteristics
The X3 18d, with its 150 horsepower and 350 Nm (258 lb-ft) of torque, delivers adequate performance for everyday driving. Acceleration from 0-60 mph takes around 8.9 seconds, which is competitive within its class but noticeably slower than higher-powered X3 variants like the xDrive30i. The mild hybrid system helps to mitigate some of the turbo lag often associated with diesel engines, providing a more immediate response. The Steptronic transmission is well-tuned, offering seamless shifts and contributing to a comfortable driving experience. While not a sports car, the X3 18d provides a composed and refined ride, typical of BMW’s engineering philosophy. The rear-wheel-drive configuration (sDrive) offers a slightly more engaging driving experience compared to the all-wheel-drive (xDrive) models, though it may be less capable in adverse weather conditions.
Equipment & Trim Levels
The X3 18d typically came equipped with a generous amount of standard features, including BMW’s iDrive infotainment system with a touchscreen display, automatic climate control, power-adjustable front seats, and a suite of safety features like automatic emergency braking and lane departure warning. Interior upholstery was typically a combination of cloth and synthetic leather, with optional upgrades to genuine leather available. Common optional extras included a panoramic sunroof, premium sound system, navigation system, and adaptive cruise control. Trim levels varied by market, but generally, the 18d sat as the entry-level diesel offering, positioned below the more powerful 20d and 30d models.
Chassis & Braking
The X3 18d utilizes a MacPherson strut front suspension and a multi-link rear suspension, providing a comfortable and controlled ride. Stabilizer bars are fitted to both axles to reduce body roll during cornering. The braking system consists of ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard features, enhancing safety and stability. The suspension tuning is geared towards comfort and refinement, rather than outright sportiness.
Market Reception & Comparison
The X3 18d was generally well-received by automotive critics as a practical and efficient option within the luxury compact SUV segment. Its fuel economy was a key selling point, particularly in Europe where diesel engines are more prevalent. Compared to the higher-output X3 variants, the 18d offered a more affordable entry point into the X3 range, but at the expense of performance. The 20d and 30d models provided significantly more power and acceleration, appealing to drivers prioritizing performance. However, the 18d’s lower running costs and adequate performance made it a popular choice for those seeking a balanced package.
Legacy
The B47 engine, used in the X3 18d, has proven to be a relatively reliable powertrain, although some early models experienced issues with the timing chain. With proper maintenance, these engines can provide many years of service. On the used car market, the X3 18d represents a good value proposition, offering a premium SUV experience at a more affordable price point. Its fuel efficiency and comfortable ride continue to make it an attractive option for buyers seeking a practical and refined compact SUV.
