The BMW X3 (G01) 30d, produced from 2020 to 2021, represents a significant iteration of BMW’s popular compact luxury Sports Activity Vehicle (SAV). This variant, equipped with a 3.0-liter inline-six diesel engine and an eight-speed Steptronic automatic transmission, incorporates mild hybrid technology (MHEV) to enhance both performance and fuel efficiency. Positioned as a mid-range offering within the G01 X3 lineup, the 30d aimed to balance spirited driving with reasonable running costs, appealing to buyers seeking a refined and capable SUV. It was a key model in BMW’s strategy to offer a diverse range of powertrain options, catering to varying market demands, particularly in Europe where diesel engines remained prevalent.
Technical Specifications
| Brand | BMW |
| Model | X3 |
| Generation | X3 (G01) |
| Type (Engine) | 30d (286 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | 2020 |
| End of production | 2021 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SAV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.4-6.7 l/100 km (36.8 – 35.1 US mpg) |
| Fuel consumption (extra urban) | 4.6-5.0 l/100 km (51.1 – 47 US mpg) |
| Fuel consumption (combined) | 5.2-5.6 l/100 km (45.2 – 42 US mpg) |
| CO2 emissions | 137-147 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.7 sec |
| Acceleration 0 – 62 mph | 5.7 sec |
| Acceleration 0 – 60 mph | 5.4 sec |
| Maximum speed | 245 km/h (152.24 mph) |
| Emission standard | EURO 6d |
| Weight-to-power ratio | 6.7 kg/Hp |
| Weight-to-torque ratio | 3 kg/Nm |
| Gross battery capacity | 0.528 kWh |
| Electric motor power | 11 Hp |
| Power | 286 Hp @ 4000 rpm |
| Torque | 650 Nm @ 1500-2500 rpm (479.42 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B57D30B |
| 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 capacity | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1930 kg (4254.92 lbs.) |
| Max. weight | 2550 kg (5621.79 lbs.) |
| Max load | 620 kg (1366.87 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) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load (braked) | 2400 kg (5291.09 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 4708 mm (185.35 in.) |
| Width | 1891 mm (74.45 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.) |
| Ride height (ground clearance) | 204 mm (8.03 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle | 12.0 m (39.37 ft.) |
| Drivetrain Architecture | ICE and electric motor, All wheel drive |
| Number of gears | 8 |
| Gearbox type | Automatic Steptronic |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
The heart of the X3 30d is BMW’s B57D30B 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 sophisticated technology. The B57 features a cast iron block, aluminum cylinder head, and a four-valve-per-cylinder configuration. It employs a high-pressure common rail direct injection system, delivering fuel at up to 2,500 bar for optimized combustion. The engine is turbocharged by a twin-scroll turbocharger with variable geometry turbine (VGT) technology, enhancing responsiveness and minimizing turbo lag. The mild hybrid system consists of a 48V starter-generator, which provides a power boost during acceleration and enables smoother start-stop operation. This system also allows for coasting with the engine switched off, further improving fuel economy. The eight-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 30d delivers a refined and capable driving experience. The 650 Nm (479 lb-ft) of torque available from 1500-2500 rpm provides strong acceleration in everyday driving situations. The 0-60 mph sprint takes approximately 5.4 seconds, making it a relatively quick SUV. The eight-speed transmission is well-matched to the engine, providing seamless gear changes and keeping the engine in its optimal power band. Compared to the higher-output X3 M40i, the 30d offers less outright performance, but it compensates with superior fuel economy and a more relaxed driving character. The xDrive all-wheel-drive system provides excellent traction in all weather conditions, enhancing stability and control. The steering is precise and well-weighted, offering a good connection to the road.
Equipment & Trim Levels
The X3 30d typically came well-equipped as standard. Common features included BMW’s iDrive infotainment system with a 10.25-inch touchscreen display, navigation, Apple CarPlay compatibility, automatic climate control, leather upholstery, and power-adjustable front seats. Optional extras included a panoramic sunroof, premium Harman Kardon sound system, adaptive cruise control, and a head-up display. Trim levels varied by market, but generally offered packages that added cosmetic enhancements, such as different wheel designs and interior trim options. The X3 30d aimed for a balance between luxury and practicality, offering a comfortable and well-appointed interior without the higher price tag of the performance-oriented M40i.
Chassis & Braking
The G01 X3 utilizes a robust chassis with a double wishbone front suspension and an independent multi-link rear suspension. This setup provides a comfortable ride while maintaining good handling characteristics. The X3 30d typically featured ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock Braking System (ABS), Dynamic Stability Control (DSC), and traction control were standard safety features. The suspension tuning was geared towards providing a balance between comfort and handling, making it suitable for both daily commuting and longer journeys.
Market Reception & Comparison
The X3 30d was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and spacious interior. Fuel economy was a strong point, particularly compared to gasoline-powered rivals. However, some critics noted that the diesel engine could be slightly noisy under hard acceleration. Compared to the X3 20d (a lower-powered diesel variant), the 30d offered significantly more performance. Against the X3 M40i, it provided a more economical and relaxed driving experience, albeit with less outright speed. The X3 30d competed with other luxury compact SUVs such as the Audi Q5, Mercedes-Benz GLC, and Acura RDX.
Legacy
The BMW X3 (G01) 30d has proven to be a reliable and durable SUV. The B57 engine is known for its longevity, and the eight-speed Steptronic transmission is generally trouble-free. On the used car market, the X3 30d remains a popular choice, offering a good balance of performance, fuel economy, and luxury. Regular maintenance, including oil changes and filter replacements, is crucial for ensuring long-term reliability. The mild hybrid system has also proven to be relatively robust, with few reported issues. The X3 30d represents a well-engineered and capable SUV that continues to appeal to buyers seeking a premium driving experience.
