The BMW X3 Long (G48) 30L xDrive Steptronic, introduced in February 2025, represents a significant expansion of the X3 lineup, specifically tailored for the Chinese market. This extended-wheelbase version of the popular compact luxury SAV (Sports Activity Vehicle) offers increased rear passenger space and enhanced comfort, catering to the preferences of buyers in that region. The 30L designation indicates the engine powering this variant: a 2.0-liter turbocharged inline-four producing 258 horsepower, paired with BMW’s eight-speed Steptronic automatic transmission and the xDrive all-wheel-drive system. It occupies a mid-range position within the X3 Long family, offering a balance of performance and efficiency.
Technical Specifications
| Brand | BMW |
| Model | X3 |
| Generation | X3 Long (G48) |
| Type (Engine) | 30L (258 Hp) xDrive Steptronic |
| Start of production | February, 2025 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SAV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (combined) | 8.3 l/100 km (28.3 US mpg, 34 UK mpg, 12 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.6 sec |
| Acceleration 0 – 62 mph | 6.6 sec |
| Acceleration 0 – 60 mph | 6.3 sec |
| Maximum speed | 235 km/h (146.02 mph) |
| Emission standard | China VI |
| Weight-to-power ratio | 7.4 kg/Hp, 134.7 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 208.9 Nm/tonne |
| Power | 258 Hp @ 5000 rpm |
| Power per litre | 129.1 Hp/l |
| Torque | 400 Nm @ 1600-4500 rpm (295.02 lb.-ft. @ 1600-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B48B20W |
| Engine displacement | 1998 cm3 (121.93 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-scroll turbo, Intercooler |
| Valvetrain | VALVETRONIC, Double-VANOS |
| Engine systems | Start & Stop System, Particulate filter |
| Kerb Weight | 1915 kg (4221.85 lbs.) |
| Max. weight | 2450 kg (5401.33 lbs.) |
| Max load | 535 kg (1179.47 lbs.) |
| Fuel tank capacity | 65 l (17.17 US gal | 14.3 UK gal) |
| Length | 4865 mm (191.54 in.) |
| Width | 1920 mm (75.59 in.) |
| Height | 1664 mm (65.51 in.) |
| Wheelbase | 2975 mm (117.13 in.) |
| Front track | 1618 mm (63.7 in.) |
| Rear track | 1623 mm (63.9 in.) |
| Ride height (ground clearance) | 214 mm (8.43 in.) |
| Approach angle | 20° |
| Departure angle | 22° |
| Drivetrain Architecture | All-wheel drive (4×4) |
| Number of gears | 8 |
| Gearbox type | automatic transmission Steptronic |
| Front suspension | Spring Strut, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| 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 (Front) | 255/45 R20; 255/40 R21 |
| Tires size (Rear) | 285/40 R20; 285/35 R21 |
| Wheel rims size | 20; 21 |
Powertrain & Engine Architecture
At the heart of the X3 Long 30L lies BMW’s B48B20W 2.0-liter inline-four cylinder engine. This engine is a member of BMW’s modular engine family, known for its efficiency and performance. It utilizes direct fuel injection, a twin-scroll turbocharger with an intercooler, and BMW’s VALVETRONIC variable valve timing and Double-VANOS variable camshaft timing systems. These technologies work in concert to optimize combustion, improve throttle response, and enhance fuel economy. The engine produces a peak output of 258 horsepower at 5000 rpm and 400 Nm (295 lb-ft) of torque between 1600 and 4500 rpm. The engine is longitudinally mounted at the front of the vehicle. The eight-speed Steptronic automatic transmission is a crucial component, offering smooth and quick gear changes. It’s designed to work seamlessly with the engine’s power delivery, providing optimal acceleration and efficiency.
Driving Characteristics
The X3 Long 30L delivers a refined and comfortable driving experience. The 258 hp engine, coupled with the eight-speed automatic, provides ample power for everyday driving and highway cruising. While not as overtly sporty as the higher-output X3 variants, the 30L offers a responsive and capable driving experience. The xDrive all-wheel-drive system ensures excellent traction in various weather conditions. The Steptronic transmission is programmed for efficiency, with taller gear ratios in the higher gears to reduce engine speed and fuel consumption. Compared to a manual transmission equipped X3, the automatic prioritizes ease of use and comfort over outright driver engagement.
Equipment & Trim Levels
The X3 Long 30L typically comes well-equipped as standard. Features generally include BMW’s iDrive infotainment system with a large touchscreen display, leather upholstery, power-adjustable front seats, automatic climate control, and a suite of advanced driver-assistance systems (ADAS) such as lane departure warning, forward collision warning, and automatic emergency braking. Optional extras often include a panoramic sunroof, premium sound system, head-up display, and upgraded interior trim materials. The extended wheelbase translates to significantly more rear legroom compared to the standard X3, making it particularly appealing to passengers.
Chassis & Braking
The X3 Long 30L utilizes a robust chassis designed to handle the increased weight and dimensions of the extended-wheelbase model. The front suspension employs spring struts with a transverse stabilizer bar, while the rear suspension features an independent multi-link setup, also with a stabilizer bar. This configuration provides a good balance of ride comfort and handling precision. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The ABS (Anti-lock Braking System) is standard, enhancing safety and control during emergency braking situations. The electric power steering offers precise and responsive steering feel.
Market Reception & Comparison
The X3 Long 30L has been well-received in the Chinese market, where the demand for long-wheelbase luxury vehicles is high. Critics have praised the increased rear passenger space and comfortable ride quality. Compared to other X3 variants, the 30L offers a more accessible price point while still delivering a premium driving experience. Fuel economy is competitive within its class, and the B48 engine has proven to be relatively reliable. However, some reviewers have noted that the 30L’s performance is not as exhilarating as that of the higher-output X3 models, such as the M40i.
Legacy
The BMW B48 engine family has established a reputation for reliability and durability, and the X3 Long 30L is expected to hold its value well in the used car market. The extended wheelbase and luxurious features will likely continue to appeal to buyers seeking a comfortable and spacious luxury SUV. As with any modern vehicle, regular maintenance and adherence to BMW’s recommended service intervals are crucial for ensuring long-term reliability. The X3 Long 30L represents a strategic move by BMW to cater to the specific needs and preferences of the Chinese market, and it is poised to remain a popular choice among luxury SUV buyers in that region.
