The BMW X4 (G02 LCI), specifically the 30d variant with 286 horsepower, represents a mid-cycle refresh of the second-generation X4 Sports Activity Coupe (SAC). Introduced in 2021, this model blends the practicality of an SUV with the sleeker profile of a coupe. The “LCI” designation (Life Cycle Impulse) signifies a significant facelift, incorporating updated styling, technology, and powertrain refinements. Positioned as a mid-range offering within the X4 lineup, the 30d aimed to balance performance, efficiency, and luxury for buyers seeking a dynamic driving experience. It sits above the 20d models and below the more potent M40i and X4 M variants.
Technical Specifications
| Brand | BMW |
| Model | X4 |
| Generation | X4 (G02 LCI, facelift 2021) |
| Type (Engine) | 30d (286 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | 2021 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SAC (Sports Activity Coupe) |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 6.1-7 l/100 km (38.6 – 33.6 US mpg, 46.3 – 40.4 UK mpg, 16.4 – 14.3 km/l) |
| CO2 emissions (WLTP) | 161-182 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 | 6.8 kg/Hp, 147.8 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 335.9 Nm/tonne |
| Electric motor power | 11 Hp |
| Electric motor location | Front, Longitudinal |
| Power | 286 Hp @ 4000 rpm |
| Torque | 650 Nm @ 1500-2500 rpm (479.42 lb.-ft. @ 1500-2500 rpm) |
| 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 |
| Valvetrain | DOHC |
| Engine oil capacity | 7 l (7.4 US qt | 6.16 UK qt) |
| Kerb Weight | 1935 kg (4265.94 lbs.) |
| Max. weight | 2530 kg (5577.7 lbs.) |
| Max load | 595 kg (1311.75 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%) | 2400 kg (5291.09 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 4751 mm (187.05 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) | 0.29-0.36 |
| Minimum turning circle (turning diameter) | 12.1 m (39.7 ft.) |
| Approach angle | 25° |
| Departure angle | 22.2° |
| Ramp-over (brakeover) angle | 20° |
| Wading depth | 500 mm (19.69 in.) |
| Drivetrain Architecture | ICE and electric motor permanently drive all four wheels. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Spring Strut |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/60 R18 |
| Wheel rims size | 7J x 18 |
INTRODUCTION
The BMW X4 G02 LCI 30d is a five-door Sports Activity Coupe that debuted in 2021 as part of the facelift for the second-generation X4. Built on the BMW CLAR platform (Cluster Architecture), it shares its underpinnings with the X3, but distinguishes itself with a more aggressively sloping roofline and a sportier aesthetic. The 30d variant, powered by a 3.0-liter inline-six diesel engine, was a key offering in European and select global markets, providing a balance between performance and fuel economy. The introduction of 48V mild-hybrid technology further enhanced efficiency and refinement.
Powertrain & Engine Architecture
At the heart of the X4 30d lies the BMW B57D30B engine, a 3.0-liter inline-six diesel engine. This engine is renowned for its smoothness and robust power delivery. The B57 utilizes a sophisticated common-rail direct injection system, operating at extremely high pressures to optimize combustion. A twin-scroll turbocharger, coupled with an intercooler, provides ample boost across the rev range. The engine also features variable valve timing (VANOS) and Double-VANOS for optimized efficiency and performance. The 30d incorporates a 48V mild-hybrid system, adding a small electric motor that assists the engine during acceleration and allows for extended coasting with the engine off, improving fuel economy. The engine is paired with BMW’s eight-speed Steptronic automatic transmission, known for its quick and smooth shifts. This transmission features a torque converter and allows for both automatic and manual gear selection via steering wheel-mounted paddles.
Driving Characteristics
The X4 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. While not as overtly sporty as the M40i, the 30d offers ample power for confident overtaking and highway cruising. The Steptronic transmission is well-tuned, providing seamless gear changes and contributing to a relaxed driving experience. The xDrive all-wheel-drive system ensures excellent traction in various weather conditions. Compared to the lower-powered 20d models, the 30d offers a noticeable performance upgrade, while remaining more fuel-efficient than the higher-output gasoline variants.
Equipment & Trim Levels
The X4 30d typically came well-equipped as standard. Interior features included leather upholstery, power-adjustable front seats with memory function, a BMW iDrive infotainment system with a 12.3-inch touchscreen display, and a premium sound system. Standard safety features included automatic emergency braking, lane departure warning, and parking sensors. Optional extras included a head-up display, panoramic sunroof, adaptive cruise control, and upgraded interior trim options. Trim levels varied by market, but generally offered packages that added features like larger wheels, enhanced exterior styling, and more luxurious interior appointments.
Chassis & Braking
The X4 30d utilizes a MacPherson strut front suspension and a multi-link rear suspension, providing a comfortable yet controlled ride. The suspension is tuned to balance handling and comfort, offering a good compromise for everyday driving. The vehicle is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The xDrive all-wheel-drive system intelligently distributes torque between the front and rear axles, optimizing traction and stability. The steering is precise and well-weighted, providing a connected feel to the driver.
Market Reception & Comparison
The X4 30d was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and stylish design. The mild-hybrid system was noted for its contribution to improved fuel economy. Compared to the X4 20d, the 30d offered a significant performance boost, making it a more appealing option for drivers who prioritize power. Against competitors like the Audi Q5 and Mercedes-Benz GLC Coupe, the X4 30d held its own, offering a compelling blend of performance, luxury, and practicality. Fuel economy figures of 6.1-7 l/100km were competitive within its class.
Legacy
The BMW B57 engine family, including the B57D30B found in the X4 30d, has proven to be remarkably reliable. With proper maintenance, these engines are known to withstand high mileage. The 8-speed Steptronic transmission is also generally considered durable. On the used car market, the X4 30d represents a good value proposition, offering a premium driving experience at a more accessible price point. However, potential buyers should be aware of the maintenance requirements associated with a diesel engine, including regular servicing of the diesel particulate filter (DPF). The combination of a powerful engine, refined transmission, and all-wheel-drive capability ensures that the X4 30d remains a desirable and capable SUV for years to come.
