The BMW X5 (G05) 40d, a diesel-powered Sport Activity Vehicle (SAV), was produced from February 2020 to February 2023. Positioned as a mid-range offering within the G05 X5 lineup, it bridged the gap between the entry-level 30d and the performance-oriented M50i models. This variant combined a 3.0-liter inline-six diesel engine with mild hybrid technology and BMW’s xDrive all-wheel-drive system, paired exclusively with an 8-speed Steptronic automatic transmission. The 40d aimed to deliver a balance of performance, efficiency, and luxury, appealing to buyers seeking a capable and refined SUV.
Technical Specifications
| Brand | BMW |
| Model | X5 |
| Generation | X5 (G05) |
| Type (Engine) | 40d (340 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | February, 2020 |
| End of production | February, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SAV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 7.2-7.8 l/100 km (32.7 – 30.2 US mpg) |
| Fuel consumption (extra urban) | 5.1-5.6 l/100 km (46.1 – 42 US mpg) |
| Fuel consumption (combined) | 5.9-6.4 l/100 km (39.9 – 36.8 US mpg) |
| CO2 emissions | 154-167 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.5 sec |
| Acceleration 0 – 62 mph | 5.5 sec |
| Acceleration 0 – 60 mph | 5.2 sec |
| Maximum speed | 245 km/h (152.24 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 6.5 kg/Hp |
| Weight-to-torque ratio | 3.1 kg/Nm |
| Electric motor power | 11 Hp |
| Power | 340 Hp @ 4400 rpm |
| Torque | 700 Nm @ 1750-2250 rpm (516.29 lb.-ft. @ 1750-2250 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 |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 2200 kg (4850.17 lbs.) |
| Max. weight | 2940 kg (6481.59 lbs.) |
| Max load | 740 kg (1631.42 lbs.) |
| Trunk (boot) space – minimum | 650 l (22.95 cu. ft.) |
| Trunk (boot) space – maximum | 1870 l (66.04 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (8%) | 3500 kg (7716.18 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4922 mm (193.78 in.) |
| Width | 2004 mm (78.9 in.) |
| Height | 1745 mm (68.7 in.) |
| Wheelbase | 2975 mm (117.13 in.) |
| Front track | 1666 mm (65.59 in.) |
| Rear track | 1685 mm (66.34 in.) |
| Ride height (ground clearance) | 214 mm (8.43 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle | 12.6 m (41.34 ft.) |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Number of gears | 8 |
| Gearbox type | Automatic transmission Steptronic |
INTRODUCTION
The G05 generation BMW X5, launched in 2018, represented the fourth iteration of BMW’s popular mid-size luxury SUV. The 40d variant, introduced in February 2020, quickly became a significant seller, particularly in European and Asian markets where diesel engines remained highly favored. It sat within the G05 range alongside the 30d (entry-level), 40i (gasoline), M50i (high-performance gasoline), and later, plug-in hybrid models. The 40d aimed to provide a compelling blend of performance, fuel economy, and refinement, making it a practical choice for families and long-distance drivers.
Powertrain & Engine Architecture
At the heart of the X5 40d lies the BMW B57D30B, a 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 a sophisticated common-rail direct injection system operating at pressures up to 2,500 bar. A twin-scroll turbocharger with variable geometry turbine (VGT) technology delivers strong low-end torque and responsive performance. The engine also incorporates an intercooler to further enhance efficiency. The mild hybrid system, utilizing a 48V starter-generator, provides a power boost during acceleration and enables smoother start-stop operation, contributing to improved fuel economy. The 8-speed Steptronic automatic transmission, a hallmark of BMW’s engineering, offers quick and precise shifts. It features a torque converter lockup clutch for enhanced efficiency and a wide gear ratio spread to optimize both performance and fuel consumption.
Driving Characteristics
The X5 40d delivers a refined and capable driving experience. The 700 Nm (516 lb-ft) of torque, available from 1750-2250 rpm, provides effortless acceleration and strong pulling power, making it well-suited for towing and overtaking. While not as overtly sporty as the M50i, the 40d’s 0-60 mph time of around 5.2 seconds is more than adequate for most drivers. The Steptronic transmission is generally smooth and responsive, although some drivers may prefer the more direct control of a manual gearbox. The xDrive all-wheel-drive system provides excellent traction in all weather conditions, enhancing stability and confidence. Compared to the 30d, the 40d offers a noticeable performance upgrade, while remaining more fuel-efficient than the 40i or M50i.
Equipment & Trim Levels
The X5 40d typically came well-equipped as standard. Features included BMW’s iDrive infotainment system with a 12.3-inch touchscreen display, navigation, Apple CarPlay and Android Auto compatibility, leather upholstery, power-adjustable front seats with memory function, automatic climate control, and a suite of advanced driver-assistance systems such as lane departure warning, forward collision warning, and automatic emergency braking. Optional extras included a panoramic sunroof, premium sound system (Harman Kardon or Bowers & Wilkins), adaptive suspension, massaging seats, and a variety of cosmetic enhancements. Trim levels varied by market, but generally offered packages that bundled popular options together.
Chassis & Braking
The G05 X5 utilizes a robust chassis with a double-wishbone front suspension and an independent multi-link rear suspension. This setup provides a comfortable ride quality while maintaining good handling characteristics. The 40d variant typically featured ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock Braking System (ABS), Dynamic Stability Control (DSC), and All-Season Traction (AST) were standard features, enhancing safety and control. The suspension tuning was generally geared towards comfort, but optional adaptive suspension systems were available to allow drivers to adjust the ride firmness.
Market Reception & Comparison
The X5 40d was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, spacious interior, and advanced technology. Critics noted that the diesel engine provided a good balance of performance and fuel economy, making it a practical choice for long-distance travel. Compared to the gasoline-powered 40i, the 40d offered superior fuel efficiency and torque, while the 40i provided a slightly more responsive and engaging driving experience. The 40d also offered a more affordable entry point into the X5 range compared to the high-performance M50i.
Legacy
The B57 engine family, including the B57D30B found in the X5 40d, has proven to be remarkably reliable. With proper maintenance, these engines are capable of exceeding 200,000 miles. The X5 40d remains a popular choice in the used car market, offering a compelling combination of luxury, performance, and practicality. However, potential buyers should be aware of the potential for diesel particulate filter (DPF) issues, particularly on vehicles that are primarily driven on short trips. Overall, the X5 40d represents a well-engineered and capable SUV that continues to provide a rewarding ownership experience.
