The BMW X5 (G05) 40i xDrive, produced from 2018 to 2020, represents a significant iteration of BMW’s popular Sports Activity Vehicle (SAV). Positioned as a mid-range offering within the G05 X5 lineup, it bridged the gap between the entry-level 30i and the performance-oriented M50i models. This variant, equipped with the B58B30C inline-six engine and the Steptronic 8-speed automatic transmission, was designed to appeal to buyers seeking a balance of performance, luxury, and practicality, particularly in the North American market where larger SUVs with powerful engines are highly favored. The availability of a seven-seat configuration further broadened its appeal to families.
Technical Specifications
| Brand | BMW |
| Model | X5 |
| Generation | X5 (G05) |
| Type | 40i (340 Hp) xDrive Steptronic 7 Seat |
| Start of production | 2018 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SAV |
| Seats | 7 |
| Doors | 5 |
| Fuel consumption (combined) | 8.5-8.8 l/100 km (27.7 – 26.7 US mpg) |
| CO2 emissions | 193-200 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.5 sec |
| Acceleration 0 – 62 mph | 5.5 sec |
| Acceleration 0 – 60 mph | 5.2 sec |
| Maximum speed | 243 km/h (150.99 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6.3 kg/Hp, 159.3 Hp/tonne |
| Weight-to-torque ratio | 4.7 kg/Nm, 210.8 Nm/tonne |
| Power | 340 Hp @ 5500-6500 rpm |
| Power per litre | 113.4 Hp/l |
| Torque | 450 Nm @ 1500-5200 rpm (331.9 lb.-ft. @ 1500-5200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30C |
| Engine displacement | 2998 cm3 (182.95 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 12.6 l (13.31 US qt | 11.09 UK qt) |
| Kerb Weight | 2135 kg (4706.87 lbs.) |
| Max. weight | 3010 kg (6635.91 lbs.) |
| Max load | 875 kg (1929.04 lbs.) |
| Trunk (boot) space – minimum | 645 l (22.78 cu. ft.) |
| Trunk (boot) space – maximum | 1860 l (65.69 cu. ft.) |
| Fuel tank capacity | 83 l (21.93 US gal | 18.26 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2700 kg (5952.48 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 140 kg (308.65 lbs.) |
| Length | 4922 mm (193.78 in.) |
| Width | 2004 mm (78.9 in.) |
| Width including mirrors | 2218 mm (87.32 in.) |
| Height | 1745 mm (68.7 in.) |
| Wheelbase | 2975 mm (117.13 in.) |
| Front track | 1666 mm (65.59 in.) |
| Rear (Back) track | 1685 mm (66.34 in.) |
| Front overhang | 874 mm (34.41 in.) |
| Rear overhang | 1073 mm (42.24 in.) |
| Ride height (ground clearance) | 214 mm (8.43 in.) |
| Drag coefficient (Cd) | 0.32 |
| Minimum turning circle (turning diameter) | 12.6 m (41.34 ft.) |
| Approach angle | 25.2° |
| Departure angle | 22.3° |
| Ramp-over (brakeover) angle | 20.2° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Double wishbone |
| Rear suspension | Double wishbone |
| 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 | 255/55 R18 |
| Wheel rims size | 8.5J x 18 |
Powertrain & Engine Architecture
At the heart of the X5 40i lies the B58B30C 3.0-liter inline-six engine. This engine is a member of BMW’s modular engine family, known for its smooth power delivery and efficiency. The B58 utilizes a single twin-scroll turbocharger, direct fuel injection, and Double-VANOS variable valve timing for both intake and exhaust. This combination results in a broad torque curve, peaking at 450 Nm (331.9 lb-ft) between 1500 and 5200 rpm. The engine’s output of 340 horsepower is available between 5500 and 6500 rpm. The engine is longitudinally mounted, powering all four wheels through BMW’s xDrive all-wheel-drive system.
The Steptronic 8-speed automatic transmission is a crucial component of this powertrain. This transmission is known for its quick and smooth shifts, contributing to both performance and fuel economy. It features a torque converter and allows for manual gear selection via steering wheel-mounted paddles. The transmission is programmed to adapt to the driver’s style, offering both comfort-oriented and sport-oriented shift patterns.
Driving Characteristics
The X5 40i delivers a refined and capable driving experience. The 340 hp and 450 Nm of torque provide ample power for everyday driving and confident overtaking. Acceleration from 0 to 60 mph takes approximately 5.2 seconds. While not as aggressively tuned as the M50i, the 40i offers a satisfying level of performance. The eight-speed automatic transmission contributes to smooth acceleration and efficient cruising. The xDrive all-wheel-drive system provides excellent traction in various weather conditions. Compared to the base 30i model, the 40i offers a noticeable improvement in acceleration and overall responsiveness. It also feels more composed at higher speeds.
Equipment & Trim Levels
The X5 40i came standard with a generous array of features, including BMW’s iDrive infotainment system with a 12.3-inch touchscreen display, navigation, Apple CarPlay compatibility, a premium sound system, leather upholstery, power-adjustable front seats, and a panoramic sunroof. Optional extras included upgraded leather options, a head-up display, adaptive cruise control, a parking assistant package, and a rear-seat entertainment system. The seven-seat configuration was a popular option, adding versatility for families. Trim levels were relatively simple, with most customization occurring through individual options.
Chassis & Braking
The G05 X5 utilizes a robust chassis with a double-wishbone suspension setup at both the front and rear. This suspension design provides a comfortable ride while maintaining good handling characteristics. The X5 40i typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. ABS, dynamic stability control, and traction control are standard safety features. The suspension tuning is geared towards comfort, but the X5 40i still offers a reasonably engaging driving experience.
Market Reception & Comparison
The X5 40i was well-received by automotive critics, who praised its balanced performance, luxurious interior, and advanced technology. It was often seen as the sweet spot in the X5 lineup, offering a compelling combination of features and performance at a reasonable price point. Compared to the 30i, the 40i provided a significant boost in power and refinement. Compared to the M50i, it offered a more comfortable ride and better fuel economy, albeit with less outright performance. Fuel economy figures averaged around 26-28 mpg in combined driving, making it relatively efficient for a vehicle of its size and class.
Legacy
The B58 engine has proven to be remarkably reliable, and the X5 40i is generally considered a well-built and durable vehicle. On the used car market, these models hold their value relatively well, particularly those with low mileage and a comprehensive service history. Common maintenance items include oil changes, brake pad replacements, and tire rotations. The Steptronic transmission is also known for its reliability, but regular fluid changes are essential to ensure its longevity. The X5 40i represents a strong contender in the luxury mid-size SUV segment, offering a blend of performance, comfort, and practicality that continues to appeal to buyers today.
