The BMW X3 (G01) M40i xDrive Steptronic, produced from November 2017 to June 2018, represents a performance-oriented variant within the third generation of the X3 Sports Activity Vehicle (SAV). Positioned as a mid-to-high range trim, the M40i aimed to deliver a more engaging driving experience than the base models while remaining practical for everyday use. It served as a key competitor to performance SUVs from Audi and Mercedes-Benz in the North American and European markets. This model bridged the gap between the standard X3 trims and the full-fledged X3 M, offering a significant power upgrade without the higher price tag and more aggressive tuning of the ‘M’ variant.
Technical Specifications
| Brand | BMW |
| Model | X3 |
| Generation | X3 (G01) |
| Type (Engine) | M40i (360 Hp) xDrive Steptronic |
| Start of production | November, 2017 |
| End of production | June, 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SAV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 10.8-11.1 l/100 km (21.8 – 21.2 US mpg, 26.2 – 25.4 UK mpg, 9.3 – 9 km/l) |
| Fuel consumption (economy) – extra urban | 6.7-7.0 l/100 km (35.1 – 33.6 US mpg, 42.2 – 40.4 UK mpg, 14.9 – 14.3 km/l) |
| Fuel consumption (economy) – combined | 8.2-8.4 l/100 km (28.7 – 28 US mpg, 34.4 – 33.6 UK mpg, 12.2 – 11.9 km/l) |
| CO2 emissions | 188-193 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.8 sec |
| Acceleration 0 – 62 mph | 4.8 sec |
| Acceleration 0 – 60 mph | 4.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5 kg/Hp, 198.9 Hp/tonne |
| Weight-to-torque ratio | 3.6 kg/Nm, 276.2 Nm/tonne |
| Power | 360 Hp @ 5500-6500 rpm |
| Power per litre | 120.1 Hp/l |
| Torque | 500 Nm @ 1520-4800 rpm (368.78 lb.-ft. @ 1520-4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30B |
| 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 | 13.5 l (14.27 US qt | 11.88 UK qt) |
| Kerb Weight | 1810 kg (3990.37 lbs.) |
| Max. weight | 2455 kg (5412.35 lbs.) |
| Max load | 645 kg (1421.98 lbs.) |
| Trunk (boot) space – minimum | 550 l (19.42 cu. ft.) |
| Trunk (boot) space – maximum | 1600 l (56.5 cu. ft.) |
| Fuel tank capacity | 65 l (17.17 US gal | 14.3 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 4716 mm (185.67 in.) |
| Width | 1897 mm (74.69 in.) |
| Height | 1676 mm (65.98 in.) |
| Wheelbase | 2864 mm (112.76 in.) |
| Front track | 1610 mm (63.39 in.) |
| Rear (Back) track | 1594 mm (62.76 in.) |
| Ride height (ground clearance) | 204 mm (8.03 in.) |
| Drag coefficient (Cd) | 0.33 |
| Minimum turning circle (turning diameter) | 12.1 m (39.7 ft.) |
| 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 | Independent multi-link suspension |
| 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 | 245/45 R20 103W; 275/40 R20 106W |
| Wheel rims size | 8.0J x 20; 9.5J x 20 |
INTRODUCTION
The BMW X3 G01 M40i xDrive Steptronic, launched in late 2017, is a performance-focused variant of the third-generation X3. Built on the CLAR platform (Cluster Architecture), it aimed to provide a more dynamic driving experience compared to the standard X3 models. The M40i filled a niche between the mainstream X3 trims and the high-performance X3 M, offering a substantial power increase and sport-tuned components without the significantly higher price point of the dedicated ‘M’ model. It quickly became a popular choice for buyers seeking a blend of luxury, practicality, and performance in a compact SUV.
Powertrain & Engine Architecture
At the heart of the X3 M40i lies the BMW B58B30B inline-six cylinder engine. This 3.0-liter (2998 cc) engine utilizes direct fuel injection and a twin-scroll turbocharger to produce 360 horsepower at 5500-6500 rpm and 500 Nm (368.78 lb-ft) of torque between 1520-4800 rpm. The B58 engine is known for its smooth power delivery and responsiveness. The engine features a Valvetronic system for variable valve timing and lift, optimizing efficiency and performance. Paired with the engine is the ZF 8HP70X eight-speed automatic transmission, marketed by BMW as ‘Steptronic’. This transmission offers smooth and quick shifts, and features a sport mode for more aggressive gear changes. The xDrive all-wheel-drive system intelligently distributes power between the front and rear axles, enhancing traction and stability.
Driving Characteristics
The X3 M40i delivers a noticeably more engaging driving experience than the four-cylinder X3 models. The potent inline-six provides strong acceleration, with a 0-60 mph time of around 4.6 seconds. The eight-speed automatic transmission is well-tuned, providing seamless gear changes in normal driving and responsive shifts in sport mode. The xDrive system provides excellent grip in all weather conditions. While not as track-focused as the X3 M, the M40i offers a well-balanced chassis and precise steering, making it enjoyable to drive on winding roads. The suspension is firmer than the standard X3, contributing to reduced body roll and improved handling. The gear ratios are optimized for both acceleration and highway cruising, providing a comfortable and capable driving experience.
Equipment & Trim Levels
The X3 M40i came standard with a generous array of features, including leather upholstery, power-adjustable front seats with memory function, a panoramic sunroof, and a premium sound system. Standard safety features included automatic emergency braking, lane departure warning, and blind-spot monitoring. Optional extras included adaptive cruise control, a head-up display, and upgraded interior trim options. The M40i also featured unique exterior styling cues, such as a more aggressive front bumper, side skirts, and a rear diffuser. Interior trim options included aluminum mesh, dark wood, and carbon fiber accents.
Chassis & Braking
The X3 M40i utilizes a double-wishbone front suspension and an independent multi-link rear suspension. The suspension components are stiffer than those found in the standard X3, providing improved handling and stability. The M40i is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Larger brake rotors and calipers are used compared to the base X3 models. The electric power steering system offers precise and responsive steering feel. The vehicle’s weight distribution is well-balanced, contributing to its agile handling characteristics.
Market Reception & Comparison
The X3 M40i was generally well-received by automotive critics. It was praised for its powerful engine, engaging driving dynamics, and luxurious interior. Compared to the base X3 models, the M40i offered a significant performance upgrade. Fuel economy was comparable to other performance SUVs in its class, averaging around 28 mpg combined. Compared to the X3 M, the M40i offered a more comfortable ride and a lower price point, making it a more practical choice for everyday use. However, the X3 M offered even more performance and a more aggressive driving experience.
Legacy
The BMW X3 G01 M40i has proven to be a reliable and durable vehicle. The B58 engine is known for its longevity and relatively low maintenance requirements. On the used car market, the M40i holds its value well due to its performance and features. Common maintenance items include oil changes, brake pad replacements, and tire rotations. The X3 M40i remains a popular choice for buyers seeking a sporty and luxurious compact SUV, and continues to be a strong contender in its segment.
