The BMW X3 (F25) 28i xDrive Steptronic, produced from 2010 to 2012, represents a significant iteration of BMW’s compact luxury SUV. Positioned as a mid-range offering within the F25 X3 lineup, it bridged the gap between the entry-level 2.0i models and the performance-oriented 35i variants. This model aimed to deliver a balance of performance, efficiency, and luxury, appealing to buyers seeking a versatile and capable SUV with BMW’s renowned driving dynamics. The F25 generation marked a substantial departure from its predecessor, growing in size and adopting a more modern design language, and the 28i variant played a key role in establishing the X3 as a competitive force in the burgeoning luxury crossover segment in North America and Europe.
Technical Specifications
| Brand | BMW |
| Model | X3 |
| Generation | X3 (F25) |
| Type | 28i (258 Hp) xDrive Steptronic |
| Start of production | 2010 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 12.3 l/100 km (19.1 US mpg, 23 UK mpg, 8.1 km/l) |
| Fuel consumption (extra urban) | 7.1 l/100 km (33.1 US mpg, 39.8 UK mpg, 14.1 km/l) |
| Fuel consumption (combined) | 9 l/100 km (26.1 US mpg, 31.4 UK mpg, 11.1 km/l) |
| CO2 emissions | 210 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.9 sec |
| Acceleration 0 – 62 mph | 6.9 sec |
| Acceleration 0 – 60 mph | 6.6 sec |
| Maximum speed | 230 km/h (142.92 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 6.8 kg/Hp, 147.9 Hp/tonne |
| Weight-to-torque ratio | 5.6 kg/Nm, 177.7 Nm/tonne |
| Power | 258 Hp @ 6600 rpm |
| Torque | 310 Nm @ 2600-3000 rpm (228.64 lb.-ft. @ 2600-3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N52B30A |
| Engine displacement | 2996 cm3 (182.83 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 85 mm (3.35 in.) |
| Piston Stroke | 88 mm (3.46 in.) |
| Compression ratio | 10.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 9.3 l (9.83 US qt | 8.18 UK qt) |
| Kerb Weight | 1745 kg (3847.07 lbs.) |
| Max. weight | 2305 kg (5081.66 lbs.) |
| Max load | 560 kg (1234.59 lbs.) |
| Trunk (boot) space – minimum | 550 l (19.42 cu. ft.) |
| Trunk (boot) space – maximum | 1600 l (56.5 cu. ft.) |
| Fuel tank capacity | 67 l (17.7 US gal | 14.74 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 | 4648 mm (182.99 in.) |
| Width | 1881 mm (74.06 in.) |
| Width including mirrors | 2098 mm (82.6 in.) |
| Height | 1661 mm (65.39 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1616 mm (63.62 in.) |
| Rear (Back) track | 1632 mm (64.25 in.) |
| Ride height (ground clearance) | 212 mm (8.35 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle (turning diameter) | 11.9 m (39.04 ft.) |
| Approach angle | 25.7° |
| Departure angle | 22.6° |
| Ramp-over (brakeover) angle | 19.4° |
| Wading depth | 500 mm (19.69 in.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| 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 | 225/60 R17 |
| Wheel rims size | 7.5J x 17 |
Powertrain & Engine Architecture
The heart of the X3 28i is the N52B30A, a 3.0-liter inline-six cylinder engine. This engine is a naturally aspirated powerplant known for its smooth operation and responsive power delivery. The N52 featured double VANOS (variable valve timing) for both intake and exhaust camshafts, optimizing performance and efficiency across the rev range. Fuel delivery is managed by a multi-port fuel injection system. The engine produces 258 horsepower at 6600 rpm and 310 Nm (228.64 lb-ft) of torque between 2600 and 3000 rpm. This power is channeled through an eight-speed Steptronic automatic transmission, a key feature of this variant. The Steptronic transmission offered both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector. The xDrive all-wheel-drive system distributes power between the front and rear axles as needed, enhancing traction and stability in various driving conditions.
Driving Characteristics
The X3 28i xDrive Steptronic offered a refined and comfortable driving experience. While not as overtly sporty as the 35i model, the 28i provided ample power for everyday driving and highway cruising. The eight-speed automatic transmission contributed to smooth gear changes and helped to keep the engine in its optimal power band. Acceleration from 0 to 60 mph took approximately 6.6 seconds. The xDrive system provided confident handling in inclement weather, and the SUV felt stable and composed even when pushed. Compared to the manual transmission versions, the Steptronic automatic prioritized ease of use and convenience over outright performance, though it didn’t sacrifice much in terms of responsiveness.
Equipment & Trim Levels
The X3 28i typically came standard with features such as leatherette upholstery, automatic climate control, a multi-function steering wheel, and a BMW Professional radio system. Optional extras included leather upholstery, a panoramic sunroof, navigation system, heated front seats, and a premium sound system. Trim levels were relatively simple, with most customization options available as individual add-ons. The focus was on providing a well-equipped vehicle with a premium feel, appealing to buyers who valued comfort and convenience.
Chassis & Braking
The F25 X3 featured a robust chassis with a MacPherson strut front suspension and a multi-link rear suspension. This setup provided a good balance of ride comfort and handling precision. The 28i model typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) were standard safety features. The suspension was tuned to prioritize comfort, but still offered a reasonably engaging driving experience.
Market Reception & Comparison
The X3 28i xDrive Steptronic was generally well-received by automotive critics. It was praised for its comfortable ride, spacious interior, and refined powertrain. However, some reviewers noted that the 28i lacked the outright performance of the 35i model. Fuel economy was considered average for its class, with combined fuel consumption around 9 l/100 km (26.1 US mpg). Compared to the 2.0i models, the 28i offered a significant performance upgrade, making it a more appealing option for drivers who prioritized power and responsiveness. The 28i also offered a more luxurious experience than some of its competitors, such as the Acura RDX and Audi Q5.
Legacy
The N52B30A engine, found in the X3 28i, is known for its reliability when properly maintained. Common issues include oil leaks and cooling system failures, but these are generally addressable with preventative maintenance. The eight-speed Steptronic transmission has also proven to be durable. Today, used X3 28i models represent a relatively affordable entry point into BMW ownership. They offer a good balance of luxury, performance, and practicality, making them a popular choice among used car buyers. While not as sought-after as the 35i variant, the 28i remains a capable and comfortable SUV that can provide years of reliable service.
