The BMW 3 Series Sedan (E90 LCI), specifically the 325d variant with the Steptronic automatic transmission, represents a significant iteration of BMW’s iconic sports sedan. Produced from 2009 to 2010, this model falls within the LCI (Life Cycle Impulse) facelift of the E90 generation, bringing with it revised styling, updated technology, and refined engine options. The 325d Steptronic occupied a middle ground in the 3 Series lineup, offering a balance between performance, fuel efficiency, and comfort, appealing to buyers seeking a premium driving experience without the higher price tag of the more powerful 335d or the sport-focused 335i.
Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Sedan (E90 LCI, facelift 2008) |
| Type (Engine) | 325d (197 Hp) Steptronic |
| Start of production | 2009 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 8.1 l/100 km (29 US mpg, 34.9 UK mpg, 12.3 km/l) |
| Fuel consumption (extra urban) | 5.1 l/100 km (46.1 US mpg, 55.4 UK mpg, 19.6 km/l) |
| Fuel consumption (combined) | 6.2 l/100 km (37.9 US mpg, 45.6 UK mpg, 16.1 km/l) |
| CO2 emissions | 164 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.6 sec |
| Acceleration 0 – 62 mph | 7.6 sec |
| Acceleration 0 – 60 mph | 7.2 sec |
| Maximum speed | 233 km/h (144.78 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.8 kg/Hp, 128.3 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 260.6 Nm/tonne |
| Power | 197 Hp @ 4000 rpm |
| Torque | 400 Nm @ 1300-3250 rpm (295.02 lb.-ft. @ 1300-3250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M57D30TU2 |
| 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 | 17:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant | 8.2 l (8.66 US qt | 7.21 UK qt) |
| Kerb Weight | 1535 kg (3384.1 lbs.) |
| Max. weight | 2055 kg (4530.5 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – minimum | 460 l (16.24 cu. ft.) |
| Fuel tank capacity | 61 l (16.11 US gal | 13.42 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4531 mm (178.39 in.) |
| Width | 1817 mm (71.54 in.) |
| Width including mirrors | 1989 mm (78.31 in.) |
| Height | 1421 mm (55.94 in.) |
| Wheelbase | 2760 mm (108.66 in.) |
| Front track | 1500 mm (59.06 in.) |
| Rear (Back) track | 1529 mm (60.2 in.) |
| Ride height (ground clearance) | 144 mm (5.67 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle (turning diameter) | 11.0 m (36.09 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission |
| Front suspension | Independent coil spring |
| 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 | 225/45 R17 91W |
| Wheel rims size | 8J x 17 |
Powertrain & Engine Architecture
The heart of the 325d Steptronic is the M57D30TU2, a 3.0-liter inline-six diesel engine. This engine is a descendant of BMW’s renowned M57 series, known for its durability and strong low-end torque. The ‘TU2’ designation signifies an updated version of the engine, incorporating improvements to the fuel injection system, turbocharger, and engine management software. The engine utilizes a second-generation common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. A variable geometry turbocharger (VGT) is employed to enhance responsiveness across the rev range and maximize power output. The engine produces 197 horsepower at 4,000 rpm and a substantial 400 Nm (295 lb-ft) of torque between 1,300 and 3,250 rpm. The Steptronic transmission is a 6-speed automatic gearbox, offering smooth shifts and a torque converter for enhanced drivability. It features adaptive shift programs that adjust to the driver’s style and driving conditions.
Driving Characteristics
The 325d Steptronic delivers a refined and comfortable driving experience. The abundant low-end torque from the diesel engine provides strong acceleration in everyday driving situations, making it easy to navigate city streets and merge onto highways. While not as overtly sporty as the 335i, the 325d offers ample power for spirited driving. The Steptronic transmission contributes to a relaxed driving experience, particularly during long journeys. Compared to the 6-speed manual version, the automatic offers slightly reduced responsiveness, but it compensates with greater convenience. The gear ratios are tuned for a balance between fuel efficiency and performance, with a relatively tall final drive to maximize highway mileage.
Equipment & Trim Levels
The 325d Steptronic typically came equipped with a generous array of standard features, including automatic climate control, power windows and mirrors, a multi-function steering wheel, and a BMW Professional radio system. Upholstery was typically cloth, although leather options were available. Common optional extras included a sunroof, navigation system, upgraded audio system, sport seats, and parking sensors. The LCI facelift brought subtle interior revisions, including updated trim materials and improved ergonomics.
Chassis & Braking
The E90 3 Series features a sophisticated chassis design, with independent suspension at all four corners. The front suspension utilizes MacPherson struts, while the rear employs a multi-link setup. This configuration provides a good balance between ride comfort and handling precision. The 325d Steptronic 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.
Market Reception & Comparison
The 325d Steptronic was well-received by automotive critics for its blend of performance, fuel efficiency, and refinement. It offered a compelling alternative to gasoline-powered 3 Series models, particularly for drivers who prioritized fuel economy and low-speed torque. Compared to the more powerful 335d, the 325d was more affordable and offered slightly better fuel economy. However, it lacked the ultimate performance of its more potent sibling. Reliability was generally good, although like all modern diesel engines, the 325d could be susceptible to issues with the diesel particulate filter (DPF) and turbocharger if not properly maintained.
Legacy
The BMW E90 325d Steptronic remains a popular choice in the used car market today. Its robust engine, comfortable ride, and relatively good fuel economy make it an attractive option for buyers seeking a premium sedan. The M57D30TU2 engine is known for its longevity, provided it has been regularly serviced. However, potential buyers should be aware of the potential for DPF and turbocharger issues, and a thorough inspection is recommended before purchase. The E90 3 Series, in general, is considered a well-engineered and enjoyable car to drive, and the 325d Steptronic represents a particularly well-rounded and practical variant.
