The BMW 3 Series Sedan (E90 LCI), specifically the 330d variant with the Steptronic automatic transmission, represents a significant iteration of BMW’s iconic sports sedan. Produced from 2009 to 2012, this model was part of the E90’s Life Cycle Impulse (LCI) – a mid-life facelift bringing updated styling, improved efficiency, and enhanced technology. The 330d Steptronic occupied a middle-ground position within the 3 Series lineup, offering a compelling blend of performance, refinement, and fuel economy, appealing to buyers seeking a more efficient alternative to the gasoline-powered 335i while providing more power than the entry-level 320d.
Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Sedan (E90 LCI, facelift 2008) |
| Type (Engine) | 330d (245 Hp) Steptronic |
| Start of production | 2009 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 8 l/100 km (29.4 US mpg, 35.3 UK mpg, 12.5 km/l) |
| Fuel consumption (extra urban) | 5.2 l/100 km (45.2 US mpg, 54.3 UK mpg, 19.2 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 | 6.2 sec |
| Acceleration 0 – 62 mph | 6.2 sec |
| Acceleration 0 – 60 mph | 5.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 6.3 kg/Hp, 158.1 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 335.5 Nm/tonne |
| Power | 245 Hp @ 4000 rpm |
| Power per litre | 81.9 Hp/l |
| Torque | 520 Nm @ 1750-3000 rpm (383.53 lb.-ft. @ 1750-3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N57D30A |
| 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 | Turbocharger, Intercooler |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant | 7.9 l (8.35 US qt | 6.95 UK qt) |
| Kerb Weight | 1550 kg (3417.17 lbs.) |
| Max. weight | 2070 kg (4563.57 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 330d Steptronic is the N57D30A, a 3.0-liter inline-six diesel engine. This engine is a cornerstone of BMW’s diesel technology, known for its smooth operation and impressive torque output. The N57 featured a common-rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. A single variable geometry turbocharger (VGT) with intercooling further enhanced performance. The engine utilized four valves per cylinder and a robust cast iron block, contributing to its durability. The ‘D30A’ designation indicates a specific output level of 300 Nm/liter. The Steptronic transmission is a six-speed automatic, offering smooth shifts and a torque converter for enhanced drivability. It featured adaptive shift programs, adjusting to the driver’s style and road conditions.
Driving Characteristics
The 330d Steptronic delivered a distinctly different driving experience compared to its manual counterparts or higher-performance siblings like the 335i. While the six-speed automatic wasn’t as overtly sporty as the six-speed manual, it provided effortless cruising and responsive acceleration. The abundant 520 Nm of torque, available from just 1750 rpm, meant strong pull in any gear. The automatic transmission’s programming prioritized comfort and efficiency, resulting in slightly slower acceleration times (around 6.2 seconds 0-60 mph) than the manual version. However, the convenience and smoothness of the Steptronic were highly valued by many drivers. The gear ratios were tuned for a balance between fuel economy and performance, with a relatively tall final drive to maximize efficiency on the highway.
Equipment & Trim Levels
The 330d Steptronic typically came well-equipped, reflecting its position as a mid-range offering. Standard features included automatic climate control, power windows and mirrors, a multi-function steering wheel, and a BMW Professional radio system. Upholstery was generally cloth, though leather options were readily available. Common optional extras included a navigation system, upgraded audio systems (Harman Kardon), sport seats, sunroof, and parking sensors. The LCI facelift brought subtle interior revisions, including updated trim materials and improved iDrive functionality. Packages like the Sport Package added aesthetic enhancements like sport suspension, unique alloy wheels, and aluminum interior trim.
Chassis & Braking
The E90 3 Series featured a sophisticated chassis design. The 330d Steptronic utilized an independent suspension setup at both the front (coil springs) and rear (multi-link). This provided a good balance between ride comfort and handling precision. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) was standard, along with electronic brake-force distribution (EBD). The 330d’s weight (approximately 3417 lbs) was relatively well-distributed, contributing to balanced handling characteristics. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The 330d Steptronic was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and impressive fuel economy. Compared to the 320d, the 330d offered a significant performance upgrade, while remaining more affordable and fuel-efficient than the 335i. The automatic transmission was seen as a good match for the engine’s torque characteristics, making it a popular choice for drivers prioritizing ease of use. Some critics noted that the Steptronic wasn’t as engaging as the manual transmission, but acknowledged its practicality for everyday driving. Fuel economy figures of around 38 mpg combined were highly competitive for its class.
Legacy
The N57 engine family, including the N57D30A found in the 330d, has proven to be remarkably durable. With proper maintenance, these engines can reliably exceed 200,000 miles. The Steptronic transmission is also generally reliable, although regular fluid changes are crucial for longevity. On the used car market, the E90 330d Steptronic remains a popular choice for buyers seeking a well-rounded and efficient sports sedan. However, potential buyers should be aware of potential issues such as diesel particulate filter (DPF) clogging and injector wear, which are common to diesel engines of this era. Overall, the 330d Steptronic represents a sweet spot in the E90 3 Series lineup, offering a compelling blend of performance, refinement, and practicality.
