The BMW 3 Series Coupe (E92 LCI), specifically the 325d variant with the Steptronic automatic transmission, was produced from 2010 to 2013. This model represents a facelift of the E92 generation, designated as the “LCI” (Life Cycle Impulse) by BMW, bringing styling updates and revised engine options. The 325d Steptronic occupied a middle ground within the 3 Series Coupe lineup, offering a balance between performance, fuel efficiency, and comfort. It served as a popular choice for buyers seeking a sporty coupe experience with the convenience of an automatic transmission and the economy of a diesel engine, primarily in the European market.
Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Coupe (E92 LCI, facelift 2010) |
| Type (Engine) | 325d (204 Hp) Steptronic |
| Start of production | 2010 |
| End of production | 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 7.9 l/100 km (29.8 US mpg, 35.8 UK mpg, 12.7 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) | 6.1 l/100 km (38.6 US mpg, 46.3 UK mpg, 16.4 km/l) |
| CO2 emissions | 160 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.1 sec |
| Acceleration 0 – 62 mph | 7.1 sec |
| Acceleration 0 – 60 mph | 6.7 sec |
| Maximum speed | 242 km/h (150.37 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 7.5 kg/Hp, 133.8 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 282 Nm/tonne |
| Power | 204 Hp @ 3750 rpm |
| Torque | 430 Nm @ 1750 rpm (317.15 lb.-ft. @ 1750 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 | 8.2 l (8.66 US qt | 7.21 UK qt) |
| Kerb Weight | 1525 kg (3362.05 lbs.) |
| Max. weight | 2005 kg (4420.27 lbs.) |
| Max load | 480 kg (1058.22 lbs.) |
| Trunk (boot) space – minimum | 440 l (15.54 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 | 4612 mm (181.57 in.) |
| Width | 1782 mm (70.16 in.) |
| Width including mirrors | 1961 mm (77.2 in.) |
| Height | 1395 mm (54.92 in.) |
| Wheelbase | 2760 mm (108.66 in.) |
| Front track | 1500 mm (59.06 in.) |
| Rear (Back) track | 1513 mm (59.57 in.) |
| Ride height (ground clearance) | 143 mm (5.63 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 N57D30A, a 3.0-liter inline-six diesel engine. This engine is a cornerstone of BMW’s diesel offerings from the late 2000s and early 2010s, known for its refinement and efficiency. The N57 features common-rail direct injection, delivering fuel at extremely high pressure for optimized combustion. A single variable geometry turbocharger (VGT) with intercooling provides forced induction, contributing to the engine’s 204 horsepower at 3750 rpm and 430 Nm (317 lb-ft) of torque at a low 1750 rpm. The engine also incorporates four valves per cylinder and a sophisticated engine management system. The “Steptronic” transmission is a 6-speed automatic gearbox, offering smooth shifts and a torque converter for enhanced drivability. This transmission was programmed for a balance of fuel economy and responsiveness, with options for manual gear selection.
Driving Characteristics
The 325d Steptronic delivers a comfortable and refined driving experience. While not as overtly sporty as the 335i or the manual versions of the 325d, it provides ample power for everyday driving and confident highway cruising. The automatic transmission contributes to a relaxed driving style, particularly in urban environments. Acceleration from 0-60 mph takes approximately 6.7 seconds, making it a reasonably quick coupe. The torque-rich diesel engine provides strong pull from low engine speeds, making overtaking maneuvers easy. The automatic transmission’s gear ratios are tuned for efficiency, but can sometimes feel slightly hesitant during quick downshifts. Compared to the manual 325d, the Steptronic sacrifices some driver engagement but gains in convenience.
Equipment & Trim Levels
The 325d Steptronic typically came equipped with a generous array of standard features. These included leather upholstery, automatic climate control, a multi-function steering wheel, and a BMW Professional radio system. Optional extras were plentiful, including navigation, upgraded sound systems (Harman Kardon), sport seats, sunroof, and parking sensors. The LCI facelift brought subtle interior revisions, including updated trim materials and improved infotainment options. The 325d Steptronic was often positioned as a mid-range offering, bridging the gap between the more basic 320d and the higher-performance 335i.
Chassis & Braking
The E92 3 Series Coupe features a sophisticated chassis design. The front suspension utilizes independent coil springs, while the rear employs an independent multi-link setup. This configuration provides a good balance of ride comfort and handling precision. The 325d Steptronic typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) is standard, enhancing safety and stability. The steering is a rack-and-pinion system with electric power assistance, offering precise and responsive control.
Market Reception & Comparison
The 325d Steptronic was well-received by automotive critics, who praised its fuel efficiency, refined engine, and comfortable ride. It was often seen as a sensible choice for buyers prioritizing practicality and economy without sacrificing the BMW driving experience. Compared to the 320d, the 325d offered a noticeable performance upgrade. In contrast to the 335i, it provided a more affordable entry point into the 3 Series Coupe range, albeit with less outright power. Fuel economy was a key strength, with combined figures around 38.6 US mpg. Reliability was generally good, although, like all modern diesel engines, the 325d could be susceptible to issues with the diesel particulate filter (DPF) if not properly maintained.
Legacy
The N57D30A engine has proven to be a durable and reliable powerplant when properly maintained. The 325d Steptronic remains a popular choice in the used car market, offering a compelling combination of performance, economy, and comfort. However, potential buyers should be aware of the potential for DPF issues and the importance of regular servicing. The E92 3 Series Coupe, in general, is considered a stylish and well-engineered vehicle, and the 325d Steptronic represents a particularly well-rounded option within the range.
