Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Coupe (E46, facelift 2003) |
| Type (Engine) | 325Ci (192 Hp) Steptronic |
| Start of production | 2003 |
| End of production | 2005 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 2 |
| Fuel consumption (urban) | 13.5 l/100 km (17.4 US mpg, 20.9 UK mpg, 7.4 km/l) |
| Fuel consumption (extra urban) | 7.2 l/100 km (32.7 US mpg, 39.2 UK mpg, 13.9 km/l) |
| Fuel consumption (combined) | 9.5 l/100 km (24.8 US mpg, 29.7 UK mpg, 10.5 km/l) |
| CO2 emissions | 236 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.4 sec |
| Acceleration 0 – 62 mph | 8.4 sec |
| Acceleration 0 – 60 mph | 8.0 sec (Calculated) |
| Maximum speed | 237 km/h (147.26 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.6 kg/Hp, 132 Hp/tonne |
| Weight-to-torque ratio | 5.9 kg/Nm, 168.4 Nm/tonne |
| Power | 192 Hp @ 6000 rpm |
| Power per litre | 77 Hp/l |
| Torque | 245 Nm @ 3500 rpm (180.7 lb.-ft. @ 3500 rpm) |
| Maximum engine speed | 6100 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M54B25TU |
| Engine displacement | 2494 cm3 (152.19 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 75 mm (2.95 in.) |
| Compression ratio | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant capacity | 8.4 l (8.88 US qt | 7.39 UK qt) |
| Kerb Weight | 1455 kg (3207.73 lbs.) |
| Max. weight | 1955 kg (4310.04 lbs.) |
| Max load | 500 kg (1102.31 lbs.) |
| Trunk (boot) space (minimum) | 410 l (14.48 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Length | 4455 mm (175.39 in.) |
| Width | 1757 mm (69.17 in.) |
| Width including mirrors | 1947 mm (76.65 in.) |
| Height | 1369 mm (53.9 in.) |
| Wheelbase | 2725 mm (107.28 in.) |
| Front track | 1471 mm (57.91 in.) |
| Rear track | 1483 mm (58.39 in.) |
| Drag coefficient (Cd) | 0.32 |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 5 gears, automatic transmission |
| Front suspension | Independent type McPherson |
| Rear suspension | Wishbone, Trailing arm, Coil spring |
| Front brakes | Ventilated discs, 300 mm |
| Rear brakes | Ventilated discs, 294 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 205/55 R16 |
| Wheel rims size | 7J x 16 |
The E46 325Ci Steptronic, launched in 2003 as part of the facelifted E46 range, built upon the success of its predecessor. The facelift, often referred to as the “Ci” update, brought revised styling cues, including redesigned headlights and taillights, along with subtle interior enhancements. The 325Ci occupied a middle ground in the coupe lineup, slotting between the more affordable 323Ci and the performance-oriented 330Ci. It was designed to appeal to buyers who desired a sporty and refined coupe experience without the higher price tag or more aggressive character of the top-tier model. The “Steptronic” designation indicated the inclusion of BMW’s five-speed automatic transmission, offering a convenient alternative to the standard six-speed manual.
Powertrain & Engine Architecture
At the heart of the 325Ci Steptronic lies the M54B25TU inline-six engine. This 2.5-liter naturally aspirated engine, a hallmark of BMW’s engineering prowess, produced 192 horsepower at 6000 rpm and 245 Nm (180.7 lb-ft) of torque at 3500 rpm. The M54 engine featured double overhead camshafts (DOHC), four valves per cylinder, and a multi-port fuel injection system. The ‘TU’ designation signifies “Technische Upgrade” (Technical Upgrade), indicating improvements over the earlier M54 versions. These upgrades included refinements to the engine management system and valve timing. The Steptronic transmission is a five-speed automatic with adaptive shift programming, designed to adjust shift points based on driving style. It also featured a manual shift mode, allowing drivers some control over gear selection.
Driving Characteristics
The 325Ci Steptronic offered a comfortable and refined driving experience. While not as overtly sporty as the manual transmission or 330Ci variants, the automatic transmission provided smooth and effortless gear changes. Acceleration from 0 to 60 mph took approximately 8.0 seconds, and the car could reach a top speed of 147.26 mph. The automatic transmission’s gear ratios were tuned for a balance of fuel efficiency and responsiveness. Compared to the manual version, the Steptronic felt slightly less engaging, but it excelled in everyday driving situations, particularly in city traffic. The engine delivered a linear power delivery, making it easy to modulate throttle inputs and maintain control.
Equipment & Trim Levels
The 325Ci Steptronic came standard with a respectable array of features. Interior appointments included cloth upholstery, power-adjustable front seats, and a multi-function steering wheel. Standard equipment also included automatic climate control, a CD stereo system, and power windows and locks. Optional extras were plentiful, allowing buyers to customize their vehicles. Popular options included leather upholstery, a sunroof, premium sound system, and BMW’s navigation system. Sport packages added features like sport seats, a sport suspension, and unique exterior styling elements.
Chassis & Braking
The E46 325Ci utilized a MacPherson strut front suspension and a multi-link rear suspension, providing a well-balanced and controlled ride. The chassis was designed to minimize body roll and maximize grip. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power. The inclusion of ABS (Anti-lock Braking System) further enhanced safety. The 325Ci’s suspension tuning was geared towards comfort and stability, rather than outright track performance. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The 325Ci Steptronic was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and well-appointed interior. However, some reviewers noted that the automatic transmission detracted slightly from the overall driving experience compared to the manual version. Compared to the 323Ci, the 325Ci offered a noticeable performance upgrade. The 330Ci, with its larger engine, provided significantly more power and a more aggressive driving experience, but at a higher price point. Fuel economy was respectable for a performance coupe, averaging around 24.8 US mpg in combined driving.
Legacy
The E46 325Ci Steptronic has proven to be a relatively reliable vehicle, with the M54 engine being known for its durability. Common maintenance items include oil changes, coolant flushes, and occasional repairs to cooling system components. The Steptronic transmission, while generally reliable, can require servicing over time. Today, the E46 325Ci remains a popular choice among enthusiasts and collectors. Its combination of sporty styling, refined driving dynamics, and relative affordability makes it an attractive option in the used car market. Well-maintained examples are increasingly sought after, representing a classic era of BMW engineering.
