The BMW 3 Series (E46) facelift 325i Steptronic, produced from 2001 to 2005, represents a significant iteration of BMW’s popular compact executive car. This variant, equipped with the M54B25 engine and a five-speed automatic transmission marketed as “Steptronic,” occupied a middle ground within the E46 lineup, offering a balance between performance and convenience. It was positioned above the base 323i and below the more potent 330i, appealing to buyers seeking a refined driving experience without the higher price tag or sport-focused characteristics of its siblings. The facelift, introduced in 2001, brought cosmetic and mechanical updates to the E46, including revised styling, improved interior materials, and enhancements to the engine and suspension.
Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Sedan (E46, facelift 2001) |
| Type (Engine) | 325i (192 Hp) Steptronic |
| Start of production | 2001 |
| End of production | 2005 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| 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) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.3 sec |
| Acceleration 0 – 62 mph | 8.3 sec |
| Acceleration 0 – 60 mph | 7.9 sec |
| Maximum speed | 237 km/h (147.26 mph) |
| Weight-to-power ratio | 7.3 kg/Hp, 136.2 Hp/tonne |
| Weight-to-torque ratio | 5.8 kg/Nm, 173.8 Nm/tonne |
| Power | 192 Hp @ 5900 rpm |
| Power per litre | 77 Hp/l |
| Torque | 245 Nm @ 4200 rpm (180.7 lb.-ft. @ 4200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M54B25 |
| 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 | 10.5:1 |
| 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 | 8.4 l (8.88 US qt | 7.39 UK qt) |
| Kerb Weight | 1410 kg (3108.52 lbs.) |
| Max. weight | 1910 kg (4210.83 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) |
| Length | 4470 mm (175.98 in.) |
| Width | 1740 mm (68.5 in.) |
| Height | 1420 mm (55.91 in.) |
| Wheelbase | 2725 mm (107.28 in.) |
| Front track | 1480 mm (58.27 in.) |
| Rear (Back) track | 1495 mm (58.86 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 5 gears, automatic transmission |
| Front suspension | Spring Strut |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 195/65 R15 |
| Wheel rims size | 6.5J x 15 |
Powertrain & Engine Architecture
The heart of the 325i Steptronic is the M54B25, a 2.5-liter inline-six engine. This engine is a naturally aspirated powerplant featuring double overhead camshafts (DOHC) and four valves per cylinder. It utilizes a multi-port fuel injection system, delivering fuel directly into the intake ports. The M54 engine family was known for its smooth power delivery and relatively high reliability. The 192 horsepower output at 5900 rpm and 245 Nm (180.7 lb-ft) of torque at 4200 rpm provided adequate performance for everyday driving. The “Steptronic” transmission is a five-speed automatic gearbox with a manual shift mode, allowing drivers some control over gear selection. This transmission was designed to provide smooth and comfortable shifts, prioritizing ease of use over outright performance.
Driving Characteristics
The 325i Steptronic offered a comfortable and refined driving experience. While not as sporty as the manual transmission or 330i variants, the automatic transmission provided seamless gear changes, making it well-suited for city driving and long highway journeys. The automatic transmission’s programming prioritized fuel efficiency and smooth operation, resulting in slightly slower acceleration compared to the six-speed manual. The gear ratios were tuned for a balance of acceleration and cruising comfort. The M54 engine delivered a linear power curve, making it predictable and easy to modulate. However, drivers seeking a more engaging experience might find the automatic transmission somewhat detached.
Equipment & Trim Levels
The 325i Steptronic typically came standard with features such as air conditioning, power windows and locks, a CD player, and alloy wheels. Leatherette upholstery was common, with full leather available as an option. Optional extras included a sunroof, heated front seats, a premium sound system, and navigation. The interior design was functional and well-built, reflecting BMW’s commitment to quality. The facelifted E46 featured updated interior trim and improved materials compared to pre-facelift models.
Chassis & Braking
The E46 325i Steptronic utilized a MacPherson strut front suspension and a multi-link rear suspension, providing a good balance of ride comfort and handling. The chassis was relatively lightweight, contributing to the car’s agility. The braking system consisted of ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock Braking System (ABS) was standard. The suspension tuning was geared towards comfort, resulting in a slightly softer ride compared to the sportier 330i.
Market Reception & Comparison
The 325i Steptronic was generally well-received by automotive critics. It was praised for its comfortable ride, refined engine, and user-friendly automatic transmission. However, some reviewers noted that the automatic transmission detracted from the overall driving experience compared to the manual. Compared to the 323i, the 325i offered a noticeable performance upgrade. In contrast to the 330i, the 325i was more affordable and fuel-efficient, making it a more practical choice for some buyers. Fuel economy figures were respectable for its class, averaging around 24.8 US mpg in combined driving.
Legacy
The E46 325i Steptronic has proven to be a relatively reliable vehicle, with the M54 engine being particularly durable. Common maintenance items include oil changes, coolant flushes, and occasional repairs to the cooling system. The automatic transmission, if properly maintained, can provide years of trouble-free service. Today, the E46 325i Steptronic remains a popular choice in the used car market, offering a blend of BMW performance, comfort, and affordability. Its classic styling and relatively simple mechanicals make it an appealing option for enthusiasts and everyday drivers alike. While not the most sought-after E46 variant, the 325i Steptronic represents a well-rounded and enjoyable driving experience.
