The BMW 3 Series Sedan (E90 LCI), specifically the 318i variant equipped with the 6-speed Steptronic automatic transmission, was produced from 2009 to 2012. This model represents a mid-cycle refresh (Life Cycle Impulse, or LCI in BMW terminology) of the E90 3 Series, which ran from 2005-2013. The 318i served as the entry point into the 3 Series range in many markets, offering a balance of BMW’s renowned driving dynamics with improved fuel efficiency and a more accessible price point. It occupied a crucial position in BMW’s lineup, appealing to buyers seeking a premium compact executive car without the higher costs associated with the more powerful 325i, 330i, or M3 models.
Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Sedan (E90 LCI, facelift 2008) |
| Type (Engine) | 318i (143 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) | 8.7 l/100 km (27 US mpg, 32.5 UK mpg, 11.5 km/l) |
| Fuel consumption (extra urban) | 5.4 l/100 km (43.6 US mpg, 52.3 UK mpg, 18.5 km/l) |
| Fuel consumption (combined) | 6.6 l/100 km (35.6 US mpg, 42.8 UK mpg, 15.2 km/l) |
| CO2 emissions | 155 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.9 sec |
| Acceleration 0 – 62 mph | 9.9 sec |
| Acceleration 0 – 60 mph | 9.4 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 9.7 kg/Hp, 102.9 Hp/tonne |
| Weight-to-torque ratio | 7.3 kg/Nm, 136.7 Nm/tonne |
| Power | 143 Hp @ 6000 rpm |
| Power per litre | 71.7 Hp/l |
| Torque | 190 Nm @ 4250 rpm (140.14 lb.-ft. @ 4250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N43B20A |
| Engine displacement | 1995 cm3 (121.74 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 12:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 4.25 l (4.49 US qt | 3.74 UK qt) |
| Coolant | 9.2 l (9.72 US qt | 8.09 UK qt) |
| Kerb Weight | 1390 kg (3064.43 lbs.) |
| Max. weight | 1910 kg (4210.83 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – minimum | 460 l (16.24 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1400 kg (3086.47 lbs.) |
| Permitted trailer load without brakes | 695 kg (1532.21 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 | 1506 mm (59.29 in.) |
| Rear (Back) track | 1535 mm (60.43 in.) |
| Ride height (ground clearance) | 144 mm (5.67 in.) |
| Drag coefficient (Cd) | 0.26 |
| Minimum turning circle (turning diameter) | 11.0 m (36.09 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | 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 | 205/55 R16 91H |
| Wheel rims size | 7J x 16 |
Powertrain & Engine Architecture
The 318i LCI utilized the N43B20A engine, a 2.0-liter naturally aspirated inline-four cylinder engine. This engine was a significant departure from the previous M43 and M54 engines, incorporating direct fuel injection, fully variable valve timing (Double-VANOS), and a magnesium alloy engine block to reduce weight. The N43 was known for its relatively smooth operation and improved fuel efficiency compared to its predecessors. The 6-speed Steptronic automatic transmission, a conventional torque-converter automatic, was paired with the N43B20A. This transmission offered both fully automatic operation and a manual shift mode, allowing drivers some control over gear selection. The transmission’s programming was geared towards comfort and fuel economy, with relatively smooth shifts and a focus on keeping the engine in its optimal operating range.
Driving Characteristics
The 318i Automatic offered a comfortable and refined driving experience. With 143 horsepower and 190 lb-ft of torque, acceleration was adequate for everyday driving, but not particularly sporty. The 0-60 mph time of around 9.4 seconds reflects this. Compared to the 325i or 330i models, the 318i felt noticeably slower, especially during overtaking maneuvers. The automatic transmission, while smooth, could sometimes feel hesitant to downshift, requiring a deliberate kickdown for quicker acceleration. The gear ratios were optimized for fuel efficiency, resulting in a slightly less engaging driving experience than the available manual transmission. However, the 318i still retained the BMW’s characteristic balanced handling and precise steering, making it enjoyable to drive on winding roads.
Equipment & Trim Levels
The 318i LCI typically came standard with features such as automatic climate control, power windows and locks, a multi-function steering wheel, and a basic audio system. Upholstery was usually cloth, although leatherette or full leather options were available. The LCI update brought revised interior trim pieces and updated infotainment options. Common optional extras included a sunroof, upgraded audio systems (including Harman Kardon), navigation, parking sensors, and sport seats. The trim level could vary depending on the market, but generally, the 318i was positioned as the entry-level model, with fewer standard features than the higher-trim 325i and 330i.
Chassis & Braking
The E90 3 Series featured a sophisticated chassis design with independent suspension at all four wheels. The 318i utilized coil springs in the front and a multi-link setup in the rear. Stabilizer bars were fitted front and rear to reduce body roll. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power for the car’s weight and performance. Anti-lock braking system (ABS) was standard, enhancing safety and control during emergency braking situations. The suspension tuning was generally comfort-oriented, providing a smooth ride over most road surfaces.
Market Reception & Comparison
The 318i LCI was generally well-received by automotive critics as a sensible and practical entry point into the 3 Series range. It was praised for its fuel efficiency, comfortable ride, and BMW’s trademark handling characteristics. However, some critics noted its relatively modest performance compared to the more powerful 3 Series models. Compared to the 325i, the 318i offered significantly lower running costs but lacked the same level of performance and refinement. The 320d (diesel) was another popular alternative, offering even better fuel economy and similar performance to the 318i.
Legacy
The N43B20A engine, while generally reliable, has been known to exhibit some issues over time, including oil leaks and occasional problems with the fuel injectors. The Steptronic automatic transmission is generally durable, but regular fluid changes are crucial for maintaining its longevity. Today, the 318i LCI represents an affordable entry point into BMW ownership. Well-maintained examples can still provide years of reliable service, offering a blend of comfort, practicality, and BMW’s renowned driving dynamics. Its relatively lower price point and fuel efficiency make it an attractive option for buyers seeking a premium compact executive car on a budget.
