The BMW 4 Series Coupe (F32) 430i Steptronic, produced primarily during the 2016 model year, represents a compelling blend of performance and luxury within the F32 generation of the 4 Series. Positioned as a mid-range offering, it slotted between the entry-level 420i and the higher-performance 440i models. This variant aimed to deliver a refined driving experience with a balance of power and efficiency, appealing to buyers seeking a sporty coupe without the outright aggression of the top-tier trims. The F32 4 Series, launched in 2013, was BMW’s replacement for the 3 Series Coupe, establishing a distinct identity for the two-door model line.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Coupe (F32) |
| Type (Engine) | 430i (252 Hp) Steptronic |
| Start of production | 2016 |
| End of production | 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 7.0-7.4 l/100 km (33.6 – 31.8 US mpg, 40.4 – 38.2 UK mpg, 14.3 – 13.5 km/l) |
| Fuel consumption (extra urban) | 4.7-4.9 l/100 km (50 – 48 US mpg, 60.1 – 57.6 UK mpg, 21.3 – 20.4 km/l) |
| Fuel consumption (combined) | 5.5-5.8 l/100 km (42.8 – 40.6 US mpg, 51.4 – 48.7 UK mpg, 18.2 – 17.2 km/l) |
| CO2 emissions | 129-136 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.8 sec |
| Acceleration 0 – 62 mph | 5.8 sec |
| Acceleration 0 – 60 mph | 5.5 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6 kg/Hp, 166.9 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 231.8 Nm/tonne |
| Power | 252 Hp @ 5200 rpm |
| Power per litre | 126.1 Hp/l |
| Torque | 350 Nm @ 1450-4800 rpm (258.15 lb.-ft. @ 1450-4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B48B20B |
| Engine displacement | 1998 cm3 (121.93 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 5.3 l (5.6 US qt | 4.66 UK qt) |
| Coolant | 7.8 l (8.24 US qt | 6.86 UK qt) |
| Kerb Weight | 1510 kg (3328.98 lbs.) |
| Max. weight | 2030 kg (4475.38 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – minimum | 445 l (15.72 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1600 kg (3527.4 lbs.) |
| Permitted trailer load without brakes | 745 kg (1642.44 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4638 mm (182.6 in.) |
| Width | 1825 mm (71.85 in.) |
| Height | 1377 mm (54.21 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1545 mm (60.83 in.) |
| Rear (Back) track | 1594 mm (62.76 in.) |
| Ride height (ground clearance) | 130 mm (5.12 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle (turning diameter) | 11.3 m (37.07 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 | 8 gears, automatic transmission Steptronic |
| 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 | 225/50 R17 94W; 225/45 R18; 255/40 R18; 225/40 R19; 255/35 R19 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 18; 8J x 19; 8.5J x 19 |
Powertrain & Engine Architecture
The 430i Steptronic is powered by BMW’s B48B20B 2.0-liter inline-four cylinder engine. This engine is a member of BMW’s modular engine family, utilizing a single-scroll, twin-scroll turbocharger with an intercooler to deliver 252 horsepower at 5200 rpm and 350 Nm (258 lb-ft) of torque between 1450 and 4800 rpm. The B48 engine features direct fuel injection, operating at a compression ratio of 10.2:1. The engine’s Valvetronic technology allows for precise control of valve lift, optimizing both power and efficiency. The “Steptronic” designation refers to BMW’s 8-speed automatic transmission, known for its smooth shifts and adaptive learning capabilities. This transmission is designed to optimize fuel economy and provide responsive acceleration.
Driving Characteristics
The 430i Steptronic offers a balanced driving experience. While not as aggressively sporty as the 440i, the 2.0-liter turbo engine provides ample power for everyday driving and spirited acceleration. The 8-speed automatic transmission contributes to a smooth and refined ride, with quick and precise gear changes. The 0-60 mph time of approximately 5.5 seconds is respectable for a coupe in this class. Compared to the 420i, the 430i offers a noticeable increase in performance, while the 440i, with its larger inline-six engine, provides a more substantial performance upgrade. The automatic transmission, while convenient, may not offer the same level of driver engagement as the available manual transmission.
Equipment & Trim Levels
The 430i Steptronic came standard with a comprehensive list of features, including leatherette upholstery, automatic climate control, a BMW iDrive infotainment system with a 6.5-inch display screen, and a suite of safety features like ABS, stability control, and airbags. Optional extras included leather upholstery, a premium sound system, navigation, a sunroof, and various driver-assistance systems. Interior trim options allowed for customization, with choices ranging from wood veneers to aluminum accents. The standard dashboard configuration featured a driver-focused layout with clear instrumentation and intuitive controls.
Chassis & Braking
The F32 430i utilizes a sophisticated chassis design featuring an independent coil spring front suspension and an independent multi-link rear suspension. This setup provides a comfortable ride while maintaining precise handling characteristics. The 430i is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The standard steering system is an electric power-assisted rack-and-pinion setup, offering precise and responsive steering feel. Stabilizer bars are fitted to both the front and rear axles to minimize body roll during cornering.
Market Reception & Comparison
The 430i Steptronic was generally well-received by automotive critics, who praised its blend of performance, luxury, and efficiency. It was considered a strong contender in the entry-level luxury coupe segment. Compared to its siblings, the 430i offered a sweet spot in terms of price and performance. The 420i was seen as somewhat underpowered, while the 440i carried a higher price tag. Fuel economy was a strong point for the 430i, with combined fuel consumption figures ranging from 5.5 to 5.8 l/100 km (42.8 – 40.6 US mpg). Reliability reports suggest that the B48 engine is generally reliable, although some owners have reported issues with oil leaks and cooling system components.
Legacy
The BMW 430i Steptronic (F32) remains a popular choice in the used car market. Its combination of sporty styling, refined driving dynamics, and relatively good fuel economy continues to appeal to buyers. The B48 engine has proven to be a durable and capable powerplant, although regular maintenance is essential to prevent potential issues. The F32 generation 4 Series, including the 430i, helped solidify BMW’s position as a leader in the luxury coupe segment, offering a compelling alternative to rivals from Audi and Mercedes-Benz.
