The BMW 4 Series Coupe (F32), specifically the 430i variant with the Steptronic automatic transmission, represents a key iteration of BMW’s entry-level coupe offering during the 2017-2020 model years. Introduced as part of the F32’s facelift, this model aimed to balance performance, efficiency, and luxury within the 4 Series lineup. It occupied a middle ground, offering a step up from the 420i while remaining more accessible than the higher-performance 440i. The 430i was designed to appeal to buyers seeking a sporty driving experience with the convenience of an automatic transmission and a refined interior.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Coupe (F32, facelift 2017) |
| Type (Engine) | 430i (252 Hp) Steptronic |
| Start of production | 2017 |
| End of production | 2020 |
| 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 |
| 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 | 5.25 l (5.55 US qt | 4.62 UK qt) |
| Coolant | 8.1 l (8.56 US qt | 7.13 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 | 4640 mm (182.68 in.) |
| Width | 1825 mm (71.85 in.) |
| Height | 1377 mm (54.21 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1547 mm (60.91 in.) |
| Rear (Back) track | 1593 mm (62.72 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; 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 |
INTRODUCTION
The BMW 430i Coupe (F32) with the Steptronic transmission, produced from 2017 to 2020, is a rear-wheel-drive luxury coupe powered by a 2.0-liter turbocharged four-cylinder engine. This model represents a significant update to the F32 generation, incorporating styling revisions, updated technology, and refined engine options. It was positioned as a more accessible entry point into the 4 Series range, offering a blend of sporty handling and everyday usability. The facelift brought subtle but noticeable changes to the exterior, including revised headlights and taillights, along with interior enhancements focused on improving the overall driving experience.
Powertrain & Engine Architecture
At the heart of the 430i lies the BMW B48B20B 2.0-liter inline-four cylinder engine. This engine utilizes direct fuel injection and a single twin-scroll turbocharger, delivering 252 horsepower at 5200 rpm and 350 Nm (258 lb-ft) of torque between 1450 and 4800 rpm. The B48 engine is known for its responsiveness and efficiency, benefiting from BMW’s Valvetronic technology for precise control of valve timing and lift. The Steptronic transmission is an 8-speed automatic gearbox, offering smooth and quick shifts. It features adaptive learning, adjusting shift points based on driving style. This transmission is designed to optimize fuel economy and provide a comfortable driving experience, while still allowing for manual gear selection via steering wheel-mounted paddles or the gear selector.
Driving Characteristics
The 430i Steptronic delivers a refined and engaging driving experience. While not as overtly sporty as the 440i, it provides ample power for everyday driving and spirited excursions. The 8-speed automatic transmission contributes to smooth acceleration, and the engine’s broad torque curve ensures responsive performance in various driving situations. Compared to the 6-speed manual transmission available on some 430i models, the Steptronic offers greater convenience and ease of use, particularly in urban environments. However, some enthusiasts may find the manual transmission more engaging. The rear-wheel-drive configuration provides a balanced chassis and predictable handling, making it enjoyable on winding roads. The steering is precise and well-weighted, offering good feedback to the driver.
Equipment & Trim Levels
The 430i Coupe came standard with a comprehensive list of features, including leatherette upholstery, automatic climate control, a 6.5-inch iDrive infotainment system, and a suite of safety technologies like BMW’s Active Driving Assistance. Optional extras included leather upholstery, a larger 8.8-inch iDrive screen with navigation, a Harman Kardon premium sound system, and various driver-assistance features such as adaptive cruise control and lane departure warning. Trim levels varied depending on the market, but generally included options for sportier styling packages, upgraded interior materials, and additional comfort features. The interior design focused on a driver-centric layout, with intuitive controls and a high-quality finish.
Chassis & Braking
The 430i Coupe features a sophisticated chassis designed to deliver a balance of comfort and handling. The front suspension utilizes independent coil springs, while the rear suspension employs an independent multi-link setup. This configuration provides excellent ride quality and precise control. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) is standard, along with electronic stability control and traction control. The chassis is relatively lightweight, contributing to the car’s agile handling characteristics. The standard tire sizes range from 225/50 R17 to 255/35 R19, depending on the chosen wheel size and trim level.
Market Reception & Comparison
The 430i Coupe was generally well-received by automotive critics, who praised its refined engine, comfortable ride, and stylish design. It was often compared to its rivals, such as the Audi A5 Coupe and the Mercedes-Benz C-Class Coupe. The 430i offered a compelling combination of performance and value, making it a popular choice among buyers seeking a luxury coupe. Fuel economy was considered to be good for its class, with combined figures ranging from 5.5 to 5.8 l/100 km. Reliability was generally good, although some owners reported minor issues with the infotainment system. Compared to the 420i, the 430i offered a significant performance upgrade, while the 440i provided even more power and a sportier driving experience.
Legacy
The BMW 430i Coupe (F32) with the Steptronic transmission has established itself as a reliable and enjoyable luxury coupe in the used car market. The B48 engine has proven to be durable and relatively maintenance-free, and the Steptronic transmission is known for its smooth operation. These cars continue to be sought after by enthusiasts and buyers looking for a stylish and well-equipped coupe. While newer generations of the 4 Series have been introduced, the F32 remains a popular choice due to its affordability and proven track record. Regular maintenance, including oil changes and fluid checks, is essential to ensure the long-term reliability of this vehicle.
