The BMW 4 Series Coupe (F32), specifically the 430i xDrive Steptronic variant produced from 2017 to 2020, represents a mid-cycle refresh of the F32 generation. Introduced as part of the Life Cycle Impulse (LCI) update, this model aimed to refine the original 4 Series formula with updated styling, enhanced technology, and revised powertrain options. The 430i xDrive Steptronic occupied a sweet spot in the 4 Series lineup, offering a balance of performance, luxury, and all-weather capability, positioned above the 420i and below the more potent 440i models. It was primarily marketed towards buyers seeking a sporty coupe experience with the added security of BMW’s xDrive all-wheel-drive system and the convenience of an eight-speed automatic transmission.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Coupe (F32, facelift 2017) |
| Type (Engine) | 430i (252 Hp) xDrive Steptronic |
| Start of production | 2017 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 7.5-7.8 l/100 km (31.4 – 30.2 US mpg) |
| Fuel consumption (extra urban) | 5.0-5.2 l/100 km (47 – 45.2 US mpg) |
| Fuel consumption (combined) | 5.9-6.2 l/100 km (39.9 – 37.9 US mpg) |
| CO2 emissions | 138-144 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 | 6.3 kg/Hp, 160 Hp/tonne |
| Weight-to-torque ratio | 4.5 kg/Nm, 222.2 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 | 1575 kg (3472.28 lbs.) |
| Max. weight | 2095 kg (4618.68 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%) | 1700 kg (3747.86 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4640 mm (182.68 in.) |
| Width | 1825 mm (71.85 in.) |
| Height | 1392 mm (54.8 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1543 mm (60.75 in.) |
| Rear (Back) track | 1589 mm (62.56 in.) |
| Ride height (ground clearance) | 145 mm (5.71 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle (turning diameter) | 11.8 m (38.71 ft.) |
| Drive wheel | All wheel drive (4×4) |
| 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 |
Powertrain & Engine Architecture
The heart of the 430i xDrive Steptronic is BMW’s B48B20B 2.0-liter turbocharged inline-four engine. This engine is a member of BMW’s modular engine family, known for its efficiency and performance. It utilizes direct fuel injection, a twin-scroll turbocharger, and variable valve timing (VANOS) and valve lift (Valvetronic) technologies to optimize power delivery and fuel economy. The B48 engine produces 252 horsepower at 5200 rpm and 350 Nm (258 lb-ft) of torque between 1450 and 4800 rpm. This power is then sent to all four wheels via BMW’s xDrive all-wheel-drive system and an eight-speed Steptronic automatic transmission. The Steptronic transmission offers smooth and quick shifts, with the ability for the driver to manually select gears using paddle shifters or the gear selector.
Driving Characteristics
The 430i xDrive Steptronic delivers a refined and engaging driving experience. While not as overtly sporty as the 440i, the 2.0-liter turbo engine provides ample power for everyday driving and spirited acceleration. The xDrive system provides excellent traction in all weather conditions, enhancing stability and confidence. The eight-speed automatic transmission is well-tuned, offering seamless gear changes and contributing to the car’s overall smoothness. Compared to the six-speed manual transmission available on some 430i models, the Steptronic automatic prioritizes comfort and ease of use, though it may slightly diminish driver engagement. The gear ratios are optimized for both fuel efficiency and responsive acceleration, with a focus on providing strong mid-range torque.
Equipment & Trim Levels
The 430i xDrive Steptronic came standard with a comprehensive list of features, including leatherette upholstery, power-adjustable front seats, a BMW iDrive infotainment system with a 6.5-inch display screen, automatic climate control, and a suite of safety features such as ABS, stability control, and airbags. Optional extras included leather upholstery, a larger iDrive display screen, a premium sound system, a head-up display, and various driver-assistance systems like lane departure warning and adaptive cruise control. Trim levels were relatively straightforward, with options primarily revolving around adding individual packages and standalone options.
Chassis & Braking
The 4 Series Coupe features a sophisticated chassis design with an independent suspension at all four corners. The front suspension utilizes coil springs and struts, while the rear suspension employs a multi-link setup. This configuration provides a good balance of ride comfort and handling precision. The 430i xDrive Steptronic is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The electronic stability control system works in conjunction with the brakes to maintain control during emergency maneuvers.
Market Reception & Comparison
The 430i xDrive Steptronic was generally well-received by automotive critics. It was praised for its refined driving experience, comfortable interior, and available technology. Compared to the 420i, the 430i offered a noticeable performance upgrade, while remaining more affordable than the 440i. Fuel economy was also a strong point, with the 430i achieving respectable figures for a performance coupe. Reliability has been generally good, although some owners have reported minor issues with the infotainment system and electrical components.
Legacy
The BMW 430i xDrive Steptronic (F32) has established itself as a desirable used car option. The B48 engine has proven to be relatively reliable, and the xDrive system provides added peace of mind in inclement weather. The combination of performance, luxury, and practicality makes it a compelling choice for buyers seeking a sporty coupe that can be driven year-round. As with any used vehicle, proper maintenance records are crucial, but the 430i xDrive Steptronic remains a well-regarded and enjoyable driving machine.
