The BMW 4 Series Coupe (F32), specifically the 430d variant with the Steptronic automatic transmission, was produced from 2017 to 2020 as part of the F32 lifecycle facelift. This model occupied a mid-range position within the 4 Series lineup, offering a balance between performance, fuel efficiency, and luxury. It represented BMW’s continued refinement of the coupe segment, targeting buyers seeking a sporty yet practical grand tourer. The 430d aimed to provide a more economical alternative to the gasoline-powered 430i and 440i models, while still delivering a compelling driving experience.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Coupe (F32, facelift 2017) |
| Type (Engine) | 430d (258 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) | 5.7-5.9 l/100 km (41.3 – 39.9 US mpg, 49.6 – 47.9 UK mpg, 17.5 – 16.9 km/l) |
| Fuel consumption (extra urban) | 4.5-4.6 l/100 km (52.3 – 51.1 US mpg, 62.8 – 61.4 UK mpg, 22.2 – 21.7 km/l) |
| Fuel consumption (combined) | 4.9-5.1 l/100 km (48 – 46.1 US mpg, 57.6 – 55.4 UK mpg, 20.4 – 19.6 km/l) |
| CO2 emissions | 129-134 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.5 sec |
| Acceleration 0 – 62 mph | 5.5 sec |
| Acceleration 0 – 60 mph | 5.2 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6 kg/Hp, 167.5 Hp/tonne |
| Weight-to-torque ratio | 2.8 kg/Nm, 363.6 Nm/tonne |
| Power | 258 Hp @ 4000 rpm |
| Torque | 560 Nm @ 1500-3000 rpm (413.03 lb.-ft. @ 1500-3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N57D30A |
| Engine displacement | 2993 cm3 (182.64 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 7.2 l (7.61 US qt | 6.34 UK qt) |
| Kerb Weight | 1540 kg (3395.12 lbs.) |
| Max. weight | 2060 kg (4541.52 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – minimum | 445 l (15.72 cu. ft.) |
| Fuel tank capacity | 57 l (15.06 US gal | 12.54 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 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 | 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 |
Powertrain & Engine Architecture
The heart of the 430d Steptronic is BMW’s N57D30A 3.0-liter inline-six diesel engine. This engine is a highly refined unit, known for its smooth operation and strong torque output. The N57 family of engines utilizes a common-rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The 430d benefits from a twin-turbocharger setup – a smaller turbo for quick response at low engine speeds and a larger turbo for sustained power at higher RPMs. An intercooler further enhances performance by cooling the compressed intake air. The engine produces 258 horsepower at 4,000 rpm and a substantial 560 Nm (413 lb-ft) of torque between 1,500 and 3,000 rpm. This broad torque curve contributes to effortless acceleration and strong in-gear performance.
The “Steptronic” transmission is BMW’s name for its 8-speed automatic gearbox. This transmission is renowned for its smooth and quick shifts, contributing to both performance and fuel efficiency. Drivers can choose to operate the transmission in automatic mode or manually select gears using steering wheel-mounted paddles or the gear selector lever. The transmission is programmed to adapt to the driver’s style and road conditions, optimizing shift points for the best balance of performance and economy.
Driving Characteristics
The 430d Steptronic delivers a refined and comfortable driving experience. The abundant torque from the diesel engine provides strong acceleration from low speeds, making it well-suited for everyday driving and highway cruising. While not as overtly sporty as the gasoline-powered 440i, the 430d offers ample power for spirited driving. The 8-speed automatic transmission contributes to smooth and seamless gear changes, enhancing the overall driving experience. The rear-wheel-drive configuration provides a balanced feel, although traction can be limited in slippery conditions. Compared to a manual transmission equipped 430d, the Steptronic version prioritizes ease of use and comfort over outright driver engagement.
Equipment & Trim Levels
The 430d Steptronic typically came well-equipped as standard. Common features included leather upholstery, automatic climate control, a BMW iDrive infotainment system with a central display screen, and a suite of safety features such as ABS, stability control, and multiple airbags. Optional extras included features like a premium sound system, navigation, heated seats, a sunroof, and adaptive suspension. Trim levels could vary slightly depending on the market, but generally, the 430d sat in the middle of the 4 Series range, offering a good balance of features and price.
Chassis & Braking
The 4 Series Coupe features a sophisticated chassis design. The front suspension utilizes independent coil springs, while the rear suspension employs an independent multi-link setup. This configuration provides a comfortable ride and precise handling. The 430d typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The steering system is a rack-and-pinion setup with electric power assistance, offering a responsive and precise feel.
Market Reception & Comparison
The 430d Steptronic was generally well-received by automotive critics. It was praised for its fuel efficiency, strong torque output, and refined driving experience. Compared to the 430i, the 430d offered significantly better fuel economy, making it a more practical choice for drivers who cover long distances. However, the 430i was often preferred by those seeking a more engaging and sporty driving experience. The 430d also offered a more affordable alternative to the higher-performance 440i model.
Legacy
The N57 engine family, including the N57D30A found in the 430d, has proven to be remarkably reliable. While diesel engines can be susceptible to issues with the particulate filter and fuel injection system, the N57 is generally considered a robust and durable engine. On the used car market, the 430d Steptronic represents a compelling value proposition, offering a blend of performance, luxury, and fuel efficiency. Maintenance costs are generally reasonable, and parts availability is good. However, potential buyers should ensure that the vehicle has been properly maintained and that the diesel particulate filter is functioning correctly.
