The BMW 4 Series Gran Coupe (F36), specifically the 430i variant with the Steptronic automatic transmission, represents a compelling blend of practicality and performance within the BMW lineup. Introduced with the facelift in 2017 and continuing through the 2021 model year, this four-door coupe aimed to capture buyers seeking a more stylish alternative to traditional sedans, while still offering a usable rear seat and cargo area. Positioned as a mid-range offering within the 4 Series Gran Coupe family, the 430i provided a balance between the more accessible 420i and the higher-performance 440i models. It was primarily marketed towards buyers in North America, Europe, and Asia-Pacific regions who desired a premium, sporty vehicle with everyday usability.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Gran Coupe (F36, facelift 2017) |
| Type (Engine) | 430i (252 Hp) Steptronic |
| Start of production | 2017 |
| End of production | 2021 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 4 |
| 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 | 5.9 sec |
| Acceleration 0 – 62 mph | 5.9 sec |
| Acceleration 0 – 60 mph | 5.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6.1 kg/Hp, 163.6 Hp/tonne |
| Weight-to-torque ratio | 4.4 kg/Nm, 227.3 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 | 1540 kg (3395.12 lbs.) |
| Max. weight | 2100 kg (4629.71 lbs.) |
| Max load | 560 kg (1234.59 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Trunk (boot) space – maximum | 1300 l (45.91 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 | 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 | 1389 mm (54.69 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1545 mm (60.83 in.) |
| Rear (Back) track | 1592 mm (62.68 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 F36 4 Series Gran Coupe, launched in 2014, represented BMW’s attempt to capitalize on the growing demand for four-door coupes. The 2017 facelift brought with it revised styling, updated technology, and refinements to the engine lineup. The 430i, powered by the B48 2.0-liter turbocharged four-cylinder engine, served as a sweet spot in the range, offering a significant step up in performance from the base 420i while remaining more accessible than the range-topping 440i. The Steptronic automatic transmission, an 8-speed unit, was a popular choice, providing smooth and efficient gear changes. This combination aimed to deliver a refined and engaging driving experience for a broad spectrum of buyers.
Powertrain & Engine Architecture
At the heart of the 430i lies the BMW B48B20B 2.0-liter inline-four cylinder engine. This engine is a member of BMW’s modular engine family, known for its efficiency and performance. It utilizes direct fuel injection, a single 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. The Steptronic 8-speed automatic transmission is a torque-converter type, offering smooth shifts and adaptive learning capabilities. It features steering wheel-mounted paddle shifters for manual control, and various driving modes (Comfort, Sport, Eco Pro) to tailor the transmission’s behavior to the driver’s preferences.
Driving Characteristics
The 430i Steptronic delivers a refined and capable 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 0-60 mph sprint takes approximately 5.6 seconds, making it a genuinely quick vehicle. The Steptronic transmission contributes to this performance with its quick and precise shifts. In typical driving scenarios, the transmission is nearly imperceptible, providing smooth transitions between gears. The gear ratios are well-chosen, offering a balance between acceleration and fuel efficiency. Compared to the 6-speed manual transmission available on some 430i models, the Steptronic offers greater convenience and ease of use, particularly in urban traffic. However, some enthusiasts may find the manual transmission more engaging.
Equipment & Trim Levels
The 430i Gran Coupe came standard with a generous array 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 like 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 such as lane departure warning and adaptive cruise control. Trim levels varied depending on the market, but generally included options for upgraded interior trim materials, exterior styling packages, and wheel designs.
Chassis & Braking
The F36 4 Series Gran Coupe features a sophisticated chassis design. The front suspension utilizes independent coil springs and struts, while the rear suspension employs an independent multi-link setup. This configuration provides a comfortable ride quality while maintaining good handling characteristics. The 430i typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The steering system is a rack-and-pinion type with electric power assistance, offering precise and responsive steering feel. The standard tire size varied depending on the wheel size, ranging from 225/50 R17 to 255/35 R19.
Market Reception & Comparison
The 430i Gran Coupe was generally well-received by automotive critics. It was praised for its stylish design, comfortable interior, and engaging driving dynamics. The 2.0-liter turbo engine was considered a good compromise between performance and fuel economy. Compared to the 420i, the 430i offered a noticeable increase in power and acceleration. Compared to the 440i, it provided a more affordable entry point into the 4 Series Gran Coupe range, albeit with slightly less performance. Fuel economy figures were competitive within its segment, averaging around 42.8 mpg in combined driving. Reliability reports have been generally positive, with the B48 engine proving to be a robust and dependable unit.
Legacy
The F36 4 Series Gran Coupe, and specifically the 430i Steptronic variant, has established itself as a desirable used car option. The B48 engine has proven to be relatively reliable, and maintenance costs are reasonable. The combination of practicality, style, and performance continues to appeal to buyers seeking a premium four-door coupe. As a result, well-maintained examples of the 430i Gran Coupe hold their value relatively well in the used car market, making it a compelling choice for those looking for a sophisticated and enjoyable driving experience.
