The BMW 4 Series Coupe (G22) 430i Steptronic, produced from 2020 through January 2024, represents a compelling blend of performance and luxury within the broader G22 4 Series lineup. Positioned as a mid-range offering, it served as a step up from the 420i while providing a more accessible entry point into the 4 Series range compared to the higher-performance M440i. Built on the BMW Cluster Architecture (CLAR) platform, the G22 aimed to deliver a more refined driving experience and modern technology package than its F32 predecessor. This variant specifically combines a 2.0-liter turbocharged inline-four engine with BMW’s 8-speed Steptronic automatic transmission and rear-wheel drive.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Coupe (G22) |
| Type (Engine) | 430i (258 Hp) Steptronic |
| Start of production | 2020 |
| End of production | January, 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Combined fuel consumption (WLTP) | 6.6-7.4 l/100 km (35.6 – 31.8 US mpg, 42.8 – 38.2 UK mpg, 15.2 – 13.5 km/l) |
| CO2 emissions (WLTP) | 150-168 g/km |
| Fuel consumption (economy) – urban (NEDC) | 7.3-7.7 l/100 km (32.2 – 30.5 US mpg, 38.7 – 36.7 UK mpg, 13.7 – 13 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 4.8-5.3 l/100 km (49 – 44.4 US mpg, 58.9 – 53.3 UK mpg, 20.8 – 18.9 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 5.7-6.1 l/100 km (41.3 – 38.6 US mpg, 49.6 – 46.3 UK mpg, 17.5 – 16.4 km/l) |
| CO2 emissions (NEDC) | 131-141 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 6d |
| Weight-to-power ratio | 6 kg/Hp, 167 Hp/tonne |
| Weight-to-torque ratio | 3.9 kg/Nm, 258.9 Nm/tonne |
| Power | 258 Hp @ 5000-6500 rpm |
| Power per litre | 129.1 Hp/l |
| Torque | 400 Nm @ 1550-4400 rpm (295.02 lb.-ft. @ 1550-4400 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 |
| Valvetrain | VALVETRONIC |
| Engine oil capacity | 5.25 l (5.55 US qt | 4.62 UK qt) |
| Coolant | 9.8 l (10.36 US qt | 8.62 UK qt) |
| Kerb Weight | 1545 kg (3406.14 lbs.) |
| Max. weight | 2030 kg (4475.38 lbs.) |
| Max load | 485 kg (1069.24 lbs.) |
| Trunk (boot) space – minimum | 440 l (15.54 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 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 | 4768 mm (187.72 in.) |
| Width | 1852 mm (72.91 in.) |
| Width including mirrors | 2081 mm (81.93 in.) |
| Height | 1383 mm (54.45 in.) |
| Wheelbase | 2851 mm (112.24 in.) |
| Front track | 1575 mm (62.01 in.) |
| Rear (Back) track | 1611 mm (63.43 in.) |
| Front overhang | 858 mm (33.78 in.) |
| Rear overhang | 1059 mm (41.69 in.) |
| Ride height (ground clearance) | 127 mm (5 in.) |
| Drag coefficient (Cd) | 0.25 |
| Minimum turning circle (turning diameter) | 11.4 m (37.4 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 | Double wishbone |
| 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 98Y XL |
| Wheel rims size | 7.5J x 17 |
INTRODUCTION
The BMW 430i Coupe (G22) with the Steptronic transmission, launched in 2020, aimed to deliver a sporty yet comfortable grand touring experience. It slots into the 4 Series range as a balanced option, offering a significant performance upgrade over the base 420i while remaining more accessible than the performance-focused M440i. The G22 generation marked a significant departure in styling from the previous F32, adopting a larger, more controversial kidney grille. However, the underlying engineering focused on improving driving dynamics, refinement, and technology integration. This variant was primarily marketed towards buyers seeking a premium coupe experience with a blend of performance and efficiency.
Powertrain & Engine Architecture
At the heart of the 430i lies 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 BMW’s VALVETRONIC variable valve timing and lift system. VALVETRONIC allows for precise control of valve timing and lift, optimizing engine performance and fuel efficiency across a wide range of driving conditions. The engine produces 258 horsepower at 5000-6500 rpm and 295 lb-ft of torque from 1550-4400 rpm. This torque curve provides strong low-end and mid-range acceleration. The engine is longitudinally mounted, driving the rear wheels. Paired with the B48 is BMW’s 8-speed Steptronic automatic transmission. This transmission features a torque converter and offers smooth, quick shifts. It includes features like launch control and adaptive shift programs to optimize performance and efficiency.
Driving Characteristics
The 430i Steptronic delivers a refined and engaging driving experience. The 8-speed automatic transmission is well-tuned, providing seamless gear changes and contributing to a comfortable ride. While not as aggressively geared as a manual transmission, the Steptronic offers responsive shifts and allows the engine to remain within its optimal power band. Acceleration from 0-60 mph takes approximately 5.5 seconds, making it a genuinely quick coupe. The rear-wheel-drive configuration contributes to a balanced chassis and predictable handling. Compared to a manual transmission equipped 430i, the Steptronic prioritizes ease of use and comfort over outright driver engagement. The higher-output M440i offers significantly more power and a sportier driving experience, while the 420i provides a more economical, but less powerful, alternative.
Equipment & Trim Levels
The 430i Steptronic came standard with a comprehensive list of features, including BMW’s iDrive infotainment system with a 12.3-inch touchscreen display, Apple CarPlay and Android Auto compatibility, a premium sound system, and leatherette upholstery. Standard safety features included automatic emergency braking, lane departure warning, and forward collision warning. Optional extras included a sunroof, heated seats, a head-up display, and a Harman Kardon surround sound system. Interior trim options ranged from aluminum to wood veneers, allowing buyers to personalize the cabin. The standard dashboard configuration featured a driver-focused layout with intuitive controls.
Chassis & Braking
The G22 430i utilizes a double-wishbone front suspension and an independent multi-link rear suspension. This setup provides a comfortable ride while maintaining precise handling. The suspension is tuned to balance sportiness and comfort, offering a good compromise for everyday driving. Braking duties are handled by ventilated discs on all four wheels. The braking system is responsive and provides ample stopping power. ABS (Anti-lock Braking System) is standard. The 430i’s weight distribution is nearly 50/50, contributing to its balanced handling characteristics.
Market Reception & Comparison
The 430i Steptronic was generally well-received by automotive critics. Reviewers praised its refined driving experience, powerful engine, and comfortable interior. The controversial styling of the G22 generation was a point of contention, but the overall driving dynamics and technology were widely appreciated. Compared to the 420i, the 430i offered a noticeable performance upgrade, making it the more popular choice for buyers seeking a more engaging driving experience. Fuel economy was competitive for its class, with combined figures ranging from 31.8 to 35.6 US mpg. Reliability reports have been generally positive, with the B48 engine proving to be a robust and dependable unit.
Legacy
The BMW 430i Steptronic (G22) represents a significant step forward in the evolution of the 4 Series coupe. The B48 engine and 8-speed Steptronic transmission have proven to be a reliable and efficient powertrain combination. On the used car market, these models hold their value relatively well, particularly those with low mileage and a well-maintained service history. The G22 430i continues to be a popular choice for buyers seeking a stylish, sporty, and refined coupe experience.
