The BMW 5 Series G30 520i Steptronic, produced from 2017 to 2020, represents the entry point into the seventh generation of BMW’s iconic mid-size executive sedan. Positioned as a volume seller, this variant aimed to deliver a balance of BMW’s renowned driving dynamics, luxury, and efficiency to a broader customer base. It served as the foundation for the G30 lineup, offering a more accessible price point compared to its higher-powered six and eight-cylinder siblings. The 520i Steptronic was primarily marketed in Europe and Asia, where smaller displacement engines are favored due to tax regulations and fuel costs, though it was also available in limited quantities in North America.
Technical Specifications
| Brand | BMW |
| Model | 5 Series |
| Generation | 5 Series Sedan (G30) |
| Type (Engine) | 520i (184 Hp) Steptronic |
| Start of production | 2017 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 6.9-7.2 l/100 km (34.1 – 32.7 US mpg) |
| Fuel consumption (extra urban) | 4.6-5.1 l/100 km (51.1 – 46.1 US mpg) |
| Fuel consumption (combined) | 5.4-5.9 l/100 km (43.6 – 39.9 US mpg) |
| CO2 emissions | 124-134 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.8 sec |
| Acceleration 0 – 62 mph | 7.8 sec |
| Acceleration 0 – 60 mph | 7.4 sec |
| Maximum speed | 235 km/h (146.02 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 8.3 kg/Hp |
| Weight-to-torque ratio | 5.3 kg/Nm |
| Power | 184 Hp @ 5000-6500 rpm |
| Torque | 290 Nm @ 1350-4250 rpm (213.89 lb.-ft.) |
| 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 | 11:1 |
| 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 | 9.9 l (10.46 US qt | 8.71 UK qt) |
| Kerb Weight | 1530 kg (3373.07 lbs.) |
| Max. weight | 2200 kg (4850.17 lbs.) |
| Max load | 670 kg (1477.1 lbs.) |
| Trunk (boot) space – minimum | 530 l (18.72 cu. ft.) |
| Fuel tank capacity | 68 l (17.96 US gal | 14.96 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 90 kg (198.42 lbs.) |
| Length | 4936 mm (194.33 in.) |
| Width | 1868 mm (73.54 in.) |
| Height | 1479 mm (58.23 in.) |
| Wheelbase | 2975 mm (117.13 in.) |
| Front track | 1605 mm (63.19 in.) |
| Rear (Back) track | 1630 mm (64.17 in.) |
| Ride height (ground clearance) | 144 mm (5.67 in.) |
| Drag coefficient (Cd) | 0.24 |
| Minimum turning circle | 12.05 m (39.53 ft.) |
| Drivetrain Architecture | 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 | 225/55 R17; 245/45 R18; 275/40 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8J x 19; 9J x 19; 9J x 18; 8J x 20; 9J x 20 |
Powertrain & Engine Architecture
The 520i Steptronic is powered by BMW’s B48B20B 2.0-liter inline-four cylinder engine. This engine is a member of BMW’s modular engine family, utilizing a single-scroll, twin-scroll turbocharger with an intercooler to deliver 184 horsepower and 290 Nm (213.89 lb-ft) of torque. The B48 engine features direct fuel injection, operating at a compression ratio of 11:1. The engine’s valvetrain employs BMW’s VANOS variable valve timing and Double-VANOS variable valve lift, optimizing performance and efficiency across the rev range. The engine is longitudinally mounted, driving the rear wheels. The “Steptronic” transmission refers to BMW’s 8-speed automatic transmission, known for its smooth shifts and efficiency. This transmission features a torque converter and allows for both automatic and manual gear selection via steering wheel-mounted paddles or the gear selector.
Driving Characteristics
The 520i Steptronic offers a comfortable and refined driving experience. While not as overtly sporty as the 530i or 540i models, the 2.0-liter engine provides adequate power for everyday driving and highway cruising. Acceleration from 0-60 mph takes approximately 7.4 seconds. The 8-speed automatic transmission is well-tuned, providing seamless gear changes and contributing to good fuel economy. The gear ratios are optimized for both acceleration and fuel efficiency, with a relatively tall final drive. Compared to the manual transmission option (available in some markets), the Steptronic offers greater convenience and ease of use, but slightly diminishes driver engagement. The 520i’s suspension setup prioritizes comfort, resulting in a smooth ride quality, though it may exhibit some body roll during aggressive cornering.
Equipment & Trim Levels
The 520i Steptronic typically came standard with features such as BMW’s iDrive infotainment system with a 10.25-inch touchscreen display, automatic climate control, power-adjustable front seats, and a leather-wrapped steering wheel. Interior upholstery was typically cloth or leatherette, with optional full leather available. Standard safety features included ABS, stability control, and multiple airbags. Optional extras included a premium sound system, navigation system, head-up display, and various driver-assistance systems like lane departure warning and adaptive cruise control. Trim levels varied by market, but generally offered packages that bundled popular options together.
Chassis & Braking
The G30 5 Series utilizes a lightweight chassis construction, incorporating high-strength steel and aluminum components. The front suspension features a double-wishbone design, while the rear suspension employs an independent multi-link setup. This configuration provides a good balance of ride comfort and handling precision. The 520i typically came equipped with ventilated disc brakes on all four wheels. ABS (Anti-lock Braking System) is standard, along with electronic brake-force distribution and brake assist. The suspension tuning is generally softer than that of the higher-performance models, reflecting the 520i’s focus on comfort.
Market Reception & Comparison
The 520i Steptronic was generally well-received by automotive critics as a sensible and well-rounded executive sedan. It was praised for its comfortable ride, refined interior, and fuel efficiency. However, some critics noted that the 2.0-liter engine could feel underpowered, particularly when fully loaded or during aggressive driving. Compared to the 530i, which featured a more powerful six-cylinder engine, the 520i offered a lower price point but sacrificed performance. Against competitors like the Mercedes-Benz E200 and Audi A6 2.0 TFSI, the 520i held its own in terms of driving dynamics and interior quality, often offering a more engaging driving experience than its rivals.
Legacy
The B48 engine, found in the 520i Steptronic, has proven to be a relatively reliable powertrain. While some early B48 engines experienced issues with oil leaks and timing chain wear, these problems were largely addressed in later revisions. The 8-speed Steptronic transmission is also known for its durability. In the used car market, the G30 520i Steptronic represents a good value proposition, offering a luxurious and well-equipped sedan at a more affordable price point than its higher-powered siblings. Maintenance costs are generally reasonable, though preventative maintenance, such as regular oil changes and coolant flushes, is crucial to ensure long-term reliability.
