The BMW 730d xDrive Steptronic, produced from 2015 to 2019 as part of the G11 generation of the 7 Series, represented a core offering in BMW’s flagship sedan lineup. Positioned as a diesel-powered variant, it aimed to balance luxury, performance, and fuel efficiency, particularly appealing to European markets where diesel engines held significant popularity. This model served as a more economical alternative to the higher-performance gasoline options like the 750i, while still delivering a premium driving experience and the advanced technology expected of a 7 Series. The 730d occupied a mid-range position within the G11 lineup, offering a compelling blend of features and capabilities.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series (G11) |
| Type (Engine) | 730d (265 Hp) xDrive Steptronic |
| Start of production | 2015 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 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) |
| Fuel consumption (extra urban) | 4.3-4.6 l/100 km (54.7 – 51.1 US mpg, 65.7 – 61.4 UK mpg, 23.3 – 21.7 km/l) |
| Fuel consumption (combined) | 4.8-5.2 l/100 km (49 – 45.2 US mpg, 58.9 – 54.3 UK mpg, 20.8 – 19.2 km/l) |
| CO2 emissions | 127-137 g/km |
| Fuel Type | Diesel |
| 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 | 6.9 kg/Hp, 145.2 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 339.7 Nm/tonne |
| Power | 265 Hp @ 4000 rpm |
| Torque | 620 Nm @ 2000-2500 rpm (457.29 lb.-ft. @ 2000-2500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B57D30A |
| 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 | 11.9 l (12.57 US qt | 10.47 UK qt) |
| Kerb Weight | 1825 kg (4023.44 lbs.) |
| Max. weight | 2540 kg (5599.74 lbs.) |
| Max load | 715 kg (1576.31 lbs.) |
| Trunk (boot) space – minimum | 515 l (18.19 cu. ft.) |
| Fuel tank capacity | 78 l (20.61 US gal | 17.16 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 5098 mm (200.71 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1478 mm (58.19 in.) |
| Wheelbase | 3070 mm (120.87 in.) |
| Front track | 1617 mm (63.66 in.) |
| Rear (Back) track | 1646 mm (64.8 in.) |
| Ride height (ground clearance) | 135 mm (5.31 in.) |
| Drag coefficient (Cd) | 0.25 |
| Minimum turning circle (turning diameter) | 12.5 m (41.01 ft.) |
| Drive wheel | All wheel drive (4×4) |
| 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 |
| Tires size | 225/60 R17 99Y; 245/50 R18; 245/45 R19; 275/40 R19; 245/40 R20; 275/35 R20; 245/35 R21; 275/30 R21 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 19; 9.5J x 19; 8.5J x 20; 10J x 20; 8.5J x 21; 10J x 21 |
Powertrain & Engine Architecture
The heart of the 730d xDrive is BMW’s B57D30A 3.0-liter inline-six diesel engine. This engine is a member of the modular BMW engine family, known for its robust construction and advanced technology. The B57 features a common-rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. A twin-scroll turbocharger, coupled with intercooling, provides a significant boost in power and torque. The engine also incorporates variable valve timing (VANOS) and Double-VANOS technology to enhance efficiency and responsiveness. The engine produces 265 horsepower at 4,000 rpm and a substantial 620 Nm (457 lb-ft) of torque between 2,000 and 2,500 rpm. This torque output is a key characteristic of the engine, providing strong acceleration and effortless cruising. The engine is paired with BMW’s 8-speed Steptronic automatic transmission, known for its smooth shifts and efficiency. This transmission is electronically controlled and adapts to driving conditions, offering both automatic and manual shift modes.
Driving Characteristics
The 730d xDrive delivers a refined and comfortable driving experience. The high torque output of the diesel engine provides strong acceleration, especially in the mid-range. While not as overtly sporty as the gasoline-powered 7 Series models, the 730d offers ample power for confident overtaking and highway cruising. The 8-speed automatic transmission contributes to smooth and seamless gear changes, enhancing the overall driving experience. The xDrive all-wheel-drive system provides excellent traction and stability in all weather conditions. Compared to the 740i or 750i, the 730d prioritizes fuel efficiency and relaxed cruising over outright performance. The gear ratios are tuned for efficiency, with taller gearing in higher gears to reduce engine speed at highway speeds. The 730d feels noticeably heavier than its gasoline counterparts, impacting agility in tight corners, but the well-tuned suspension minimizes body roll and provides a comfortable ride.
Equipment & Trim Levels
The 730d xDrive typically came well-equipped with standard features including leather upholstery, power-adjustable seats with memory function, a premium sound system, a large infotainment screen with iDrive controller, and a comprehensive suite of safety features. Optional extras included features like massaging seats, a rear-seat entertainment system, advanced driver-assistance systems (such as adaptive cruise control and lane-keeping assist), and upgraded interior trim options. Trim levels varied by market, but generally offered packages that added features like enhanced lighting, upgraded wheels, and more luxurious interior materials. The standard interior configuration featured dark wood trim and comfortable, supportive seats.
Chassis & Braking
The G11 7 Series utilizes a sophisticated chassis design featuring a double-wishbone front suspension and an independent multi-link rear suspension. This setup provides a comfortable ride while maintaining good handling characteristics. The 730d xDrive typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The braking system is assisted by ABS (Anti-lock Braking System), electronic brake-force distribution (EBD), and brake assist. The suspension is tuned to prioritize comfort, with softer spring rates and dampers compared to the more performance-oriented 7 Series models. Stabilizer bars are used to reduce body roll during cornering.
Market Reception & Comparison
The 730d xDrive was generally well-received by automotive critics, who praised its fuel efficiency, comfortable ride, and refined driving experience. It was often seen as a sensible choice for buyers who prioritized practicality and economy without sacrificing luxury. Compared to the 740i, the 730d offered significantly better fuel economy, but with slightly less power and performance. Compared to the 750i, the 730d represented a more affordable entry point into the 7 Series range, albeit with a noticeable step down in performance. Reliability reports suggest that the B57 engine is generally robust and reliable, although diesel engines can be more susceptible to issues related to the fuel injection system and particulate filter.
Legacy
The BMW 730d xDrive (G11) has established itself as a reliable and relatively affordable entry point into the luxury 7 Series ownership experience on the used car market. The B57 engine has proven to be durable, and with proper maintenance, these vehicles can provide many years of service. The combination of luxury, technology, and fuel efficiency continues to appeal to buyers seeking a comfortable and capable grand tourer. While newer 7 Series models offer even more advanced features and technology, the G11 730d remains a compelling option for those seeking a well-rounded and refined luxury sedan.
