The BMW 3 Series Touring (F31 LCI), specifically the 340i xDrive Steptronic variant, represents a compelling blend of performance, practicality, and luxury within the premium compact executive estate (station wagon) segment. Produced from 2015 to 2019 as part of the F31 Life Cycle Impulse (LCI) facelift, this model aimed to refine the already successful F31 generation. It occupied a high-performance position within the 3 Series Touring lineup, sitting above the 320i and 330i models, and offering a more engaging driving experience than the diesel-powered 330d. The “xDrive” designation indicates BMW’s all-wheel-drive system, while “Steptronic” refers to the eight-speed automatic transmission.
Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Touring (F31 LCI, Facelift 2015) |
| Type | 340i (326 Hp) xDrive Steptronic |
| Start of production | 2015 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 10.1-9.6 l/100 km (23.3 – 24.5 US mpg) |
| Fuel consumption (extra urban) | 6.1-5.8 l/100 km (38.6 – 40.6 US mpg) |
| Fuel consumption (combined) | 7.6-7.2 l/100 km (30.9 – 32.7 US mpg) |
| CO2 emissions | 176-168 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5 sec |
| Acceleration 0 – 62 mph | 5 sec |
| Acceleration 0 – 60 mph | 4.8 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5.2 kg/Hp |
| Weight-to-torque ratio | 3.7 kg/Nm |
| Power | 326 Hp @ 5500-6500 rpm |
| Torque | 450 Nm @ 1380-5000 rpm (331.9 lb.-ft. @ 1380-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30A |
| Engine displacement | 2998 cm3 (182.95 cu. in.) |
| Number of cylinders | 6 |
| 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 | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 7.8 l (8.24 US qt | 6.86 UK qt) |
| Kerb Weight | 1680 kg (3703.77 lbs.) |
| Max. weight | 2230 kg (4916.31 lbs.) |
| Max load | 550 kg (1212.54 lbs.) |
| Trunk (boot) space – minimum | 495 l (17.48 cu. ft.) |
| Trunk (boot) space – maximum | 1500 l (52.97 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%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4633 mm (182.4 in.) |
| Width | 1811 mm (71.3 in.) |
| Height | 1434 mm (56.46 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1531 mm (60.28 in.) |
| Rear track | 1570 mm (61.81 in.) |
| Ride height (ground clearance) | 145 mm (5.71 in.) |
| Drag coefficient (Cd) | 0.32 |
| Minimum turning circle | 11.7 m (38.39 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | 8 |
| Gearbox type | 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 98W |
| Wheel rims size | 7.5J x 17 |
Powertrain & Engine Architecture
At the heart of the 340i xDrive Steptronic lies the B58B30A 3.0-liter inline-six engine. This engine is a cornerstone of BMW’s modern powertrain strategy, known for its smooth power delivery and responsiveness. The B58 features a single twin-scroll turbocharger, direct fuel injection, and Double-VANOS variable valve timing for both intake and exhaust. The engine produces 326 horsepower at 5,500-6,500 rpm and 450 Nm (331.9 lb-ft) of torque between 1,380 and 5,000 rpm. This broad torque curve contributes to strong acceleration in real-world driving conditions. The engine’s longitudinal mounting and rear-wheel-bias inherent in the xDrive system contribute to balanced handling. The eight-speed Steptronic automatic transmission is a torque-converter type, offering smooth and quick shifts. It features adaptive shift programs that adjust to the driver’s style and driving conditions. Manual shift control is available via steering wheel-mounted paddles.
Driving Characteristics
The 340i xDrive Steptronic delivers a refined yet engaging driving experience. The xDrive all-wheel-drive system provides excellent traction, particularly in inclement weather, and enhances cornering stability. While not as raw or visceral as a rear-wheel-drive 340i with a manual transmission, the automatic offers effortless cruising and responsive acceleration. The eight-speed transmission is well-matched to the engine’s characteristics, providing quick and seamless gear changes. Compared to the 320i or 330i models, the 340i offers significantly more power and torque, resulting in noticeably quicker acceleration and more confident overtaking. The steering is precise and well-weighted, providing good feedback to the driver. The suspension strikes a good balance between comfort and handling, absorbing bumps effectively while maintaining body control.
Equipment & Trim Levels
The 340i xDrive Steptronic typically came well-equipped as standard. Common features included leather upholstery, power-adjustable front seats with memory function, a premium sound system, automatic climate control, and a comprehensive suite of safety features such as lane departure warning, forward collision warning, and automatic emergency braking. Optional extras included a head-up display, navigation system, adaptive cruise control, and a panoramic sunroof. Interior trim options ranged from wood veneers to aluminum accents, allowing buyers to personalize the cabin to their preferences. The LCI facelift brought subtle interior updates, including revised trim materials and updated infotainment system graphics.
Chassis & Braking
The F31 340i xDrive Steptronic utilizes a sophisticated chassis design. The front suspension features independent coil springs and struts, while the rear suspension employs a multi-link setup. This configuration provides a comfortable ride and precise handling. The xDrive all-wheel-drive system distributes power between the front and rear axles as needed, optimizing traction and stability. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. The electronic stability control (ESC) system helps to maintain control during emergency maneuvers. The steering system is an electric power-assisted rack-and-pinion setup, offering precise and responsive steering feel.
Market Reception & Comparison
The 340i xDrive Steptronic was generally well-received by automotive critics. It was praised for its powerful engine, refined driving experience, and practical estate body style. Compared to the 330i, the 340i offered a significant performance upgrade, while remaining relatively fuel-efficient. The xDrive system provided added security and confidence in all weather conditions. However, some critics noted that the automatic transmission, while smooth, lacked the engagement of a manual gearbox. Fuel economy figures were respectable for a performance estate, averaging around 30-33 mpg in combined driving. Reliability has generally been good, although preventative maintenance is crucial for long-term ownership.
Legacy
The BMW 3 Series Touring (F31 LCI) 340i xDrive Steptronic has established itself as a desirable used car. The B58 engine is considered robust and reliable, provided it is properly maintained. The combination of performance, practicality, and luxury makes it a compelling choice for buyers seeking a premium estate car. The xDrive system adds to its appeal in regions with challenging weather conditions. As with any used vehicle, a thorough inspection and maintenance history check are essential before purchase. The F31 340i continues to be a popular choice among enthusiasts and those seeking a well-rounded and capable touring car.
