2018 BMW 3 Series 340i xDrive 6MT
Unverified
All photo credits
- Photo: 2017 BMW 330i xDrive Sedan in Jet Black, front right, 2025-10-17 by Elise240SX, CC BY-SA 4.0, via Wikimedia Commons
- Photo: BMW 3 Series F31 by Calreyn88, CC BY-SA 4.0, via Wikimedia Commons
- Photo: BMW F30 LCI 320i Luxury Line Glacier Silver Metallic (3) by Damian B Oh, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 2018 BMW M3 Rear by Vauxford, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 2018 BMW 340i M Sport Shadow 3.0 Interior by Vauxford, CC BY-SA 4.0, via Wikimedia Commons
The 2018 BMW 3 Series 340i xDrive 6MT is a 320-hp turbocharged inline-6 with a 6-speed manual and all-wheel drive. It starts at $50,950 MSRP and is rated at 23 mpg combined.
It makes 320 horsepower at 5,500 rpm and 332 lb-ft of torque at 1380-5000 rpm, spinning to a 7,000 rpm redline. EPA fuel-economy estimates are 19 mpg city and 29 mpg highway (23 mpg combined).
The 3 Series measures 182.8 inches long on a 110.6-inch wheelbase.
| Spec | Value |
|---|---|
| Vehicle | |
| Powertrain | Gas |
| Price | |
| MSRP | $50,950 |
| MSRP with Destination | $51,945 |
| Destination Charge | $995 |
| Engine | |
| Engine Type | 3.0L Inline-6 TwinPower Turbo (B58) |
| Horsepower | 320 hp @ 5,500 rpm |
| Torque | 332 lb-ft @ 1380-5000 rpm |
| Redline | 7,000 rpm |
| Valvetrain | DOHC 24V VALVETRONIC Double-VANOS |
| Bore and Stroke | 82.0 x 94.6 |
| Compression Ratio | 11.0:1 |
| Injection Type | High Precision Injection (direct) |
| Drivetrain | |
| Drive Type | AWD (xDrive) |
| Transmission | |
| Transmission | 6-speed manual |
| 1st Gear | 4.11 (41 mph **) |
| 2nd Gear | 2.315 (72 mph **) |
| 3rd Gear | 1.542 (109 mph **) |
| 4th Gear | 1.179 (142 mph **) |
| 5th Gear | 1 (167 mph **) |
| 6th Gear | 0.846 (198 mph **) |
| Reverse | 3.727 |
| Final Drive | 3.231 |
| Fuel Economy | |
| City | 19 MPG |
| Highway | 29 MPG |
| Combined | 23 MPG |
| Recommended Fuel | Premium |
| Tank Capacity | 15.8 gal |
| Suspension | |
| Front Suspension | 2-link strut |
| Rear Suspension | five-link |
| Turning Diameter | 38.4 ft |
| Tires & Wheels | |
| Wheels Front | 18 x 8.0 |
| Wheels Rear | 18 x 8.0 |
| Tires Front | 225/45R18 |
| Tires Rear | 225/45R18 |
| Dimensions & Weight | |
| Length | 182.8 in |
| Width | 71.3 in |
| Height | 56.5 in |
| Wheelbase | 110.6 in |
| Front Track | 60.5 in |
| Rear Track | 62 in |
| Ground Clearance | 5.7 in |
| Cargo Volume | 17 ft³ |
| Interior | |
| Headroom Front | 40.3 in |
| Headroom Rear | 37.7 in |
| Legroom Front | 42 in |
| Legroom Rear | 35.1 in |
| Shoulder Room Front | 55.1 in |
| Shoulder Room Rear | 55.1 in |
Similar cars
Rivals to the 2018 BMW 3 Series 340i xDrive 6MT with similar size, power and price from around the same years.
Safety & Recalls
NCAP safety ratings
| Overall | ★★★★★ |
| Frontal crash | ★★★★★ |
| Side crash | ★★★★★ |
| Rollover | ★★★★★ (9.5 % risk) |
Other tested variants (2)
- 2018 BMW 3 Series 4 DR AWD: 5 ★ overall
- 2018 BMW 3 Series 4 DR RWD: 5 ★ overall
Recalls
No recalls on file with NHTSA for the 2018 BMW 3 SERIES.
60 owner complaints to NHTSA for the 2018 BMW 3 SERIES
Owner Complaints
60 owner complaints filed with NHTSA for the 2018 BMW 3 SERIES (5 mention a crash, 4 a fire, 4 an injury). See all on nhtsa.gov
| Engine | 19 |
| Electrical System | 15 |
| Fuel/Propulsion System | 10 |
| Unknown Or Other | 8 |
| Fuel System | 7 |
| Diesel | 6 |
Complaints are unverified reports submitted to NHTSA by owners. They cover the whole model year, not a specific trim, and a count alone doesn't show how common a problem is.
Source: US National Highway Traffic Safety Administration (nhtsa.gov), matched as 2018 BMW 3 SERIES. US-market vehicles only; data cached for up to 7 days.