DecodedCars2018 BMW 6 Series
Trims, performance, features, fuel economy, safety and known problems — with the pros and cons against similar 2018 models.
- Class
- Subcompact Cars
- Body styles
- 650i Xdrive 2dr Cabriolet, 650i Xdrive 2dr Coupe, Gran Coupe 640i Xdrive 4dr Sedan, Gran Coupe 650i Xdrive 4dr Sedan
- Engines
- 3.0L 6-cyl turbo, 4.4L 8-cyl turbo
- Drivetrain
- Rear-Wheel Drive, All-Wheel Drive
- Fuel
- Premium Gasoline
- MPG (best)
- 23 combined · 20 city / 29 hwy
- Length
- 192.5–200.4 in
- Curb weight
- 4,211–4,650 lb
- NHTSA rating
- Not rated
- Recalls
- 0 campaigns
Pros & cons
What's good
- AWD / 4WD available
- No recalls so far
Watch out for
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Calculated from EPA, NHTSA and vPIC data against 42 similar 2018 models — not a review. How we calculate this →
Overview
The 2018 BMW 6 Series is a subcompact car offered with 2 engines (3.0L 6-cyl turbo and 4.4L 8-cyl turbo) and rear-wheel drive and all-wheel drive.
It measures about 193 inches long and 74 inches wide on a 113-inch wheelbase, with a curb weight of roughly 4,650 lb (650i Xdrive 2dr Cabriolet).
EPA rates its most efficient version at 23 MPG combined (20 city / 29 highway), 3% worse than the 2018 subcompact car average of 23.7 MPG, for an estimated $3,550 a year in fuel.
NHTSA has not published a 5-Star overall rating for this model year.
There are no recalls or owner complaints on file with NHTSA for this model year.
What changed for 2018
No changes to engines, powertrains, drivetrains, size, EPA ratings or NHTSA crash rating compared with the 2017 6 Series — a carry-over year in the data.
Compared with 2017; trim, feature and price changes aren't covered. See the 2017 6 Series →
Dimensions & weight
| Body | Length | Width | Height | Wheelbase | Track F / R | Curb weight | Weight F/R |
|---|---|---|---|---|---|---|---|
| 650i Xdrive 2dr Cabriolet | 192.5 in | 74.4 in | 53.9 in | 112.6 in | 63 / 65.7 in | 4,650 lb | 52/48 |
| 650i Xdrive 2dr Coupe | 192.5 in | 74.4 in | 53.9 in | 112.6 in | 63 / 65.7 in | 4,409 lb | 54/46 |
| Gran Coupe 640i Xdrive 4dr Sedan | 197.2 in | 74.4 in | 54.7 in | 116.9 in | 63 / 65.7 in | 4,330 lb | 53/47 |
| Gran Coupe 650i Xdrive 4dr Sedan | 197.2 in | 74.4 in | 54.7 in | 116.9 in | 63 / 65.7 in | 4,570 lb | 53/47 |
| Gran Turismo 650i Xdrive 4dr Sedan | 200.4 in | 74.8 in | 60.6 in | 120.9 in | 63.8 / 65 in | 4,211 lb |
Transport Canada CVS (Open Government Licence – Canada), Canadian-market figures.
Will it fit your garage? Check with your measurements →Engines, MPG & running costs
| Version | Engine | Transmission | Drive | City / Hwy / Comb | vs. class | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|---|---|
| 640i Convertible | 3.0L 6-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 20 / 29 / 23 | -3% | $3,550 | 378 |
| 640i Gran Coupe | 3.0L 6-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 20 / 29 / 23 | -15% | $3,550 | 378 |
| 640i xDrive Gran Turismo | 3.0L 6-cyl turbo | Automatic (S8) | All-Wheel Drive | 20 / 28 / 23 | 0% | $3,550 | 388 |
| 640i xDrive Convertible | 3.0L 6-cyl turbo | Automatic (S8) | All-Wheel Drive | 19 / 28 / 22 | -7% | $3,750 | 396 |
| 640i xDrive Gran Coupe | 3.0L 6-cyl turbo | Automatic (S8) | All-Wheel Drive | 19 / 28 / 22 | -19% | $3,750 | 396 |
| 650i Convertible | 4.4L 8-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 17 / 25 / 20 | -16% | $4,100 | 449 |
| 650i Gran Coupe | 4.4L 8-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 17 / 25 / 20 | -26% | $4,100 | 449 |
| 650i xDrive Convertible | 4.4L 8-cyl turbo | Automatic (S8) | All-Wheel Drive | 16 / 25 / 19 | -20% | $4,350 | 463 |
| 650i xDrive Gran Coupe | 4.4L 8-cyl turbo | Automatic (S8) | All-Wheel Drive | 16 / 25 / 19 | -30% | $4,350 | 463 |
| Alpina B6 xDrive Gran Coupe | 4.4L 8-cyl turbo | Automatic (S8) | All-Wheel Drive | 16 / 25 / 19 | -30% | $4,350 | 463 |
EPA estimates; "vs. class" is combined MPG against the 2018 EPA class average. How we calculate this →
Safety ratings & technology
NHTSA has not published 5-Star ratings for the 2018 BMW 6 Series.
Similar 2018 subcompact cars
| Model | Best MPG / range | NHTSA overall | Recalls |
|---|---|---|---|
| 2018 BMW 6 Series (this car) | 23 MPG | Not rated | 0 |
| 2018 BMW 5 Series | 30 MPG | Not rated | 0 |
| 2018 Mercedes-Benz E-Class | 25 MPG | ★★★★★ | 0 |
| 2018 Lexus IS | 26 MPG | Not rated | 1 |
| 2018 Mercedes-Benz C-Class | 30 MPG | Not rated | 0 |
| 2018 Tesla Model 3 | 310 mi | ★★★★★ | 19 |
| 2018 Audi A6 | 28 MPG | ★★★★★ | 2 |
Recalls (0)
No vehicle recalls on file with NHTSA for the 2018 BMW 6 Series.
Check your VIN for open recalls at NHTSA ↗Not every 2018 BMW 6 Series is affected — only a VIN check confirms your car.
Owner-reported problems
No owner complaints for the 2018 BMW 6 Series in NHTSA's database since 2015.
Used 2018 BMW 6 Series buyer's checklist
- Run the VIN at nhtsa.gov/recalls. No recalls on file, but check anyway.
- Before you pay: service records, a history report and an independent inspection.
Generated by DecodedCars from NHTSA recalls and owner complaints for the 2018 BMW 6 Series. Not a substitute for a professional inspection.
Other 6 Series years
Compare all years →| Year | MPG (best) | Length | Overall | Recalls | Complaints |
|---|---|---|---|---|---|
| 2019 6 Series | 23 | 200.4 in | Not rated | 0 | 0 |
| 2017 6 Series | 24 | 192.5 in | Not rated | 0 | 0 |
| 2016 6 Series | 24 | 192.5 in | Not rated | 0 | 0 |
| 2015 6 Series | 25 | 192.5 in | Not rated | 0 | 0 |
| 2014 6 Series | 25 | 192.5 in | Not rated | 0 | 0 |
| 2013 6 Series | 26 | 192.5 in | Not rated | 0 | 0 |
| 2012 6 Series | 26 | 192.5 in | Not rated | 1 | 1 |
| 2010 6 Series | 18 | 190.2 in | Not rated | 2 | 0 |
| 2009 6 Series | 18 | 190.2 in | Not rated | 2 | 0 |
| 2008 6 Series | 18 | 189.8 in | Not rated | 2 | 2 |
| 2007 6 Series | 18 | – | Not rated | 2 | 0 |
| 2006 6 Series | 18 | – | Not rated | 2 | 0 |
Sources: EPA, NHTSA, Transport Canada, Wikimedia Commons. Not affiliated with NHTSA, the EPA or BMW. How we calculate this →