2018 BMW 6 Series Gran Coupe 3.0 640d M Sport

Overview

• Make: BMW
• Model: 6 Series Gran Coupe
• Trim: M Sport
• Version: 3.0 640d M Sport Auto RWD Euro 6 (s/s) 4dr (309 bhp)
• Year: 2018
• Mileage: 69,100 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 152 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW 6 Series Gran Coupe M Sport has covered 69,100 miles, around 8,400 more miles than is typical for its age. Its asking price of £13,995 is £3,916 below the AskCar estimate of £17,911. The AskCar estimate uses UK dealer asking prices, including 112 BMW 6 Series Gran Coupe adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 28 days ago. Its asking price has since fallen by £1,000. We checked its advertised mileage against the government's MOT record, and they match. It is for sale at HF Cars in Mill Hill. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Good value: £3,916 (21%) under the AskCar estimate of £17,911.

The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.

It draws on 112 priced BMW 6 Series Gran Coupe adverts across different ages and specifications, as of 7 November 2026.

A 2018 BMW 6 Series Gran Coupe with the 3.0 diesel engine is typically advertised at £18,000: the median of the 19 for sale on AskCar, as of 7 November 2026.

Time on sale

This 2018 BMW 6 Series Gran Coupe has been on sale for at least 28 days.

Price history

AskCar first saw this advert on 10 October 2026 at £14,995. Its asking price is now £13,995, £1,000 less. The latest price cut was seen on 6 November 2026.

Price changes recorded:

• 10 October 2026: £14,995
• 15 October 2026: £14,500
• 6 November 2026: £13,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 30 September 2027.

It has had 8 MOTs. The latest, on 25 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 69,080 miles, which matches the advertised 69,100 miles.

Advertised mileage is about 8,400 miles higher than the median mileage of a 2018 BMW 6 Series Gran Coupe on AskCar.

Similar cars

18 other 2018 BMW 6 Series Gran Coupe M Sport 3.0 diesel automatic saloons are for sale at UK dealers, from £15,495 to £27,995, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, multicolour. Mileage: 67,211 miles. Price: £17,500, £3,505 more than this car. Dealer: Scottish Motor Services in Glasgow. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-7d90bf994f88
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 62,612 miles. Price: £17,299, £3,304 more than this car. Dealer: Fords Of Winsford Car Supermarket in Winsford. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-80609cdd7393
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 76,237 miles. Price: £17,090, £3,095 more than this car. Dealer: Stratstone BMW Bury St Edmunds in Bury St Edmunds. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-7c43cf8d15cf

• The nearest: 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black, 18 miles from this car. Mileage: 60,000 miles. Price: £20,995, £7,000 more than this car. Dealer: AM Autohaus in Slough. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-c0afc08c8950