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: 53,125 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

With 53,125 miles on the clock, this 2018 BMW 6 Series Gran Coupe M Sport has done roughly 7,600 fewer miles than a typical 2018 BMW 6 Series Gran Coupe. Priced at £18,989, it is advertised £967 below the AskCar estimate of £19,956. The AskCar estimate uses 111 UK dealer adverts for the BMW 6 Series Gran Coupe, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 52 days ago. Its asking price has since fallen by £760. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at A6 Motors in Bedford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £967 (4%) under the AskCar estimate of £19,956.

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 111 priced BMW 6 Series Gran Coupe adverts across different ages and specifications, as of 6 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 6 November 2026.

Time on sale

This 2018 BMW 6 Series Gran Coupe has been on sale for at least 52 days.

Price history

AskCar first saw this advert on 15 September 2026 at £19,749. Its asking price is now £18,989, £760 less. The latest price cut was seen on 9 October 2026.

Price changes recorded:

• 15 September 2026: £19,749
• 9 October 2026: £18,989

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 20 May 2027.

It failed its MOT on 13 May 2026 (nearside rear tyre has a bulge, caused by separation or partial failure of its structure bulge on inner sidewall) and passed later the same day.

Advisories at the latest test: rear brake pad(s) wearing thin; front brake pad(s) wearing thin.

Mileage at that test: 50,238 miles, which matches the advertised 53,125 miles.

Advertised mileage is about 7,600 miles lower 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 £13,995 to £27,995, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 50,003 miles. Price: £19,995, £1,006 more than this car. Dealer: Essex Cars in Colchester. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-596c8203ef7c
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 60,000 miles. Price: £20,495, £1,506 more than this car. Dealer: Essex Cars in Colchester. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-91f8ec35a84a
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 60,000 miles. Price: £20,995, £2,006 more than this car. Dealer: AM Autohaus in Slough. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-c0afc08c8950

• The nearest: 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, blue, 25 miles from this car. Mileage: 69,100 miles. Price: £13,995, £4,994 less than this car. Dealer: HF Cars in Barnet. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-fb241ad511c9