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: 76,237 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 152 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 76,237 miles on the clock, this 2018 BMW 6 Series Gran Coupe M Sport has done roughly 15,500 more miles than a typical 2018 BMW 6 Series Gran Coupe. The dealer is asking £17,090, which is £87 above the AskCar estimate of £17,003. To work out the AskCar estimate, we analyse UK dealer adverts for 111 BMW 6 Series Gran Coupe cars across different ages and specifications. Since we first spotted the advert 57 days ago, the asking price has dropped by £700. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Stratstone BMW Bury St Edmunds, based in Bury St Edmunds. 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: £87 (under 1%) over the AskCar estimate of £17,003.

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 57 days.

Price history

AskCar first saw this advert on 10 September 2026 at £17,790. Its asking price is now £17,090, £700 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 10 September 2026: £17,790
• 20 September 2026: £17,090
• 2 October 2026: £16,990
• 15 October 2026: £17,290
• 16 October 2026: £17,190
• 27 October 2026: £17,090

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 3 September 2027.

It has had 8 MOTs. The latest, on 26 August 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 76,184 miles, which matches the advertised 76,237 miles.

Advertised mileage is about 15,500 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 £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, blue. Mileage: 81,093 miles. Price: £16,999, £91 less than this car. Dealer: Brookway Cars in Prenton. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-cd5eff11c2c0
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, silver. Mileage: 82,568 miles. Price: £16,995, £95 less than this car. Dealer: Lion Car Hub in Farnham. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-fda04483b99a
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, blue. Mileage: 69,100 miles. Price: £13,995, £3,095 less than this car. Dealer: HF Cars in Barnet. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-fb241ad511c9

• The nearest: 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, blue, 7 miles from this car. Mileage: 60,940 miles. Price: £22,000, £4,910 more than this car. Dealer: Sam Jordan Cars in Stanningfield. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-5cbccdd5f07d