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: 60,000 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

This 2018 BMW 6 Series Gran Coupe M Sport has covered 60,000 miles. The dealer is asking £20,995, which is £1,869 above the AskCar estimate of £19,126. To work out the AskCar estimate, we analyse UK dealer adverts for 110 BMW 6 Series Gran Coupe cars across different ages and specifications. We first recorded this advert 165 days ago, and its asking price has since fallen by £1,000. Ask the dealer why the advert shows fewer miles than the 61,105 recorded at the latest MOT. MOT records show an expiry date of 28 April 2027. It is for sale at AM Autohaus in Slough. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 9 November 2026.

How we estimate prices and check cars

Price

Above the going rate: £1,869 (9%) over the AskCar estimate of £19,126.

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 110 priced BMW 6 Series Gran Coupe adverts across different ages and specifications, as of 9 November 2026.

A 2018 BMW 6 Series Gran Coupe with the 3.0 diesel engine is typically advertised at £17,900: the median of the 20 for sale on AskCar, as of 9 November 2026.

Time on sale

This 2018 BMW 6 Series Gran Coupe has been on sale for at least 165 days.

Price history

AskCar first saw this advert on 28 May 2026 at £21,995. Its asking price is now £20,995, £1,000 less. The latest price cut was seen on 13 August 2026.

Price changes recorded:

• 28 May 2026: £21,995
• 13 August 2026: £20,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 9 November 2026: valid until 28 April 2027.

It has had 8 MOTs. The latest, on 29 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 61,105 miles. The advert says 60,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 1,000 miles lower than the median mileage of a 2018 BMW 6 Series Gran Coupe on AskCar.

Similar cars

19 other 2018 BMW 6 Series Gran Coupe M Sport 3.0 diesel automatic saloons are for sale at UK dealers, from £2,000 to £27,995, as of 9 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 60,118 miles. Price: £17,999, £2,996 less than this car. Dealer: Ccs Car Sales in Thatcham. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-050635845dec
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 60,667 miles. Price: £17,730, £3,265 less than this car. Dealer: Auto Choice in Newtownards. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-f0262eb1807d
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 60,700 miles. Price: £18,495, £2,500 less than this car. Dealer: BM Automotive (Sw) in Saltash. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-467be055952f

• The nearest: 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, blue, 18 miles from this car. Mileage: 69,100 miles. Price: £13,995, £7,000 less than this car. Dealer: HF Cars in Barnet. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-fb241ad511c9