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: 60,667 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 60,667 miles. The AskCar estimate for this car is £18,976. It is priced at £17,730, which is £1,246 below that estimate. 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 103 days ago. Its asking price has since fallen by £1,205. The seller is Auto Choice, based in Newtownards. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 10 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,246 (6%) under the AskCar estimate of £18,976.

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 10 November 2026.

A 2018 BMW 6 Series Gran Coupe with the 3.0 diesel engine is typically advertised at £17,700: the median of the 21 for sale on AskCar, as of 10 November 2026.

Time on sale

This 2018 BMW 6 Series Gran Coupe has been on sale for at least 103 days.

Price history

AskCar first saw this advert on 30 July 2026 at £18,935. Its asking price is now £17,730, £1,205 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 30 July 2026: £18,935
• 27 October 2026: £18,190
• 31 October 2026: £17,865
• 3 November 2026: £17,730

Mileage and MOT

Advertised mileage is about 500 miles lower than the median mileage of a 2018 BMW 6 Series Gran Coupe on AskCar.

Similar cars

20 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 10 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 60,700 miles. Price: £18,495, £765 more than this car. Dealer: BM Automotive (Sw) in Saltash. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-467be055952f
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, blue. Mileage: 60,940 miles. Price: £22,000, £4,270 more than this car. Dealer: Sam Jordan Cars in Stanningfield. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-5cbccdd5f07d
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 61,147 miles. Price: £19,995, £2,265 more than this car. Dealer: Essex Cars in Colchester. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-91f8ec35a84a

• The nearest: 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, multicolour, 104 miles from this car. Mileage: 67,211 miles. Price: £17,500, £230 less than this car. Dealer: Scottish Motor Services in Glasgow. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-7d90bf994f88