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: 50,003 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 is advertised with 50,003 miles, approximately 10,700 below the typical mileage for its age. The dealer is asking £19,995, which is £319 below the AskCar estimate of £20,314. To work out the AskCar estimate, we analyse UK dealer adverts for 111 BMW 6 Series Gran Coupe cars across different ages and specifications. We first recorded this advert 125 days ago, and its asking price has since fallen by £1,500. The government's MOT record matches its advertised mileage. It is for sale at Essex Cars in Colchester. 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: £319 (1%) under the AskCar estimate of £20,314.

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 125 days.

Price history

AskCar first saw this advert on 4 July 2026 at £21,495. Its asking price is now £19,995, £1,500 less. The latest price cut was seen on 5 October 2026.

Price changes recorded:

• 4 July 2026: £21,495
• 24 July 2026: £20,995
• 13 August 2026: £20,495
• 5 October 2026: £19,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 15 February 2027.

It has had 7 MOTs. The latest, on 16 February 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 40,512 miles, which matches the advertised 50,003 miles.

Advertised mileage is about 10,700 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, blue. Mileage: 53,125 miles. Price: £18,989, £1,006 less than this car. Dealer: A6 Motors in Luton. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-94fb4edc3bb1
• 2018 BMW 6 Series Gran Coupe M Sport, 3.0 diesel saloon, black. Mileage: 60,000 miles. Price: £20,495, £500 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, £1,000 more than this car. Dealer: AM Autohaus in Slough. AskCar page: https://askcar.co.uk/car/bmw-6-series-gran-coupe-2018-c0afc08c8950