2018 BMW 6 Series Gran Turismo 3.0 640i M Sport

Overview

• Make: BMW
• Model: 6 Series Gran Turismo
• Trim: M Sport
• Version: 3.0 640i M Sport Auto 4WD Euro 6 (s/s) 5dr GT (335 bhp)
• Year: 2018
• Mileage: 46,587 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 187 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 46,587 miles on the clock, this 2018 BMW 6 Series Gran Turismo M Sport has done roughly 28,700 fewer miles than a typical 2018 BMW 6 Series Gran Turismo. The dealer is asking £24,490, which is £1,132 above the AskCar estimate of £23,358. To work out the AskCar estimate, we analyse UK dealer adverts for 80 BMW 6 Series Gran Turismo cars across different ages and specifications. It first appeared in our advert records 52 days ago. Its advertised mileage matches the government's MOT record. It is advertised by AS Cars (UK) in Dunstable. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,132 (4%) over the AskCar estimate of £23,358.

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 80 priced BMW 6 Series Gran Turismo adverts across different ages and specifications, as of 2 November 2026.

A 2018 BMW 6 Series Gran Turismo with the 3.0 petrol engine is typically advertised at £16,700: the median of the 22 for sale on AskCar, as of 2 November 2026.

Time on sale

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

Price history

AskCar first saw this advert on 11 September 2026 at £24,490. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 22 January 2027.

It has had 6 MOTs. The latest, on 13 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 45,077 miles, which matches the advertised 46,587 miles.

Advertised mileage is about 28,700 miles lower than the median mileage of a 2018 BMW 6 Series Gran Turismo on AskCar.