2018 BMW 6 Series Gran Coupe

3.0 640d M Sport Auto RWD Euro 6 (s/s) 4dr (309 bhp)

£20,995

Fair price: within 8% of the typical £19,463 for this model, age and mileage, drawing on 104 adverts of this make and model.

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)
Mileage: 60,000 miles
Year: 2018
Fuel type: Diesel
Body type: Saloon
Engine: 3.0 L
Gearbox: Automatic
Power: 309 bhp
Seats: 5
CO2: 152 g/km
Colour: Black
Doors: 4
Driven wheels: Rear Wheel Drive
Engine badge: 640d
Emissions standard: Euro 6

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 £1,532 above our market estimate of £19,463. We use UK dealer asking prices, including 104 BMW 6 Series Gran Coupe listings, and account for the car’s age, mileage and specification. Since we first spotted the advert 151 days ago, the asking price has dropped 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.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 28 May 2026, 151 days ago. Advert duration calculated on 26 October 2026. Net asking-price reduction: £1,000 from the first recorded £21,995. 1 price reduction recorded, the latest observed on 13 August 2026.

Recorded asking prices
Date observed	Asking price
28 May 2026	£21,995
6 July 2026	£21,995
13 August 2026	£20,995
23 October 2026	£20,995

Price and mileage comparison

Estimated market asking price: £19,463. The asking price is £1,532 above this estimate.

The estimate uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It estimates an advertised price, not a confirmed sale price.

The pricing calculation includes 104 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 800 miles lower than typical for a 2018 BMW 6 Series Gran Coupe.

Mileage concern: the advertised mileage is below the last MOT reading; ask the dealer to explain.

MOT

MOT valid until 28 April 2027. 61,105 miles at the last test.

15 other cars with the same year, trim, gearbox and fuel are for sale from £15,495 to £27,995.

Other matching cars (up to five, cheapest first)
Asking price	Mileage
£15,495	86,000 miles
£16,400	83,433 miles
£16,500	86,833 miles
£16,995	82,568 miles
£17,190	76,237 miles

These cars have covered 8,000–86,833 miles, compared with 60,000 miles for this car.

Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. Our estimate adjusts for these differences using the wider market data.

Browse all BMW 6 Series Gran Coupe cars for sale · 2018 BMW 6 Series Gran Coupe price guide

Vehicle photos

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