2018 BMW 6 Series Gran Coupe

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

£16,400

Fair price: within 8% of the typical £16,447 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: 83,433 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 is advertised with 83,433 miles, approximately 22,600 above the typical mileage for its age. The dealer is asking £16,400, which is £47 below our market estimate of £16,447. 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 £580. That history is worth bearing in mind when speaking to the dealer. Its recorded MOT is valid until 19 May 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is CMC Automotive, based in Stockport.

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: £580 from the first recorded £16,980. 1 price reduction recorded, the latest observed on 20 August 2026.

Recorded asking prices
Date observed	Asking price
29 May 2026	£16,980
7 July 2026	£16,980
20 August 2026	£16,400
23 October 2026	£16,400

Price and mileage comparison

Estimated market asking price: £16,447. The asking price is £47 below 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 22,600 miles higher than typical for a 2018 BMW 6 Series Gran Coupe.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 19 May 2027. 83,465 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
£16,500	86,833 miles
£16,995	82,568 miles
£17,190	76,237 miles
£17,299	62,612 miles

These cars have covered 8,000–86,833 miles, compared with 83,433 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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