2018 BMW 6 Series

3.0 640d M Sport Auto RWD Euro 6 (s/s) 2dr (309 bhp)

£21,495

Fair price: within 8% of the typical £21,430 for this model, age and mileage, drawing on 147 adverts of this make and model.

Overview

Make: BMW
Model: 6 Series
Trim: M SPORT
Version: 3.0 640d M Sport Auto RWD Euro 6 (s/s) 2dr (309 bhp)
Mileage: 51,000 miles
Year: 2018
Fuel type: Diesel
Body type: Coupe
Engine: 3.0 L
Gearbox: Automatic
Power: 309 bhp
Seats: 4
CO2: 147 g/km
Colour: Black
Doors: 2
Driven wheels: Rear Wheel Drive
Engine badge: 640d
Emissions standard: Euro 6

About this car

At 51,000 miles, this 2018 BMW 6 Series M Sport has covered about 4,700 more miles than other 2018 BMW 6 Series cars. The dealer is asking £21,495, which is £65 above our market estimate of £21,430. Our estimate draws on 147 BMW 6 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 116 days ago. The seller is Charles Prestige, based in Carterton.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 1 July 2026, 116 days ago. Advert duration calculated on 25 October 2026.

Recorded asking prices
Date observed	Asking price
1 July 2026	£21,495
10 July 2026	£21,495
23 October 2026	£21,495

Price and mileage comparison

Estimated market asking price: £21,430. The asking price is £65 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 147 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 4,700 miles higher than typical for a 2018 BMW 6 Series.

6 other cars with the same year, trim, gearbox and fuel are for sale from £18,500 to £29,495.

Other matching cars (up to five, cheapest first)
Asking price	Mileage
£18,500	57,000 miles
£18,995	63,700 miles
£21,695	47,000 miles
£22,495	71,000 miles
£25,995	26,734 miles

These cars have covered 10,190–71,000 miles, compared with 51,000 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 cars for sale · 2018 BMW 6 Series price guide

Vehicle photos

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