2018 BMW X6 3.0 40d M Sport

Overview

• Make: BMW
• Model: X6
• Trim: M Sport
• Version: 3.0 40d M Sport Auto 4WD Euro 6 (s/s) 5dr (309 bhp)
• Year: 2018
• Mileage: 77,000 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 165 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW X6 M Sport is advertised with 77,000 miles, approximately 13,900 above the typical mileage for its age. The dealer is asking £20,290, which is £128 below the AskCar estimate of £20,418. To work out the AskCar estimate, we analyse UK dealer adverts for 536 BMW X6 cars across different ages and specifications. The asking price is now £700 lower than when we first recorded the advert 38 days ago. We checked its advertised mileage against the government's MOT record, and they match. It is for sale at Fish Motors in Bolton. 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: £128 (under 1%) under the AskCar estimate of £20,418.

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 536 priced BMW X6 adverts across different ages and specifications, as of 2 November 2026.

A 2018 BMW X6 with the 3.0 diesel engine is typically advertised at £22,000: the median of the 52 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2018 BMW X6 has been on sale for at least 38 days.

Price history

AskCar first saw this advert on 25 September 2026 at £20,990. Its asking price is now £20,290, £700 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 25 September 2026: £20,990
• 21 October 2026: £20,490
• 28 October 2026: £20,290

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 29 July 2027.

It has had 6 MOTs. The latest, on 30 July 2026, passed.

Advisories at the latest test: eml light on dash; rear both worn on inner edge.

Mileage at that test: 74,258 miles, which matches the advertised 77,000 miles.

Advertised mileage is about 13,900 miles higher than the median mileage of a 2018 BMW X6 on AskCar.

Similar cars

31 other 2018 BMW X6 M Sport 3.0 diesel automatic SUVs are for sale at UK dealers, from £13,995 to £29,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW X6 M Sport, 3.0 diesel SUV, black. Mileage: 76,900 miles. Price: £21,389, £1,099 more than this car. Dealer: A6 Motors in Luton. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-c174b72c4856
• 2018 BMW X6 M Sport, 3.0 diesel SUV, white. Mileage: 76,400 miles. Price: £20,490, £200 more than this car. Dealer: Motorlanka in Stourbridge. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-43a9bdb899c6
• 2018 BMW X6 M Sport, 3.0 diesel SUV, black. Mileage: 78,940 miles. Price: £19,995, £295 less than this car. Dealer: Parkland Motors in Costock. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-5ca2d82b8549

• The nearest: 2018 BMW X6 M Sport, 3.0 diesel SUV, black, 21 miles from this car. Mileage: 63,124 miles. Price: £21,990, £1,700 more than this car. Dealer: Lloyd Colne BMW in Colne. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-1471cf71b0ff