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: 78,946 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: White
• CO2: 165 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW X6 M Sport has covered 78,946 miles, around 15,800 more miles than is typical for its age. Its asking price of £18,995 is £1,168 below the AskCar estimate of £20,163. The AskCar estimate uses 536 UK dealer adverts for the BMW X6, with adjustments for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 104 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is JCT600 Doncaster Audi, based in Doncaster. 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: £1,168 (5%) under the AskCar estimate of £20,163.

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 104 days.

Price history

AskCar first saw this advert on 21 July 2026 at £21,180. Its asking price is now £18,995, £2,185 less.

Price changes recorded:

• 23 July 2026: £21,180
• 25 July 2026: £20,333
• 27 July 2026: £20,995
• 29 July 2026: £20,259
• 13 August 2026: £20,000
• 25 August 2026: £19,895
• 8 September 2026: £19,830
• 16 September 2026: £19,434
• 23 September 2026: £19,433
• 2 October 2026: £19,460
• 9 October 2026: £19,395
• 18 October 2026: £19,250
• 23 October 2026: £19,200
• 30 October 2026: £18,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 10 December 2026.

It has had 8 MOTs. The latest, on 5 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 69,513 miles, which matches the advertised 78,946 miles.

Advertised mileage is about 15,800 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: 78,940 miles. Price: £19,995, £1,000 more than this car. Dealer: Parkland Motors in Costock. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-5ca2d82b8549
• 2018 BMW X6 M Sport, 3.0 diesel SUV, white. Mileage: 80,000 miles. Price: £20,995, £2,000 more than this car. Dealer: CarPlex in Hailsham. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-da7170bf0af9
• 2018 BMW X6 M Sport, 3.0 diesel SUV, black. Mileage: 80,600 miles. Price: £22,495, £3,500 more than this car. Dealer: Charles Prestige in Carterton. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-b8bee5c45b7a

• The nearest: 2018 BMW X6 M Sport, 3.0 diesel SUV, white, 16 miles from this car. Mileage: 37,000 miles. Price: £29,995, £11,000 more than this car. Dealer: Storm Commercials in Barnsley. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-68a679d34191