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: 10,000 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Silver
• CO2: 165 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2018 BMW X6 M Sport is 10,000 miles. Its asking price of £21,990 is £6,237 below the AskCar estimate of £28,227. 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 £2,000 lower than when we first recorded the advert 158 days ago. Ask the dealer why the advert shows fewer miles than the 69,489 recorded at the latest MOT. Its MOT is recorded as valid until 7 December 2026. It is advertised by Sleaford Car Centre in Peterborough. 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

Good value: £6,237 (22%) under the AskCar estimate of £28,227.

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 158 days.

Price history

AskCar first saw this advert on 28 May 2026 at £23,990. Its asking price is now £21,990, £2,000 less. The latest price cut was seen on 25 October 2026.

Price changes recorded:

• 28 May 2026: £23,990
• 25 October 2026: £21,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 7 December 2026.

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

There were no advisories at the latest test.

Mileage at that test: 69,489 miles. The advert says 10,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 53,100 miles lower 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: 33,000 miles. Price: £24,995, £3,005 more than this car. Dealer: Alan Tully Cars in Nottingham. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-8a0273b0d3a2
• 2018 BMW X6 M Sport, 3.0 diesel SUV, white. Mileage: 37,000 miles. Price: £29,995, £8,005 more than this car. Dealer: Storm Commercials in Barnsley. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-68a679d34191
• 2018 BMW X6 M Sport, 3.0 diesel SUV, grey. Mileage: 46,036 miles. Price: £23,190, £1,200 more than this car. Dealer: Stratstone BMW Bury St Edmunds in Bury St Edmunds. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-3920976aec9a

• The nearest: 2018 BMW X6 M Sport, 3.0 diesel SUV, grey, 40 miles from this car. Mileage: 72,567 miles. Price: £20,495, £1,495 less than this car. Dealer: Hampton Car Sales in Milton Malsor. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-11090ea037aa