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: 54,646 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

With 54,646 miles on the clock, this 2018 BMW X6 M Sport has done roughly 8,500 fewer miles than a typical 2018 BMW X6. The AskCar estimate for this car is £23,371. It is priced at £21,200, which is £2,171 below that estimate. The AskCar estimate uses UK dealer asking prices, including 536 BMW X6 adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 127 days ago. Its asking price has since fallen by £3,050. The government's MOT record matches its advertised mileage. You can find this car at Car Planet Watford in Rickmansworth. 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: £2,171 (9%) under the AskCar estimate of £23,371.

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 127 days.

Price history

AskCar first saw this advert on 28 June 2026 at £24,250. Its asking price is now £21,200, £3,050 less. The latest price cut was seen on 1 November 2026.

Price changes recorded:

• 28 June 2026: £24,250
• 20 July 2026: £23,950
• 28 July 2026: £23,650
• 3 August 2026: £23,400
• 10 August 2026: £23,350
• 18 August 2026: £23,300
• 25 August 2026: £23,200
• 1 September 2026: £23,100
• 8 September 2026: £22,950
• 15 September 2026: £23,000
• 30 September 2026: £22,700
• 7 October 2026: £22,400
• 12 October 2026: £22,100
• 19 October 2026: £21,800
• 26 October 2026: £21,500
• 1 November 2026: £21,200

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 June 2027.

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

There were no advisories at the latest test.

Mileage at that test: 54,732 miles, which matches the advertised 54,646 miles.

Advertised mileage is about 8,500 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, red. Mileage: 53,450 miles. Price: £22,490, £1,290 more than this car. Dealer: Hanar Cars (UK) in Hoddesdon. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-9c9a936f29b4
• 2018 BMW X6 M Sport, 3.0 diesel SUV, black. Mileage: 52,302 miles. Price: £23,299, £2,099 more than this car. Dealer: Pine Lodge Cars in Whitchurch. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-b4d127f5d27b
• 2018 BMW X6 M Sport, 3.0 diesel SUV, white. Mileage: 52,000 miles. Price: £23,995, £2,795 more than this car. Dealer: RWD Motor Group in Ossett. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-13659c5f22a7

• The nearest: 2018 BMW X6 M Sport, 3.0 diesel SUV, white, 8 miles from this car. Mileage: 84,610 miles. Price: £19,850, £1,350 less than this car. Dealer: Parkside Motors in Edgware. AskCar page: https://askcar.co.uk/car/bmw-x6-2018-331b3ac14e91