2021 BMW X6 3.0 40d MHT M Sport

Overview

• Make: BMW
• Model: X6
• Trim: M Sport
• Version: 3.0 40d MHT M Sport Auto 4WD Euro 6 (s/s) 5dr (335 bhp)
• Year: 2021
• Mileage: 46,000 miles
• Fuel: Diesel, mild hybrid
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 185 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW X6 M Sport has covered 46,000 miles. The AskCar estimate for this car is £41,690. It is priced at £37,650, which is £4,040 below that estimate. The AskCar estimate draws on 547 BMW X6 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. Since we first spotted the advert 161 days ago, the asking price has dropped by £2,300. Our records show an MOT expiry date of 28 August 2026, which has passed. Ask the dealer for an update. According to the government's MOT record, its advertised mileage is consistent with the latest test. You can find this car at Autoscout 48 in Dacorum. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Good value: £4,040 (9%) under the AskCar estimate of £41,690.

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 547 priced BMW X6 adverts across different ages and specifications, as of 5 November 2026.

A 2021 BMW X6 with the 3.0 diesel engine is typically advertised at £37,900: the median of the 40 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2021 BMW X6 has been on sale for at least 161 days.

Price history

AskCar first saw this advert on 28 May 2026 at £39,950. Its asking price is now £37,650, £2,300 less. The latest price cut was seen on 23 October 2026.

Price changes recorded:

• 28 May 2026: £39,950
• 21 June 2026: £39,485
• 27 August 2026: £39,325
• 1 September 2026: £37,995
• 30 September 2026: £37,795
• 23 October 2026: £37,495
• 5 November 2026: £37,650

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: the latest record we hold ran out on 28 August 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 29 August 2025, passed.

Advisories at the latest test: nearside front tyre has a cut but not deep enough to reach the ply or cords.

Mileage at that test: 39,632 miles, which matches the advertised 46,000 miles.

Advertised mileage is about 1,400 miles lower than the median mileage of a 2021 BMW X6 on AskCar.

Similar cars

31 other 2021 BMW X6 M Sport 3.0 diesel automatic SUVs are for sale at UK dealers, from £29,999 to £43,500, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW X6 M Sport, 3.0 diesel SUV, grey. Mileage: 46,450 miles. Price: £35,400, £2,250 less than this car. Dealer: Sytner Select Nottingham in Nottingham. AskCar page: https://askcar.co.uk/car/bmw-x6-2021-ffec2b6aab47
• 2021 BMW X6 M Sport, 3.0 diesel SUV, black. Mileage: 46,701 miles. Price: £36,480, £1,170 less than this car. Dealer: Phantom Motor Company in Hindley Green. AskCar page: https://askcar.co.uk/car/bmw-x6-2021-191f77543b90
• 2021 BMW X6 M Sport, 3.0 diesel SUV, blue. Mileage: 47,400 miles. Price: £38,489, £839 more than this car. Dealer: A6 Motors in Luton. AskCar page: https://askcar.co.uk/car/bmw-x6-2021-7b6747230280

• The nearest: 2021 BMW X6 M Sport, 3.0 diesel SUV, black, 8 miles from this car. Mileage: 60,000 miles. Price: £39,995, £2,345 more than this car. Dealer: AH Specialist Cars in Watford. AskCar page: https://askcar.co.uk/car/bmw-x6-2021-d605dfa56e8f