2021 BMW X3 3.0 M40d MHT
Price: £35,480. Fair price: £1,916 (5%) over the AskCar estimate of £33,564, our expected asking price for this car from its model, age, mileage and specification, drawing on 3,033 priced BMW X3 adverts on AskCar as of 8 November 2026.
AskCar lists 3,134 used BMW X3 from 1,223 UK dealerships, as of 8 November 2026.
Overview
- Make: BMW
- Model: X3
- Version: 3.0 M40d MHT Auto 4WD Euro 6 5dr (335 bhp)
- Year: 2021
- Mileage: 57,947 miles
- Fuel: Diesel, mild hybrid
- Body: SUV, 5 doors, 5 seats
- Engine: 3.0 litres, 335 bhp
- Gearbox: Automatic
- Drive: Four-wheel drive
- Colour: Grey
- CO2: 182 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 BMW X3 is advertised with 57,947 miles, approximately 9,900 above the typical mileage for its age. Its asking price of £35,480 is £1,916 above the AskCar estimate of £33,564. The AskCar estimate uses UK dealer asking prices, including 3,033 BMW X3 adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 23 days ago, the asking price has dropped by £500. The government's MOT record matches its advertised mileage. You can find this car at Oakdene Collection in Alfreton. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 8 November 2026.
Price
Fair price: £1,916 (5%) over the AskCar estimate of £33,564.
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 3,033 priced BMW X3 adverts across different ages and specifications, as of 8 November 2026.
A 2021 BMW X3 with the 3.0 diesel engine is typically advertised at £32,000: the median of the 37 for sale on AskCar, as of 8 November 2026.
Time on sale
This 2021 BMW X3 has been on sale for at least 23 days.
Price history
AskCar first saw this advert on 16 October 2026 at £35,980. Its asking price is now £35,480, £500 less. The latest price cut was seen on 6 November 2026.
Price changes recorded:
- 16 October 2026: £35,980
- 23 October 2026: £35,940
- 31 October 2026: £35,880
- 6 November 2026: £35,480
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 23 September 2027.
It has had 4 MOTs. The latest, on 18 September 2026, passed.
Advisories at the latest test: front shock absorbers has light misting of oil both.
Mileage at that test: 57,490 miles, which matches the advertised 57,947 miles.
Advertised mileage is about 9,900 miles higher than the median mileage of a 2021 BMW X3 on AskCar.
Browse all BMW X3 cars for sale · 2021 BMW X3 price guide
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Photos
57 photos of this car are on its AskCar page.
As of 8 November 2026, AskCar lists 595,629 cars and vans from 12,891 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.