2021 BMW X3 3.0 M40d MHT
Price: £28,150. Fair price: £1,906 (6%) under the AskCar estimate of £30,056, our expected asking price for this car from its model, age, mileage and specification, drawing on 3,049 priced BMW X3 adverts on AskCar as of 12 November 2026.
AskCar lists 3,124 used BMW X3 from 1,234 UK dealerships, as of 12 November 2026.
Overview
- Make: BMW
- Model: X3
- Version: 3.0 M40d MHT Auto 4WD Euro 6 5dr (335 bhp)
- Year: 2021
- Mileage: 71,882 miles
- Fuel: Diesel, mild hybrid
- Body: SUV, 5 doors, 5 seats
- Engine: 3.0 litres, 335 bhp
- Gearbox: Automatic
- Drive: Four-wheel drive
- Colour: Blue
- CO2: 180 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
With 71,882 miles on the clock, this 2021 BMW X3 has done roughly 24,000 more miles than a typical 2021 BMW X3. Its asking price of £28,150 is £1,906 below the AskCar estimate of £30,056. The AskCar estimate uses UK dealer asking prices, including 3,049 BMW X3 adverts, and accounts for the car’s age, mileage and specification. This car was first seen in our listings data today. The government's MOT record matches its advertised mileage. It is advertised by Car Planet Watford in Rickmansworth. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 12 November 2026.
Car Planet Watford is rated 4.6 out of 5 on Google.
Price
Fair price: £1,906 (6%) under the AskCar estimate of £30,056.
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 3,049 priced BMW X3 adverts across different ages and specifications, as of 12 November 2026.
A 2021 BMW X3 with the 3.0 diesel engine is typically advertised at £31,100: the median of the 38 for sale on AskCar, as of 12 November 2026.
Time on sale
AskCar first saw this 2021 BMW X3 advertised today. About half of 2021 BMW X3 cars are gone from sale within a month of being advertised: 154 of the 334 first advertised between 13 July 2026 and 9 October 2026.
Price history
AskCar first saw this advert on 12 November 2026 at £28,150. Its asking price has not changed.
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 12 November 2026: valid until 27 June 2027.
It has had 4 MOTs. The latest, on 17 June 2026, passed.
Advisories at the latest test: nearside front tyre worn close to legal limit/worn on edge tyre 3mm; offside front tyre worn close to legal limit/worn on edge tyre 3mm.
Mileage at that test: 70,352 miles, which matches the advertised 71,882 miles.
Advertised mileage is about 24,000 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
4 photos of this car are on its AskCar page.
As of 12 November 2026, AskCar lists 596,362 cars and vans from 12,840 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.