2021 BMW 3 Series 3.0 M340d MHT
Price: £25,870. Good value: £2,945 (10%) under the AskCar estimate of £28,815, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,897 priced BMW 3 Series adverts on AskCar as of 5 November 2026.
AskCar lists 7,194 used BMW 3 Series from 2,714 UK dealerships, as of 5 November 2026.
Overview
- Make: BMW
- Model: 3 Series
- Version: 3.0 M340d MHT Auto 4WD Euro 6 (s/s) 4dr (335 bhp)
- Year: 2021
- Mileage: 46,548 miles
- Fuel: Diesel, mild hybrid
- Body: Saloon, 4 doors, 5 seats
- Engine: 3.0 litres, 335 bhp
- Gearbox: Automatic
- Drive: Four-wheel drive
- Colour: Grey
- CO2: 160 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
With 46,548 miles on the clock, this 2021 BMW 3 Series has done roughly 8,300 fewer miles than a typical 2021 BMW 3 Series. Priced at £25,870, it is advertised £2,945 below the AskCar estimate of £28,815. The AskCar estimate uses UK dealer asking prices, including 6,897 BMW 3 Series adverts, and accounts for the car’s age, mileage and specification. We first recorded this advert 21 days ago, and its asking price has since fallen by £670. The government's MOT record matches its advertised mileage. You can find this car at Evans Halshaw BYD Birmingham in Erdington. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 5 November 2026.
Price
Good value: £2,945 (10%) under the AskCar estimate of £28,815.
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 6,897 priced BMW 3 Series adverts across different ages and specifications, as of 5 November 2026.
A 2021 BMW 3 Series with the 3.0 diesel engine is typically advertised at £28,500: the median of the 144 for sale on AskCar, as of 5 November 2026.
Time on sale
This 2021 BMW 3 Series has been on sale for at least 21 days.
Price history
AskCar first saw this advert on 15 October 2026 at £26,540. Its asking price is now £25,870, £670 less. The latest price cut was seen on 28 October 2026.
Price changes recorded:
- 15 October 2026: £26,540
- 16 October 2026: £26,380
- 21 October 2026: £26,120
- 28 October 2026: £25,870
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 23 March 2027.
It has had 4 MOTs. The latest, on 19 March 2026, passed.
There were no advisories at the latest test.
Mileage at that test: 33,973 miles, which matches the advertised 46,548 miles.
Advertised mileage is about 8,300 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.
Browse all BMW 3 Series cars for sale · 2021 BMW 3 Series price guide
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Photos
19 photos of this car are on its AskCar page.
As of 5 November 2026, AskCar lists 595,776 cars and vans from 12,945 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.