2021 BMW 3 Series 3.0 M340d MHT
Price: £33,000. Fair price: £2,607 (7%) under the AskCar estimate of £35,607, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,862 priced BMW 3 Series adverts on AskCar as of 4 November 2026.
AskCar lists 7,147 used BMW 3 Series from 2,707 UK dealerships, as of 4 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: 8,500 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 8,500 miles on the clock, this 2021 BMW 3 Series has done roughly 46,700 fewer miles than a typical 2021 BMW 3 Series. Its asking price of £33,000 is £2,607 below the AskCar estimate of £35,607. The AskCar estimate uses 6,862 UK dealer adverts for the BMW 3 Series, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 126 days ago. Its asking price has since fallen by £999. You can find this car at Alliance Motors Uk in West Bromwich. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £2,607 (7%) under the AskCar estimate of £35,607.
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 6,862 priced BMW 3 Series adverts across different ages and specifications, as of 4 November 2026.
A 2021 BMW 3 Series with the 3.0 diesel engine is typically advertised at £28,500: the median of the 142 for sale on AskCar, as of 4 November 2026.
Time on sale
This 2021 BMW 3 Series has been on sale for at least 126 days.
Price history
AskCar first saw this advert on 1 July 2026 at £33,999. Its asking price is now £33,000, £999 less. The latest price cut was seen on 25 September 2026.
Price changes recorded:
- 1 July 2026: £33,999
- 25 September 2026: £33,000
Mileage and MOT
Advertised mileage is about 46,700 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
More like this
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- Used diesel BMW 3 Series for sale
- Used BMW 3 Series for sale near Birmingham
Photos
51 photos of this car are on its AskCar page.
As of 4 November 2026, AskCar lists 592,552 cars and vans from 12,964 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.