2021 BMW 3 Series 3.0 M340i MHT
Price: £34,975. Fair price: £177 (under 1%) under the AskCar estimate of £35,152, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,886 priced BMW 3 Series adverts on AskCar as of 7 November 2026.
AskCar lists 7,202 used BMW 3 Series from 2,724 UK dealerships, as of 7 November 2026.
Overview
- Make: BMW
- Model: 3 Series
- Version: 3.0 M340i MHT Auto 4WD Euro 6 (s/s) 4dr (369 bhp)
- Year: 2021
- Mileage: 26,900 miles
- Fuel: Petrol, mild hybrid
- Body: Saloon, 4 doors, 5 seats
- Engine: 3.0 litres, 369 bhp
- Gearbox: Automatic
- Drive: Four-wheel drive
- Colour: Grey
- CO2: 176 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 BMW 3 Series is advertised with 26,900 miles, approximately 28,200 below the typical mileage for its age. The AskCar estimate for this car is £35,152. It is priced at £34,975, which is £177 below that estimate. The AskCar estimate draws on 6,886 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We have tracked this advert for 66 days. The government's MOT record matches its advertised mileage. You can find this car at Cottrell Motor Co in Warrington. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 7 November 2026.
Price
Fair price: £177 (under 1%) under the AskCar estimate of £35,152.
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 6,886 priced BMW 3 Series adverts across different ages and specifications, as of 7 November 2026.
A 2021 BMW 3 Series with the 3.0 petrol engine is typically advertised at £28,300: the median of the 148 for sale on AskCar, as of 7 November 2026.
Time on sale
This 2021 BMW 3 Series has been on sale for at least 66 days.
Price history
AskCar first saw this advert on 2 September 2026 at £34,975. 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 7 November 2026: valid until 6 September 2027.
It has had 4 MOTs. The latest, on 25 August 2026, passed.
Advisories at the latest test: TPMS light on dash; nearside rear tyre worn close to legal limit/worn on edge 3mm.
Mileage at that test: 26,722 miles, which matches the advertised 26,900 miles.
Advertised mileage is about 28,200 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
76 photos of this car are on its AskCar page.
As of 7 November 2026, AskCar lists 601,018 cars and vans from 12,892 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.