2021 BMW 3 Series 2.0 320d M Sport

Overview

• Make: BMW
• Model: 3 Series
• Trim: M Sport
• Version: 2.0 320d M Sport Auto RWD Euro 6 4dr (187 bhp)
• Year: 2021
• Mileage: 40,000 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 139 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 40,000 miles, this 2021 BMW 3 Series M Sport has covered about 15,000 fewer miles than other 2021 BMW 3 Series cars. The dealer is asking £21,975, which is £1,267 below the AskCar estimate of £23,242. To work out the AskCar estimate, we analyse UK dealer adverts for 6,742 BMW 3 Series cars across different ages and specifications. This car was first seen in our listings data today. 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 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,267 (5%) under the AskCar estimate of £23,242.

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 6,742 priced BMW 3 Series adverts across different ages and specifications, as of 2 November 2026.

Time on sale

AskCar first saw this 2021 BMW 3 Series advertised today. About half of 2021 BMW 3 Series cars are gone from sale within a month of being advertised: 394 of the 846 first advertised between 10 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 2 November 2026 at £21,975. 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 2 November 2026: valid until 6 September 2027.

It has had 4 MOTs. The latest, on 7 September 2026, passed.

Advisories at the latest test: front brake disc worn, pitted or scored, but not seriously weakened inner disc faces.

Mileage at that test: 39,050 miles, which matches the advertised 40,000 miles.

Advertised mileage is about 15,000 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.

Similar cars

60 other 2021 BMW 3 Series M Sport 2.0 diesel automatic saloons are for sale at UK dealers, from £13,500 to £25,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 2.0 diesel saloon, white. Mileage: 41,000 miles. Price: £24,995, £3,020 more than this car. Dealer: A C G Motors in Manchester. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-cc6202b2ebe0
• 2021 BMW 3 Series M Sport, 2.0 diesel saloon, white. Mileage: 41,999 miles. Price: £20,989, £986 less than this car. Dealer: Essex Prestige in Harlow. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-ca38751a2213
• 2021 BMW 3 Series M Sport, 2.0 diesel saloon, blue. Mileage: 37,996 miles. Price: £22,495, £520 more than this car. Dealer: Park's Motor Group Douglas Park BMW Hamilton in Hamilton. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-813d0c69ea4e

• The nearest: 2021 BMW 3 Series M Sport, 2.0 diesel saloon, black, under a mile from this car. Mileage: 83,092 miles. Price: £17,995, £3,980 less than this car. Dealer: Magna Motor Group in Warrington. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-8ddb171dcb59