2021 BMW 3 Series 2.0 320i M Sport

Overview

• Make: BMW
• Model: 3 Series
• Trim: M Sport
• Version: 2.0 320i M Sport Auto RWD Euro 6 (s/s) 4dr (181 bhp)
• Year: 2021
• Mileage: 42,440 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 146 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series M Sport is advertised with 42,440 miles, approximately 12,500 below the typical mileage for its age. The AskCar estimate for this car is £20,954. It is priced at £21,000, which is £46 above that estimate. The AskCar estimate draws on 6,652 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this car for sale 10 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Harold Wood BMW, based in Romford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 1 November 2026.

How we estimate prices and check cars

Price

Fair price: £46 (under 1%) over the AskCar estimate of £20,954.

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 6,652 priced BMW 3 Series adverts across different ages and specifications, as of 1 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 10 days.

Price history

AskCar first saw this advert on 22 October 2026 at £21,000. 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 1 November 2026: valid until 28 December 2026.

It has had 2 MOTs. The latest, on 29 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 42,102 miles, which matches the advertised 42,440 miles.

Advertised mileage is about 12,500 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.

Similar cars

150 other 2021 BMW 3 Series M Sport 2.0 petrol automatic saloons are for sale at UK dealers, from £14,000 to £26,950, as of 1 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey. Mileage: 42,455 miles. Price: £23,499, £2,499 more than this car. Dealer: Albans Motors in Hatfield. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-3ff59c7cd785
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue. Mileage: 42,558 miles. Price: £21,250, £250 more than this car. Dealer: Norwich Van Centre in Norwich. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-bef621b969da
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue. Mileage: 42,772 miles. Price: £20,490, £510 less than this car. Dealer: Lloyd Colne BMW in Colne. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-29e51ca83ee4

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue, 2 miles from this car. Mileage: 72,595 miles. Price: £17,350, £3,650 less than this car. Dealer: SKV Motors in Romford. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-57a338fb67b5