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: 40,135 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: White
• CO2: 146 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series M Sport has covered 40,135 miles, around 14,700 fewer miles than is typical for its age. Priced at £20,350, it is advertised £896 below the AskCar estimate of £21,246. 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. This car was first seen in our listings data 15 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. You can find this car at Car Planet Watford in Rickmansworth. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £896 (4%) under the AskCar estimate of £21,246.

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.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 15 days.

Price history

AskCar first saw this advert on 21 October 2026 at £20,350. 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 5 November 2026: valid until 27 November 2026.

It has had 3 MOTs. The latest, on 27 November 2025, passed.

Advisories at the latest test: offside front windscreen damaged but not adversely affecting driver's view.

Mileage at that test: 32,182 miles, which matches the advertised 40,135 miles.

Advertised mileage is about 14,700 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.

Similar cars

146 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 5 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue. Mileage: 39,637 miles. Price: £22,799, £2,449 more than this car. Dealer: Motorpoint Derby in Derby. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-973459fcda58
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, white. Mileage: 41,212 miles. Price: £19,995, £355 less than this car. Dealer: Wilsons Motor Group in Ewell. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-a3790ffd14be
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey. Mileage: 41,312 miles. Price: £21,499, £1,149 more than this car. Dealer: Charles Hurst CUPRA Belfast in Belfast. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-03553b405d24

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey, 8 miles from this car. Mileage: 24,255 miles. Price: £25,975, £5,625 more than this car. Dealer: Group 1 Borehamwood BMW in Borehamwood. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-4239e558525b