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: 34,100 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 146 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 34,100 miles, this 2021 BMW 3 Series M Sport has covered about 20,700 fewer miles than other 2021 BMW 3 Series cars. The dealer is asking £21,950, which is £74 below the AskCar estimate of £22,024. To work out the AskCar estimate, we analyse UK dealer adverts for 6,897 BMW 3 Series cars across different ages and specifications. The asking price is now £500 lower than when we first recorded the advert 27 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by M B Cars London in St. Albans. 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: £74 (under 1%) under the AskCar estimate of £22,024.

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 27 days.

Price history

AskCar first saw this advert on 9 October 2026 at £22,450. Its asking price is now £21,950, £500 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

• 9 October 2026: £22,450
• 5 November 2026: £21,950

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 6 November 2026.

It failed its MOT on 1 November 2025 (nearside rear tyre tread depth below requirements of 1.6mm; offside rear tyre tread depth below requirements of 1.6mm; rear brake pad(s) less than 1.5 mm thick) and passed 6 days later, on 7 November 2025.

Advisories at the latest test: nearside rear brake disc worn, but not excessively; offside rear brake disc worn, but not excessively.

Mileage at that test: 29,410 miles, which matches the advertised 34,100 miles.

Advertised mileage is about 20,700 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, grey. Mileage: 34,278 miles. Price: £21,199, £751 less than this car. Dealer: Motorpoint Oldbury in Oldbury. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-fee4b6de3163
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, white. Mileage: 34,300 miles. Price: £21,250, £700 less than this car. Dealer: S James Prestige in Essendine. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-05fc549b938f
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, white. Mileage: 34,314 miles. Price: £20,799, £1,151 less than this car. Dealer: Motorpoint Newport in Newport. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-e96c45f510e7

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol saloon, black, under a mile from this car. Mileage: 54,716 miles. Price: £20,950, £1,000 less than this car. Dealer: M B Cars London in St Albans. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-bf0142c99315