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: 20,565 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

With 20,565 miles on the clock, this 2021 BMW 3 Series M Sport has done roughly 34,300 fewer miles than a typical 2021 BMW 3 Series. The dealer is asking £22,000, which is £1,635 below the AskCar estimate of £23,635. To work out the AskCar estimate, we analyse UK dealer adverts for 6,897 BMW 3 Series cars across different ages and specifications. It first appeared in our advert records 23 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Cardiff BMW, based in Cardiff. 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: £1,635 (6%) under the AskCar estimate of £23,635.

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 23 days.

Price history

AskCar first saw this advert on 13 October 2026 at £22,000. 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 5 November 2026: valid until 28 May 2027.

It has had 4 MOTs. The latest, on 19 May 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 20,049 miles, which matches the advertised 20,565 miles.

Advertised mileage is about 34,300 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: 20,400 miles. Price: £23,990, £1,990 more than this car. Dealer: Colin Bryan T/A CB Autosales in Kirkcaldy. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-3dd19b655cf3
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, black. Mileage: 19,786 miles. Price: £24,000, £2,000 more than this car. Dealer: Sytner High Wycombe BMW in High Wycombe. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-5a3c70a28591
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey. Mileage: 22,600 miles. Price: £25,490, £3,490 more than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-ceeafb001830

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue, under a mile from this car. Mileage: 70,370 miles. Price: £19,250, £2,750 less than this car. Dealer: Sytner Cardiff BMW in Cardiff. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-0308fdaa6b61