2021 BMW 3 Series 2.0 318i M Sport

Overview

• Make: BMW
• Model: 3 Series
• Trim: M Sport
• Version: 2.0 318i M Sport Auto RWD Euro 6 (s/s) 4dr (154 bhp)
• Year: 2021
• Mileage: 51,581 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 154 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 146 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 51,581 miles on the clock, this 2021 BMW 3 Series M Sport has done roughly 3,300 fewer miles than a typical 2021 BMW 3 Series. Priced at £18,325, it is advertised £498 below the AskCar estimate of £18,823. The AskCar estimate draws on 6,897 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this advert 26 days ago, and its asking price has since fallen by £625. MOT records show an expiry date of 15 May 2027. 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: £498 (2%) under the AskCar estimate of £18,823.

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 26 days.

Price history

AskCar first saw this advert on 10 October 2026 at £18,950. Its asking price is now £18,325, £625 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 10 October 2026: £18,950
• 13 October 2026: £18,850
• 22 October 2026: £18,750
• 27 October 2026: £18,325

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 15 May 2027.

Advertised mileage is about 3,300 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, black. Mileage: 51,678 miles. Price: £19,990, £1,665 more than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-d6c46f7e87be
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey. Mileage: 51,700 miles. Price: £19,990, £1,665 more than this car. Dealer: S James Prestige in Essendine. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-1cf346fd03dc
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, black. Mileage: 51,848 miles. Price: £21,500, £3,175 more than this car. Dealer: Sytner Leicester BMW in Leicester. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-f42cdc6218b7