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: 50,512 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 154 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 146 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series M Sport has covered 50,512 miles, around 4,600 fewer miles than is typical for its age. The dealer is asking £19,995, which is £963 above the AskCar estimate of £19,032. To work out the AskCar estimate, we analyse UK dealer adverts for 6,862 BMW 3 Series cars across different ages and specifications. Since we first spotted the advert 28 days ago, the asking price has dropped by £500. We checked its advertised mileage against the government's MOT record, and they match. The seller is Group 1 Hailsham BMW, based in Hailsham. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £963 (5%) over the AskCar estimate of £19,032.

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 6,862 priced BMW 3 Series adverts across different ages and specifications, as of 4 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 28 days.

Price history

AskCar first saw this advert on 7 October 2026 at £20,495. Its asking price is now £19,995, £500 less. The latest price cut was seen on 25 October 2026.

Price changes recorded:

• 7 October 2026: £20,495
• 11 October 2026: £20,490
• 16 October 2026: £20,195
• 25 October 2026: £19,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 23 September 2027.

It has had 3 MOTs. The latest, on 22 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 50,351 miles, which matches the advertised 50,512 miles.

Advertised mileage is about 4,600 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 4 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey. Mileage: 50,631 miles. Price: £22,390, £2,395 more than this car. Dealer: MINI UK at Stratstone Hull in Kingston upon Hull. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-adea1589ef83
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue. Mileage: 50,948 miles. Price: £23,000, £3,005 more than this car. Dealer: Sytner High Wycombe BMW in High Wycombe. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-4f09b36cb499
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue. Mileage: 51,581 miles. Price: £18,325, £1,670 less than this car. Dealer: Grange. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-5712d3a146bb

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol saloon, white, 23 miles from this car. Mileage: 34,884 miles. Price: £21,495, £1,500 more than this car. Dealer: Skinners Of Rye in Rye. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-6b14e1d20ad7