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: 31,866 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 154 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 146 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series M Sport has covered 31,866 miles, around 23,100 fewer miles than is typical for its age. The dealer is asking £19,640, which is £1,669 below the AskCar estimate of £21,309. To work out the AskCar estimate, we analyse UK dealer adverts for 6,742 BMW 3 Series cars across different ages and specifications. Since we first spotted the advert 59 days ago, the asking price has dropped by £490. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Evans Halshaw Vauxhall Kilmarnock, based in Kilmarnock. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,669 (7%) under the AskCar estimate of £21,309.

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 6,742 priced BMW 3 Series adverts across different ages and specifications, as of 2 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 59 days.

Price history

AskCar first saw this advert on 4 September 2026 at £20,130. Its asking price is now £19,640, £490 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 4 September 2026: £20,130
• 8 September 2026: £19,980
• 16 September 2026: £20,360
• 22 September 2026: £20,140
• 29 September 2026: £19,720
• 27 October 2026: £19,640

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 30 March 2027.

It has had 3 MOTs. The latest, on 18 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 29,049 miles, which matches the advertised 31,866 miles.

Advertised mileage is about 23,100 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 2 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, white. Mileage: 31,500 miles. Price: £22,599, £2,959 more than this car. Dealer: Lookers BMW Stafford in Stafford. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-adfe708c5ca3
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey. Mileage: 31,460 miles. Price: £22,370, £2,730 more than this car. Dealer: Carsa Cannock in Cannock. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-8eb9e5386599
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey. Mileage: 31,312 miles. Price: £21,049, £1,409 more than this car. Dealer: Motorpoint Burnley in Burnley. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-2688e420b9cf

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue, 18 miles from this car. Mileage: 35,503 miles. Price: £20,998, £1,358 more than this car. Dealer: Arnold Clark East Kilbride Vauxhall in East Kilbride. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-18c6c5d23ec4