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: 25,072 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 154 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: White
• CO2: 146 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series M Sport is advertised with 25,072 miles, approximately 30,100 below the typical mileage for its age. Its asking price of £19,727 is £1,981 below the AskCar estimate of £21,708. The AskCar estimate uses 6,886 UK dealer adverts for the BMW 3 Series, with adjustments for age, mileage, trim, engine and other specifications. It first appeared in our advert records today. We checked its advertised mileage against the government's MOT record, and they match. It is for sale at Carsa Towcester in West Northamptonshire. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Good value: £1,981 (9%) under the AskCar estimate of £21,708.

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 6,886 priced BMW 3 Series adverts across different ages and specifications, as of 7 November 2026.

Time on sale

AskCar first saw this 2021 BMW 3 Series advertised today. About half of 2021 BMW 3 Series cars are gone from sale within a month of being advertised: 436 of the 925 first advertised between 10 July 2026 and 4 October 2026.

Price history

AskCar first saw this advert on 7 November 2026 at £19,727. 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 7 November 2026: valid until 30 November 2027.

It has had 5 MOTs. The latest, on 5 November 2026, passed.

Advisories at the latest test: rear brake pad(s) wearing thin 3mm; nearside rear tyre worn close to legal limit/worn on edge 2mm; offside rear tyre worn close to legal limit/worn on edge 2mm.

Mileage at that test: 25,486 miles, which matches the advertised 25,072 miles.

Advertised mileage is about 30,100 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.

Similar cars

142 other 2021 BMW 3 Series M Sport 2.0 petrol automatic saloons are for sale at UK dealers, from £13,750 to £25,975, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey. Mileage: 24,255 miles. Price: £25,975, £6,248 more than this car. Dealer: Group 1 Borehamwood BMW in Borehamwood. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-4239e558525b
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue. Mileage: 26,054 miles. Price: £22,450, £2,723 more than this car. Dealer: AJC Car Sales in Newcastle upon Tyne. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-a5fedee7641f
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue. Mileage: 23,623 miles. Price: £23,495, £3,768 more than this car. Dealer: JCB Group Ashford Orbital Kia in Ashford. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-7d14ce336447

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey, 8 miles from this car. Mileage: 27,600 miles. Price: £22,750, £3,023 more than this car. Dealer: Wollaston BMW in Wollaston. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-99cf2662d1ee