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) 5dr Touring (154 bhp)
• Year: 2021
• Mileage: 46,311 miles
• Fuel: Petrol
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 154 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 153 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 46,311 miles on the clock, this 2021 BMW 3 Series M Sport has done roughly 8,500 fewer miles than a typical 2021 BMW 3 Series. Its asking price of £20,999 is £573 above the AskCar estimate of £20,426. The AskCar estimate draws on 6,897 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. It first appeared in our advert records 5 days ago. Its advertised mileage matches the government's MOT record. The seller is Halliwell Jones Wilmslow BMW, based in Wilmslow. 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: £573 (2%) over the AskCar estimate of £20,426.

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

AskCar first saw this 2021 BMW 3 Series advertised 5 days ago. About half of 2021 BMW 3 Series cars are gone from sale within a month of being advertised: 429 of the 907 first advertised between 10 July 2026 and 2 October 2026.

Price history

AskCar first saw this advert on 31 October 2026 at £20,999. 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 14 July 2027.

It has had 3 MOTs. The latest, on 15 July 2026, passed.

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

Mileage at that test: 43,803 miles, which matches the advertised 46,311 miles.

Advertised mileage is about 8,500 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.

Similar cars

30 other 2021 BMW 3 Series M Sport 2.0 petrol automatic estates are for sale at UK dealers, from £14,495 to £29,990, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 2.0 petrol estate, blue. Mileage: 46,170 miles. Price: £23,995, £2,996 more than this car. Dealer: V12 Sports & Classics Ltd -Worksop in Worksop. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-d99ec2808e84
• 2021 BMW 3 Series M Sport, 2.0 petrol estate, black. Mileage: 47,100 miles. Price: £22,990, £1,991 more than this car. Dealer: S James Prestige in Essendine. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-013473fc06e4
• 2021 BMW 3 Series M Sport, 2.0 petrol estate, grey. Mileage: 45,398 miles. Price: £21,990, £991 more than this car. Dealer: Direct Cars in Sheffield. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-1e1d2de33bed

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol estate, grey, 20 miles from this car. Mileage: 37,753 miles. Price: £21,490, £491 more than this car. Dealer: Swansway Garages Crewe Volkswagen in Crewe. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-9e91b8d2f332