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: 45,300 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 has covered 45,300 miles, around 9,900 fewer miles than is typical for its age. Priced at £18,600, it is advertised £1,032 below the AskCar estimate of £19,632. The AskCar estimate uses 6,862 UK dealer adverts for the BMW 3 Series, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 98 days ago, the asking price has dropped by £2,600. The government's MOT record matches its advertised mileage. You can find this car at GS Car Centre in Preston. 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: £1,032 (5%) under the AskCar estimate of £19,632.

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 98 days.

Price history

AskCar first saw this advert on 29 July 2026 at £21,200. Its asking price is now £18,600, £2,600 less. The latest price cut was seen on 31 October 2026.

Price changes recorded:

• 29 July 2026: £21,200
• 20 August 2026: £20,900
• 8 September 2026: £19,900
• 20 September 2026: £19,800
• 23 September 2026: £18,800
• 31 October 2026: £18,600

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 10 November 2026.

It has had 3 MOTs. The latest, on 7 November 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 40,156 miles, which matches the advertised 45,300 miles.

Advertised mileage is about 9,900 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, black. Mileage: 45,279 miles. Price: £22,033, £3,433 more than this car. Dealer: Carbase Lympsham in Lympsham. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-903490b896b4
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, white. Mileage: 45,121 miles. Price: £15,495, £3,105 less than this car. Dealer: KZ Autos in Coventry. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-86b5c668ee2d
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, black. Mileage: 46,000 miles. Price: £20,995, £2,395 more than this car. Dealer: Enkae Prestige Motors in Huddersfield. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-6855ce456eaa

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol saloon, black, 3 miles from this car. Mileage: 91,000 miles. Price: £15,500, £3,100 less than this car. Dealer: Invicta Omoda Jaecoo Preston in Preston. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-e3b0a3be7c88