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: 52,840 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 52,840 miles, around 2,300 fewer miles than is typical for its age. Its asking price of £17,991 is £690 below the AskCar estimate of £18,681. The AskCar estimate uses UK dealer asking prices, including 6,902 BMW 3 Series adverts, and accounts for the car’s age, mileage and specification. This car was first seen in our listings data 20 days ago. The recorded MOT expired on 1 May 2026, so ask the dealer whether it has been renewed. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Cardiff Trade Sales, based in Cardiff. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £690 (3%) under the AskCar estimate of £18,681.

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 6,902 priced BMW 3 Series adverts across different ages and specifications, as of 6 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 20 days.

Price history

AskCar first saw this advert on 17 October 2026 at £17,991. 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 6 November 2026: the latest record we hold ran out on 1 May 2026; ask the dealer for the current MOT.

It failed its MOT on 9 April 2025 (offside rear tyre tread depth below requirements of 1.6mm 255 40 18) and passed later the same day.

Advisories at the latest test: nearside front tyre slightly damaged 225 45 18.

Mileage at that test: 45,850 miles, which matches the advertised 52,840 miles.

Advertised mileage is about 2,300 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.

Similar cars

143 other 2021 BMW 3 Series M Sport 2.0 petrol automatic saloons are for sale at UK dealers, from £14,000 to £25,975, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, black. Mileage: 53,203 miles. Price: £17,999, the same price as this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-79d89a401a93
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, white. Mileage: 52,239 miles. Price: £19,099, £1,108 more than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-55b02185bbaa
• 2021 BMW 3 Series M Sport, 2.0 petrol saloon, blue. Mileage: 53,444 miles. Price: £19,395, £1,404 more than this car. Dealer: Motor Trust UK Garstang in Preston. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-c8daac2312c2

• The nearest: 2021 BMW 3 Series M Sport, 2.0 petrol saloon, grey, under a mile from this car. Mileage: 87,565 miles. Price: £14,995, £2,996 less than this car. Dealer: Cardiff Trade Sales in Cardiff. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-702837a69868