2021 BMW 3 Series 2.0 320d MHT M Sport

Overview

• Make: BMW
• Model: 3 Series
• Trim: M Sport
• Version: 2.0 320d MHT M Sport Auto RWD Euro 6 (s/s) 4dr (187 bhp)
• Year: 2021
• Mileage: 75,759 miles
• Fuel: Diesel, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 129 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 75,759 miles on the clock, this 2021 BMW 3 Series M Sport has done roughly 20,900 more miles than a typical 2021 BMW 3 Series. Its asking price of £18,300 is £59 below the AskCar estimate of £18,359. The AskCar estimate uses 6,897 UK dealer adverts for the BMW 3 Series, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 72 days ago, the asking price has dropped by £1,700. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Select Swindon, based in Swindon. 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: £59 (under 1%) under the AskCar estimate of £18,359.

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

This 2021 BMW 3 Series has been on sale for at least 72 days.

Price history

AskCar first saw this advert on 25 August 2026 at £20,000. Its asking price is now £18,300, £1,700 less. The latest price cut was seen on 23 October 2026.

Price changes recorded:

• 25 August 2026: £20,000
• 12 September 2026: £18,900
• 15 October 2026: £18,700
• 23 October 2026: £18,300

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 30 March 2027.

It has had 3 MOTs. The latest, on 20 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 70,484 miles, which matches the advertised 75,759 miles.

Advertised mileage is about 20,900 miles higher than the median mileage of a 2021 BMW 3 Series on AskCar.

Similar cars

59 other 2021 BMW 3 Series M Sport 2.0 diesel automatic saloons are for sale at UK dealers, from £12,700 to £25,995, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 2.0 diesel saloon, grey. Mileage: 75,000 miles. Price: £18,980, £680 more than this car. Dealer: Kent Vehicles in Herne Common. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-db1edad3a28a
• 2021 BMW 3 Series M Sport, 2.0 diesel saloon, black. Mileage: 77,000 miles. Price: £16,895, £1,405 less than this car. Dealer: Autosmith N.e in Sunderland. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-d43f1697be8c
• 2021 BMW 3 Series M Sport, 2.0 diesel saloon, blue. Mileage: 73,370 miles. Price: £17,186, £1,114 less than this car. Dealer: Carbase Lympsham in Lympsham. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-841b8ab8a8b1

• The nearest: 2021 BMW 3 Series M Sport, 2.0 diesel saloon, black, 35 miles from this car. Mileage: 68,204 miles. Price: £18,521, £221 more than this car. Dealer: Carbase Bristol in Bristol. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-f3d7233ce236