2020 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: 2020
• Mileage: 42,701 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

This 2020 BMW 3 Series M Sport is advertised with 42,701 miles, approximately 17,300 below the typical mileage for its age. The AskCar estimate for this car is £22,247. It is priced at £20,750, which is £1,497 below that estimate. The AskCar estimate draws on 6,902 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. Since we first spotted the advert 47 days ago, the asking price has dropped by £1,500. We checked its advertised mileage against the government's MOT record, and they match. It is for sale at Car Planet Watford in Rickmansworth. 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: £1,497 (6%) under the AskCar estimate of £22,247.

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.

A 2020 BMW 3 Series with the 2.0 diesel engine is typically advertised at £18,500: the median of the 462 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2020 BMW 3 Series has been on sale for at least 47 days.

Price history

AskCar first saw this advert on 20 September 2026 at £22,250. Its asking price is now £20,750, £1,500 less. The latest price cut was seen on 6 November 2026.

Price changes recorded:

• 20 September 2026: £22,250
• 14 October 2026: £21,950
• 16 October 2026: £21,650
• 24 October 2026: £21,350
• 31 October 2026: £21,050
• 6 November 2026: £20,750

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 25 January 2027.

It has had 7 MOTs. The latest, on 26 January 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.

Mileage at that test: 38,378 miles, which matches the advertised 42,701 miles.

Advertised mileage is about 17,300 miles lower than the median mileage of a 2020 BMW 3 Series on AskCar.

Similar cars

68 other 2020 BMW 3 Series M Sport 2.0 diesel automatic saloons are for sale at UK dealers, from £10,290 to £23,977, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW 3 Series M Sport, 2.0 diesel saloon, black. Mileage: 42,277 miles. Price: £21,995, £1,245 more than this car. Dealer: John Clark BMW Tayside in Dundee. AskCar page: https://askcar.co.uk/car/bmw-3-series-2020-36e0664f391c
• 2020 BMW 3 Series M Sport, 2.0 diesel saloon, white. Mileage: 43,756 miles. Price: £19,999, £751 less than this car. Dealer: HPL Stockport in Stockport. AskCar page: https://askcar.co.uk/car/bmw-3-series-2020-636af1386786
• 2020 BMW 3 Series M Sport, 2.0 diesel saloon, blue. Mileage: 41,455 miles. Price: £22,600, £1,850 more than this car. Dealer: MINI UK at John Clark Aberdeen in Aberdeen. AskCar page: https://askcar.co.uk/car/bmw-3-series-2020-5635b313d585

• The nearest: 2020 BMW 3 Series M Sport, 2.0 diesel saloon, white, under a mile from this car. Mileage: 62,294 miles. Price: £16,750, £4,000 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/bmw-3-series-2020-47f4dd3f3f89