2020 BMW 4 Series 2.0 420d M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420d M Sport Auto RWD Euro 6 (s/s) 2dr (187 bhp)
• Year: 2020
• Mileage: 38,500 miles
• Fuel: Diesel
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 124 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 BMW 4 Series M Sport has covered 38,500 miles, around 4,600 fewer miles than is typical for its age. Priced at £17,990, it is advertised £223 below the AskCar estimate of £18,213. To work out the AskCar estimate, we analyse UK dealer adverts for 1,833 BMW 4 Series cars across different ages and specifications. The dealer may accept less: this car has been on sale for at least 79 days, and its asking price has been cut by £1,000. We checked its advertised mileage against the government's MOT record, and they match. The seller is S James Prestige, based in Stamford. 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: £223 (1%) under the AskCar estimate of £18,213.

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 1,833 priced BMW 4 Series adverts across different ages and specifications, as of 5 November 2026.

A 2020 BMW 4 Series with the 2.0 diesel engine is typically advertised at £19,400: the median of the 38 for sale on AskCar, as of 5 November 2026.

Time on sale

The dealer may accept less. This 2020 BMW 4 Series has been on sale for at least 79 days, and its asking price has been cut by £1,000. About 6 in 10 of 2020 BMW 4 Series cars are gone from sale within a month of being advertised: 43 of the 78 first advertised between 10 July 2026 and 2 October 2026.

Price history

AskCar first saw this advert on 18 August 2026 at £18,990. Its asking price is now £17,990, £1,000 less. The latest price cut was seen on 22 October 2026.

Price changes recorded:

• 18 August 2026: £18,990
• 22 September 2026: £18,490
• 22 October 2026: £17,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 6 August 2027.

It failed its MOT on 17 July 2026 (offside rear brake pad(s) less than 1.5 mm thick) and passed 14 days later, on 31 July 2026.

There were no advisories at the latest test.

Mileage at that test: 37,908 miles, which matches the advertised 38,500 miles.

Advertised mileage is about 4,600 miles lower than the median mileage of a 2020 BMW 4 Series on AskCar.

Similar cars

8 other 2020 BMW 4 Series M Sport 2.0 diesel automatic coupes are for sale at UK dealers, from £13,899 to £21,995, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW 4 Series M Sport, 2.0 diesel coupe, black. Mileage: 47,070 miles. Price: £16,499, £1,491 less than this car. Dealer: cinch Bellevue in Hook. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-8d62982a9969
• 2020 BMW 4 Series M Sport, 2.0 diesel coupe, grey. Mileage: 52,196 miles. Price: £14,100, £3,890 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-e6cde8d9d59e
• 2020 BMW 4 Series M Sport, 2.0 diesel coupe, black. Mileage: 24,786 miles. Price: £19,395, £1,405 more than this car. Dealer: Motor Trust Lancaster in Lancaster. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-8f4f403046e5