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: 52,196 miles
• Fuel: Diesel
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 124 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 52,196 miles, this 2020 BMW 4 Series M Sport has covered about 9,700 more miles than other 2020 BMW 4 Series cars. The AskCar estimate for this car is £16,978. It is priced at £14,300, which is £2,678 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 1,787 BMW 4 Series cars across different ages and specifications. The dealer may accept less. This car has been on sale for at least 96 days, and its asking price is down £2,050. The government's MOT record matches its advertised mileage. It is advertised by Car Planet Watford in Rickmansworth. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Good value: £2,678 (15%) under the AskCar estimate of £16,978.

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 1,787 priced BMW 4 Series adverts across different ages and specifications, as of 2 November 2026.

A 2020 BMW 4 Series with the 2.0 diesel engine is typically advertised at £19,500: the median of the 37 for sale on AskCar, as of 2 November 2026.

Time on sale

The dealer may accept less. This 2020 BMW 4 Series has been on sale for at least 96 days, and its asking price has been cut by £2,050. About half of 2020 BMW 4 Series cars are gone from sale within a month of being advertised: 39 of the 74 first advertised between 10 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 29 July 2026 at £16,350. Its asking price is now £14,300, £2,050 less. The latest price cut was seen on 30 October 2026.

Price changes recorded:

• 29 July 2026: £16,350
• 18 August 2026: £16,150
• 25 August 2026: £16,250
• 1 September 2026: £16,150
• 8 September 2026: £16,050
• 15 September 2026: £15,850
• 22 September 2026: £15,650
• 28 September 2026: £15,500
• 5 October 2026: £15,200
• 11 October 2026: £15,050
• 17 October 2026: £14,800
• 23 October 2026: £14,500
• 30 October 2026: £14,300

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 28 February 2027.

It has had 4 MOTs. The latest, on 14 February 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 48,800 miles, which matches the advertised 52,196 miles.

Advertised mileage is about 9,700 miles higher 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 £14,299 to £21,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW 4 Series M Sport, 2.0 diesel coupe, blue. Mileage: 56,500 miles. Price: £21,995, £7,695 more than this car. Dealer: Grayswood Cars in Haslemere. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-7a160effa96a
• 2020 BMW 4 Series M Sport, 2.0 diesel coupe, black. Mileage: 47,070 miles. Price: £16,499, £2,199 more 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, blue. Mileage: 57,500 miles. Price: £17,490, £3,190 more than this car. Dealer: Spa Motors Mid Wales in Brecon. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-3dc3542f2247