2020 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i GPF M Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)
• Year: 2020
• Mileage: 19,927 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 139 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2020 BMW 4 Series M Sport is 19,927 miles. Its asking price of £16,350 is £2,712 below the AskCar estimate of £19,062. The AskCar estimate draws on 1,825 BMW 4 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. Since we first spotted the advert 153 days ago, the asking price has dropped by £3,250. Ask the dealer why the advert shows fewer miles than the 20,578 recorded at the latest MOT. MOT records show an expiry date of 9 June 2027. It is for sale at Car Planet Barnet in New Southgate. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Good value: £2,712 (14%) under the AskCar estimate of £19,062.

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 1,825 priced BMW 4 Series adverts across different ages and specifications, as of 7 November 2026.

A 2020 BMW 4 Series with the 2.0 petrol engine is typically advertised at £19,500: the median of the 40 for sale on AskCar, as of 7 November 2026.

Time on sale

This 2020 BMW 4 Series has been on sale for at least 153 days.

Price history

AskCar first saw this advert on 7 June 2026 at £19,600. Its asking price is now £16,350, £3,250 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 7 June 2026: £19,600
• 22 June 2026: £19,550
• 29 June 2026: £19,600
• 6 July 2026: £19,350
• 13 July 2026: £19,100
• 20 July 2026: £18,900
• 27 July 2026: £18,800
• 3 August 2026: £18,650
• 10 August 2026: £18,550
• 19 August 2026: £18,500
• 2 September 2026: £18,550
• 8 September 2026: £18,450
• 15 September 2026: £18,300
• 22 September 2026: £18,000
• 28 September 2026: £17,700
• 4 October 2026: £17,400
• 9 October 2026: £17,100
• 16 October 2026: £16,800
• 21 October 2026: £16,500
• 28 October 2026: £16,350

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 9 June 2027.

It has had 4 MOTs. The latest, on 10 June 2026, passed.

Advisories at the latest test: front windscreen wiper blade defective both.

Mileage at that test: 20,578 miles. The advert says 19,927 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 23,800 miles lower than the median mileage of a 2020 BMW 4 Series on AskCar.

Similar cars

15 other 2020 BMW 4 Series M Sport 2.0 petrol automatic coupes are for sale at UK dealers, from £15,450 to £53,950, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 20,668 miles. Price: £19,495, £3,145 more than this car. Dealer: Park's Motor Group Park's Arbroath in Arbroath. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-ff66b41870bc
• 2020 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 22,903 miles. Price: £26,600, £10,250 more than this car. Dealer: Evans Halshaw Citroen Rotherham in Rotherham. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-dd0c661900bd
• 2020 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 14,941 miles. Price: £22,510, £6,160 more than this car. Dealer: Big Motoring World Leeds in Leeds. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-71c62883e20a

• The nearest: 2020 BMW 4 Series M Sport, 2.0 petrol coupe, black, 15 miles from this car. Mileage: 36,608 miles. Price: £17,995, £1,645 more than this car. Dealer: SKV Motors in Romford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-4fd7204f8aed