2021 BMW 4 Series 2.0 420i M Sport
Price: £24,950. Fair price: £981 (4%) over the AskCar estimate of £23,969, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,833 priced BMW 4 Series adverts on AskCar as of 5 November 2026.
AskCar lists 1,879 used BMW 4 Series from 1,081 UK dealerships, as of 5 November 2026.
Overview
- Make: BMW
- Model: 4 Series
- Trim: M Sport
- Version: 2.0 420i M Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)
- Year: 2021
- Mileage: 42,000 miles
- Fuel: Petrol
- Body: Convertible, 2 doors, 4 seats
- Engine: 2.0 litres, 181 bhp
- Gearbox: Automatic
- Drive: Rear-wheel drive
- Colour: Black
- CO2: 160 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
With 42,000 miles on the clock, this 2021 BMW 4 Series M Sport has done roughly 2,100 fewer miles than a typical 2021 BMW 4 Series. The AskCar estimate for this car is £23,969. It is priced at £24,950, which is £981 above that estimate. The AskCar estimate uses 1,833 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 34 days ago. It is for sale at Sovereign Trading in Pevensey. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 5 November 2026.
Price
Fair price: £981 (4%) over the AskCar estimate of £23,969.
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 2021 BMW 4 Series with the 2.0 petrol engine is typically advertised at £24,000: the median of the 149 for sale on AskCar, as of 5 November 2026.
Time on sale
This 2021 BMW 4 Series has been on sale for at least 34 days.
Price history
AskCar first saw this advert on 2 October 2026 at £24,950. Its asking price has not changed.
Mileage and MOT
Advertised mileage is about 2,100 miles lower than the median mileage of a 2021 BMW 4 Series on AskCar.
Similar cars
26 other 2021 BMW 4 Series M Sport 2.0 petrol automatic convertibles are for sale at UK dealers, from £18,990 to £33,950, as of 5 November 2026.
The 3 closest to this car in mileage:
- 2021 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 41,900 miles. Price: £26,995, £2,045 more than this car. Dealer: Car Monkey in Rawtenstall. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-e74a6040c3cb
- 2021 BMW 4 Series M Sport, 2.0 petrol convertible, green. Mileage: 41,580 miles. Price: £25,895, £945 more than this car. Dealer: Century Cars in Turners Hill. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-8fafe0e55cc8
- 2021 BMW 4 Series M Sport, 2.0 petrol convertible, black. Mileage: 43,305 miles. Price: £24,000, £950 less than this car. Dealer: MB Brent Park in London. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-fb7d7a051e27
- The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol convertible, blue, 25 miles from this car. Mileage: 24,899 miles. Price: £26,895, £1,945 more than this car. Dealer: Century Cars in Turners Hill. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-7b8b9a6a1c14
Browse all BMW 4 Series cars for sale · 2021 BMW 4 Series price guide
More like this
- Used BMW 4 Series M Sport prices
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Photos
29 photos of this car are on its AskCar page.
As of 5 November 2026, AskCar lists 595,776 cars and vans from 12,945 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.