2021 BMW 4 Series

2.0 420i M Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)

£24,000

Fair price: within 8% of the typical £23,954 for this model, age and mileage, drawing on 1,749 adverts of this make and model.

Overview

Make
BMW
Model
4 Series
Trim
M SPORT
Version
2.0 420i M Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)
Mileage
43,305 miles
Year
2021
Fuel type
Petrol
Body type
Convertible
Engine
2.0 L
Gearbox
Automatic
Power
181 bhp
Seats
4
CO2
160 g/km
Colour
Black
Doors
2
Driven wheels
Rear Wheel Drive
Engine badge
420i
Emissions standard
Euro 6

About this car

The advertised mileage for this 2021 BMW 4 Series M Sport is 43,305 miles. Its asking price of £24,000 is £46 above our estimate of £23,954. We use UK dealer asking prices, including 1,749 BMW 4 Series listings, and account for the car’s age, mileage and specification. The asking price is now £1,500 lower than when we first recorded the advert 112 days ago. That may be worth mentioning if you discuss the price with the dealer. The latest MOT record shows an expiry date of 30 May 2027, with the advertised mileage consistent with the recorded reading. You can find this car at MB Brent Park in London.

Stock data from 21 October 2026.

How we estimate prices and check cars

Price history

First seen on 2 July 2026, 112 days ago. Advert duration calculated on 22 October 2026. Net asking-price reduction: £1,500 from the first recorded £25,500. 2 price reductions recorded, the latest observed on 13 October 2026.

Recorded asking prices
Date observedAsking price
2 July 2026£25,500
7 July 2026£25,500
9 September 2026£25,000
13 October 2026£24,000
21 October 2026£24,000

Price and mileage comparison

Estimated market asking price: £23,954. The asking price is £46 above this estimate.

The estimate uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It estimates an advertised price, not a confirmed sale price.

The pricing calculation includes 1,749 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 1,300 miles higher than typical for a 2021 BMW 4 Series.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 30 May 2027. 43,231 miles at the last test.

86 other cars with the same year, trim, gearbox and fuel are for sale from £16,995 to £41,000.

Other matching cars (up to five, cheapest first)
Asking priceMileage
£16,99596,000 miles
£17,49056,431 miles
£18,99097,313 miles
£19,90077,199 miles
£20,75086,002 miles

Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. Our estimate adjusts for these differences using the wider market data.

Browse all BMW 4 Series cars for sale · 2021 BMW 4 Series price guide

How to contact the dealer, its opening hours and the cheaper cars like this one are on this AskCar page.

Vehicle photos