2021 BMW 4 Series

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

£20,999

Fair price: within 8% of the typical £19,915 for this model, age and mileage, drawing on 1,725 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
72,748 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

At 72,748 miles, this 2021 BMW 4 Series M Sport has covered about 30,700 more miles than other 2021 BMW 4 Series cars. Our estimated market asking price is £19,915. This car is advertised at £20,999, which is £1,084 above that figure. The estimate uses 1,725 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 36 days ago. Its asking price has since fallen by £501. 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 Pro-Division Car Sales in Larbert.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 19 September 2026, 36 days ago. Advert duration calculated on 25 October 2026. Net asking-price reduction: £501 from the first recorded £21,500. 1 price reduction recorded, the latest observed on 15 October 2026.

Recorded asking prices
Date observedAsking price
19 September 2026£21,500
15 October 2026£20,999
23 October 2026£20,999

Price and mileage comparison

Estimated market asking price: £19,915. The asking price is £1,084 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 1,725 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 30,700 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. 69,953 miles at the last test.

84 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
£20,95070,584 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

AskCar lists 589,789 cars from 13,079 UK dealer locations, read and updated daily from dealer websites. More than any other UK site. No dealer pays to be listed.