2021 BMW 4 Series

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

£23,438

Fair price: within 8% of the typical £24,841 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
36,119 miles
Year
2021
Fuel type
Petrol
Body type
Coupe
Engine
2.0 L
Gearbox
Automatic
Power
181 bhp
Seats
4
CO2
151 g/km
Colour
Grey
Doors
2
Driven wheels
Rear Wheel Drive
Engine badge
420i
Emissions standard
Euro 6

About this car

At 36,119 miles, this 2021 BMW 4 Series M Sport has covered about 5,900 fewer miles than other 2021 BMW 4 Series cars. Our estimated market asking price is £24,841. This car is advertised at £23,438, which is £1,403 below 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. Since we first spotted the advert 13 days ago, the asking price has dropped by £268. MOT records show an expiry date of 27 June 2027, and the latest recorded mileage is consistent with the advert. It is advertised by Carsa Durham in County Durham.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 11 October 2026, 13 days ago. Advert duration calculated on 24 October 2026. Net asking-price reduction: £268 from the first recorded £23,706. 2 price reductions recorded, the latest observed on 18 October 2026.

Recorded asking prices
Date observedAsking price
11 October 2026£23,706
14 October 2026£23,428
16 October 2026£23,459
18 October 2026£23,438
23 October 2026£23,438

Price and mileage comparison

Estimated market asking price: £24,841. The asking price is £1,403 below 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 5,900 miles lower than typical for a 2021 BMW 4 Series.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 27 June 2027. 34,179 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

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