2021 BMW 4 Series

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

£23,000

Fair price: within 8% of the typical £24,315 for this model, age and mileage, drawing on 1,758 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
40,178 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
Blue
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 40,178 miles. Our estimated market asking price is £24,315. This car is advertised at £23,000, which is £1,315 below that figure. To estimate its market asking price, we analyse UK dealer adverts for 1,758 BMW 4 Series cars across different ages and specifications. Since we first spotted the advert 17 days ago, the asking price has dropped by £300. The latest MOT record shows an expiry date of 13 March 2027, with the advertised mileage consistent with the recorded reading. You can find this car at Car Planet Barnet in New Southgate.

Stock data from 22 October 2026.

How we estimate prices and check cars

Price history

First seen on 6 October 2026, 17 days ago. Advert duration calculated on 23 October 2026. Net asking-price reduction: £300 from the first recorded £23,300. 1 price reduction recorded, the latest observed on 17 October 2026.

Recorded asking prices
Date observedAsking price
6 October 2026£23,300
17 October 2026£23,000
22 October 2026£23,000

Price and mileage comparison

Estimated market asking price: £24,315. The asking price is £1,315 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 1,758 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 500 miles lower than typical for a 2021 BMW 4 Series.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 13 March 2027. 38,125 miles at the last test.

87 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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