2021 BMW 4 Series

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

£25,795

Fair price: within 8% of the typical £25,461 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
31,692 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

This 2021 BMW 4 Series M Sport is advertised with 31,692 miles, approximately 10,300 below the typical mileage for its age. Its asking price of £25,795 is £334 above our estimate of £25,461. 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 31 days ago. Its asking price has since fallen by £1,195. Our records show an MOT expiry date of 17 July 2026, which has passed. Ask the dealer for an update. Our comparison with the latest MOT reading has not flagged a mileage discrepancy. You can find this car at Partridge BMW in Eastleigh.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 24 September 2026, 31 days ago. Advert duration calculated on 25 October 2026. Net asking-price reduction: £1,195 from the first recorded £26,990. 4 price reductions recorded, the latest observed on 15 October 2026.

Recorded asking prices
Date observedAsking price
24 September 2026£26,990
3 October 2026£26,791
7 October 2026£26,492
10 October 2026£26,193
15 October 2026£25,795
23 October 2026£25,795

Price and mileage comparison

Estimated market asking price: £25,461. The asking price is £334 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 10,300 miles lower than typical for a 2021 BMW 4 Series.

The advertised mileage is consistent with the last MOT reading.

The recorded MOT has expired; ask the dealer for an up-to-date MOT.

MOT

MOT not valid until 17 July 2026. 31,616 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

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