2021 BMW 4 Series

2.0 420i M Sport [Pro Pack] Auto RWD Euro 6 2dr Step (181 bhp)

£25,500

Fair price: within 8% of the typical £25,773 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 [Pro Pack] Auto RWD Euro 6 2dr Step (181 bhp)
Mileage
31,414 miles
Year
2021
Fuel type
Petrol
Engine
2.0 L
Gearbox
Automatic
Power
181 bhp
Seats
4
CO2
151 g/km
Colour
Black
Doors
2
Driven wheels
Rear Wheel Drive
Engine badge
420i
Emissions standard
Euro 6

About this car

With 31,414 miles on the clock, this 2021 BMW 4 Series M Sport has done roughly 10,600 fewer miles than a typical 2021 BMW 4 Series. Our estimated market asking price is £25,773. This car is advertised at £25,500, which is £273 below that figure. To estimate its market asking price, we analyse UK dealer adverts for 1,725 BMW 4 Series cars across different ages and specifications. We first saw this car advertised 36 days ago. Its asking price has since fallen by £500. MOT records show an expiry date of 5 September 2027, and the latest recorded mileage is consistent with the advert. The seller is Sytner Cardiff BMW, based in Cardiff.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 18 September 2026, 36 days ago. Advert duration calculated on 24 October 2026. Net asking-price reduction: £500 from the first recorded £26,000. 1 price reduction recorded, the latest observed on 22 October 2026.

Recorded asking prices
Date observedAsking price
18 September 2026£26,000
22 October 2026£25,500
23 October 2026£25,500

Price and mileage comparison

Estimated market asking price: £25,773. The asking price is £273 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 10,600 miles lower than typical for a 2021 BMW 4 Series.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 5 September 2027. 31,360 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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