2021 BMW 4 Series

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

£29,050

Fair price: within 8% of the typical £28,892 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 PRO EDITION
Version
2.0 420i M Sport Pro Edition Auto RWD Euro 6 (s/s) 2dr (181 bhp)
Mileage
23,667 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
Blue
Doors
2
Driven wheels
Rear Wheel Drive
Engine badge
420i
Emissions standard
Euro 6

About this car

At 23,667 miles, this 2021 BMW 4 Series M Sport Pro Edition has covered about 17,000 fewer miles than other 2021 BMW 4 Series cars. Our estimated market asking price is £28,892. This car is advertised at £29,050, which is £158 above 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 16 days ago, the asking price has dropped by £300. Its recorded MOT is valid until 11 June 2027, and its advertised mileage is consistent with the latest MOT reading. You can find this car at Car Planet Watford in Rickmansworth.

Stock data from 22 October 2026.

How we estimate prices and check cars

Price history

First seen on 8 October 2026, 16 days ago. Advert duration calculated on 24 October 2026. Net asking-price reduction: £300 from the first recorded £29,350. 1 price reduction recorded, the latest observed on 21 October 2026.

Recorded asking prices
Date observedAsking price
8 October 2026£29,350
21 October 2026£29,050
22 October 2026£29,050

Price and mileage comparison

Estimated market asking price: £28,892. The asking price is £158 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 1,758 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 17,000 miles lower than typical for a 2021 BMW 4 Series.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 11 June 2027. 22,188 miles at the last test.

10 other cars with the same year, trim, gearbox and fuel are for sale from £23,950 to £30,390.

Other matching cars (up to five, cheapest first)
Asking priceMileage
£23,95051,676 miles
£24,99047,700 miles
£25,99544,428 miles
£25,99842,801 miles
£26,35051,000 miles

These cars have covered 14,047–51,676 miles, compared with 23,667 miles for this car.

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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