2021 BMW 4 Series

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

£26,999

Fair price: within 8% of the typical £27,729 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 PRO EDITION
Version
2.0 420i M Sport Pro Edition Auto RWD Euro 6 (s/s) 2dr (181 bhp)
Mileage
31,572 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
Grey
Doors
2
Driven wheels
Rear Wheel Drive
Engine badge
420i
Emissions standard
Euro 6

About this car

At 31,572 miles, this 2021 BMW 4 Series M Sport Pro Edition has covered about 10,400 fewer miles than other 2021 BMW 4 Series cars. Our estimated market asking price is £27,729. This car is advertised at £26,999, which is £730 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. The asking price is now £2,487 lower than when we first recorded the advert 50 days ago. Its MOT is recorded as valid until 27 June 2027. The advertised mileage is consistent with the latest MOT reading. It is for sale at Swansway Garages in Bolton.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 4 September 2026, 50 days ago. Advert duration calculated on 24 October 2026. Net asking-price reduction: £2,487 from the first recorded £29,486. 7 price reductions recorded, the latest observed on 20 October 2026.

Recorded asking prices
Date observedAsking price
4 September 2026£29,486
11 September 2026£29,291
18 September 2026£28,599
21 September 2026£28,499
25 September 2026£28,399
2 October 2026£27,999
9 October 2026£27,899
20 October 2026£26,999
23 October 2026£26,999

Price and mileage comparison

Estimated market asking price: £27,729. The asking price is £730 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 10,400 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. 30,712 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
£25,49544,428 miles
£25,99842,801 miles
£26,35051,000 miles

These cars have covered 14,047–51,676 miles, compared with 31,572 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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