2021 BMW 4 Series 2.0 420i M Sport
Version: 2.0 420i M Sport Auto RWD Euro 6 2dr Step (181 bhp)
Price: £23,249. Good value: £2,247 (8%) under the AskCar estimate of £25,496, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,747 priced BMW 4 Series adverts on AskCar as of 30 October 2026.
AskCar lists 1,781 used BMW 4 Series from 1,037 UK dealerships, as of 30 October 2026.
Overview
- Make
- BMW
- Model
- 4 Series
- Trim
- M Sport
- Version
- 2.0 420i M Sport Auto RWD Euro 6 2dr Step (181 bhp)
- Mileage
- 29,199 miles
- Year
- 2021
- Fuel type
- Petrol
- Body type
- Coupe
- Engine
- 2.0 L
- Gearbox
- Automatic
- Power
- 181 bhp
- Seats
- 4
- CO2
- 144 g/km
- Colour
- Blue
- Doors
- 2
- Driven wheels
- Rear Wheel Drive
- Engine badge
- 420i
- Emissions standard
- Euro 6
About this car
With 29,199 miles on the clock, this 2021 BMW 4 Series M Sport has done roughly 14,100 fewer miles than a typical 2021 BMW 4 Series. The dealer is asking £23,249, which is £2,247 below the AskCar estimate of £25,496. To work out the AskCar estimate, we analyse UK dealer adverts for 1,747 BMW 4 Series cars across different ages and specifications. We first saw this car advertised 155 days ago. Its asking price has since fallen by £2,100. That may be worth mentioning if you discuss the price with the dealer. MOT records show an expiry date of 3 March 2027, and the latest recorded mileage is consistent with the advert. The seller is Motorpoint Chingford, based in Chingford.
Stock data as of 30 October 2026.
Price history
AskCar first saw this advert on 28 May 2026, 155 days ago. Price reduced by £2,100 from £25,349 since AskCar first saw it. 5 price reductions recorded, the latest seen on 30 October 2026.
| Date observed | Asking price |
|---|---|
| 28 May 2026 | £25,349 |
| 4 June 2026 | £24,799 |
| 6 June 2026 | £25,049 |
| 16 June 2026 | £24,099 |
| 22 June 2026 | £23,649 |
| 25 June 2026 | £23,849 |
| 7 July 2026 | £23,699 |
| 30 October 2026 | £23,249 |
Price and mileage comparison
Good value: £2,247 (8%) under the AskCar estimate of £25,496.
The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.
It draws on 1,747 priced BMW 4 Series adverts across different ages and specifications, as of 30 October 2026.
Advertised mileage is about 14,100 miles lower than the median mileage of a 2021 BMW 4 Series on AskCar.
The advertised mileage is consistent with the last MOT reading.
MOT
MOT: valid until 3 March 2027. 27,639 miles at the last test.
Other matching cars
82 other 2021 BMW 4 Series M Sport automatic petrol cars are for sale at UK dealers from £16,995 to £33,950, as of 30 October 2026.
The 5 cheapest:
- 2021 BMW 4 Series. Price: £16,995. Mileage: 96,000 miles. Dealer: Motorhouse (Beds) in Bedford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-b61ce310b6dc
- 2021 BMW 4 Series. Price: £17,490. Mileage: 56,431 miles. Dealer: Car Holics in Hillingdon. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-50114104eb76
- 2021 BMW 4 Series. Price: £18,990. Mileage: 97,313 miles. Dealer: CS Autos Prestige Cars in Addlestone. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-affda13ef70c
- 2021 BMW 4 Series. Price: £19,900. Mileage: 77,199 miles. Dealer: Sytner Select Swindon in Swindon. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-83a0c15e0ab2
- 2021 BMW 4 Series. Price: £19,950. Mileage: 70,584 miles. Dealer: Staffordshire Car Company in Stoke-on-Trent. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-e032643e2607
Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. The AskCar estimate adjusts for these differences.
Browse all BMW 4 Series cars for sale · 2021 BMW 4 Series price guide
More like this
Photos
45 photos of this car are on its AskCar page.
How to contact the dealer and its opening hours are on this AskCar page.
As of 30 October 2026, AskCar lists 580,490 cars and vans from 12,695 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.