2021 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i M Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)
• Year: 2021
• Mileage: 21,725 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 151 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 4 Series M Sport has covered 21,725 miles, around 22,300 fewer miles than is typical for its age. Its asking price of £25,900 is £765 below the AskCar estimate of £26,665. The AskCar estimate uses UK dealer asking prices, including 1,833 BMW 4 Series adverts, and accounts for the car’s age, mileage and specification. We have tracked this advert for 67 days. The government's MOT record matches its advertised mileage. You can find this car at Berry Chiswick BMW in Brentford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £765 (2%) under the AskCar estimate of £26,665.

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 1,833 priced BMW 4 Series adverts across different ages and specifications, as of 5 November 2026.

A 2021 BMW 4 Series with the 2.0 petrol engine is typically advertised at £24,000: the median of the 149 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2021 BMW 4 Series has been on sale for at least 67 days.

Price history

AskCar first saw this advert on 30 August 2026 at £25,900. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 18 November 2026.

It has had 2 MOTs. The latest, on 13 November 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 18,381 miles, which matches the advertised 21,725 miles.

Advertised mileage is about 22,300 miles lower than the median mileage of a 2021 BMW 4 Series on AskCar.

Similar cars

48 other 2021 BMW 4 Series M Sport 2.0 petrol automatic coupes are for sale at UK dealers, from £17,490 to £27,975, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 22,884 miles. Price: £24,549, £1,351 less than this car. Dealer: Motorpoint Norwich in Norwich. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-a2829217e2a0
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 23,110 miles. Price: £24,995, £905 less than this car. Dealer: Agnew Group Bavarian BMW in Belfast. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-416e680d89ac
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 24,024 miles. Price: £26,750, £850 more than this car. Dealer: Stratstone Select Bracknell in Bracknell. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-3e746f50e110

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white, 5 miles from this car. Mileage: 56,431 miles. Price: £17,490, £8,410 less than this car. Dealer: Car Holics in Hillingdon. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-50114104eb76