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: 23,603 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 151 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 4 Series M Sport is advertised with 23,603 miles, approximately 20,500 below the typical mileage for its age. The dealer is asking £27,000, which is £473 above the AskCar estimate of £26,527. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. We have tracked this advert for 34 days. Its advertised mileage matches the government's MOT record. It is for sale at Prestige Cars Of Essex in Epping Forest. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £473 (1%) over the AskCar estimate of £26,527.

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 1,814 priced BMW 4 Series adverts across different ages and specifications, as of 4 November 2026.

A 2021 BMW 4 Series with the 2.0 petrol engine is typically advertised at £24,000: the median of the 144 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 BMW 4 Series has been on sale for at least 34 days.

Price history

AskCar first saw this advert on 1 October 2026 at £27,000. 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 4 November 2026: valid until 12 November 2026.

It failed its MOT on 13 November 2025 (nearside rear tyre tread depth below requirements of 1.6mm; offside rear tyre tread depth below requirements of 1.6mm) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 18,250 miles, which matches the advertised 23,603 miles.

Advertised mileage is about 20,500 miles lower than the median mileage of a 2021 BMW 4 Series on AskCar.

Similar cars

45 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 4 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 24,024 miles. Price: £26,750, £250 less than this car. Dealer: Stratstone Select Bracknell in Bracknell. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-3e746f50e110
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 23,110 miles. Price: £24,995, £2,005 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, white. Mileage: 22,884 miles. Price: £24,549, £2,451 less than this car. Dealer: Motorpoint Norwich in Norwich. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-a2829217e2a0

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, grey, under a mile from this car. Mileage: 50,000 miles. Price: £24,490, £2,510 less than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-696d9cef0d78