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 2dr Step (181 bhp)
• Year: 2021
• Mileage: 23,110 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 144 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 4 Series M Sport is advertised with 23,110 miles, approximately 20,900 below the typical mileage for its age. Its asking price of £24,995 is £1,304 below the AskCar estimate of £26,299. The AskCar estimate uses 1,833 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 43 days ago. Its asking price has since fallen by £1,000. The government's MOT record matches its advertised mileage. You can find this car at Agnew Group Bavarian BMW in Belfast. 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: £1,304 (4%) under the AskCar estimate of £26,299.

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 43 days.

Price history

AskCar first saw this advert on 23 September 2026 at £25,995. Its asking price is now £24,995, £1,000 less. The latest price cut was seen on 30 September 2026.

Price changes recorded:

• 23 September 2026: £25,995
• 30 September 2026: £24,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 11 May 2027.

It has had one MOT, on 12 May 2025, and passed.

There were no advisories at the latest test.

Mileage at that test: 18,543 miles, which matches the advertised 23,110 miles.

Advertised mileage is about 20,900 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, £446 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: 24,024 miles. Price: £26,750, £1,755 more 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: 21,725 miles. Price: £25,900, £905 more than this car. Dealer: Berry Chiswick BMW in Ealing. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-69856dfdc389

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue, 13 miles from this car. Mileage: 58,347 miles. Price: £21,995, £3,000 less than this car. Dealer: Richard Greer Car Sales in Ballyclare. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-581b1cbc102c