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: 58,347 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

With 58,347 miles on the clock, this 2021 BMW 4 Series M Sport has done roughly 14,300 more miles than a typical 2021 BMW 4 Series. Its asking price of £21,995 is £45 above the AskCar estimate of £21,950. The AskCar estimate draws on 1,833 BMW 4 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 28 days ago. Its asking price has since fallen by £505. The government's MOT record matches its advertised mileage. You can find this car at Richard Greer Car Sales in Ballyclare. 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: £45 (under 1%) over the AskCar estimate of £21,950.

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 28 days.

Price history

AskCar first saw this advert on 8 October 2026 at £22,500. Its asking price is now £21,995, £505 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 8 October 2026: £22,500
• 4 November 2026: £21,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 9 January 2027.

It has had one MOT, on 10 January 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 46,139 miles, which matches the advertised 58,347 miles.

Advertised mileage is about 14,300 miles higher 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, black. Mileage: 57,443 miles. Price: £22,495, £500 more than this car. Dealer: The Car Centre in Manchester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-011f4cf69e16
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 56,431 miles. Price: £17,490, £4,505 less than this car. Dealer: Car Holics in Hillingdon. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-50114104eb76
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, red. Mileage: 60,566 miles. Price: £22,149, £154 more than this car. Dealer: Greendale Car Sales in Hawick. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-26cecc1cf030

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue, 13 miles from this car. Mileage: 23,110 miles. Price: £24,995, £3,000 more than this car. Dealer: Agnew Group Bavarian BMW in Belfast. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-416e680d89ac