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: 25,569 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

At 25,569 miles, this 2021 BMW 4 Series M Sport has covered about 18,500 fewer miles than other 2021 BMW 4 Series cars. Its asking price of £26,990 is £695 above the AskCar estimate of £26,295. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. This car was first seen in our listings data 38 days ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Williams Bolton Bmw, based in Bolton. 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: £695 (2%) over the AskCar estimate of £26,295.

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 38 days.

Price history

AskCar first saw this advert on 27 September 2026 at £26,990. 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 2 March 2027.

It has had 4 MOTs. The latest, on 27 February 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 22,562 miles, which matches the advertised 25,569 miles.

Advertised mileage is about 18,500 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, £240 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: 27,204 miles. Price: £24,995, £1,995 less than this car. Dealer: Norman Motors (Poole) in Poole. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-62d150e19e37
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, black. Mileage: 23,603 miles. Price: £27,000, the same price as this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-fee384f694d2

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue, 8 miles from this car. Mileage: 28,502 miles. Price: £24,799, £2,191 less than this car. Dealer: Fords of Winsford Manchester in Manchester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-029b5d1c5ee2