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: 37,000 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Red
• CO2: 151 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 4 Series M Sport has covered 37,000 miles, around 7,100 fewer miles than is typical for its age. The dealer is asking £25,850, which is £1,180 above the AskCar estimate of £24,670. To work out the AskCar estimate, we analyse UK dealer adverts for 1,826 BMW 4 Series cars across different ages and specifications. Since we first spotted the advert 118 days ago, the asking price has dropped by £140. The government's MOT record matches its advertised mileage. It is advertised by A & S Cars in Bishop's Stortford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,180 (4%) over the AskCar estimate of £24,670.

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 1,826 priced BMW 4 Series adverts across different ages and specifications, as of 6 November 2026.

A 2021 BMW 4 Series with the 2.0 petrol engine is typically advertised at £23,800: the median of the 148 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2021 BMW 4 Series has been on sale for at least 118 days.

Price history

AskCar first saw this advert on 11 July 2026 at £25,990. Its asking price is now £25,850, £140 less. The latest price cut was seen on 15 July 2026.

Price changes recorded:

• 11 July 2026: £25,990
• 15 July 2026: £25,850

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 9 February 2027.

It has had 3 MOTs. The latest, on 16 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 31,791 miles, which matches the advertised 37,000 miles.

Advertised mileage is about 7,100 miles lower than the median mileage of a 2021 BMW 4 Series on AskCar.

Similar cars

47 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 6 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, black. Mileage: 36,929 miles. Price: £22,498, £3,352 less than this car. Dealer: Arnold Clark Wallsend Silverlink Citroen / Peugeot / Jeep / OMODA / JAECOO in Wallsend. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-50d97e73a146
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 36,484 miles. Price: £22,949, £2,901 less than this car. Dealer: Motorpoint Glasgow in Glasgow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-0818ea1bca21
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 36,301 miles. Price: £24,220, £1,630 less than this car. Dealer: Hippo Approved in Blackburn. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-18ed4f3a8ce0

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, grey, 8 miles from this car. Mileage: 50,000 miles. Price: £24,490, £1,360 less than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-696d9cef0d78