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: 36,119 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 151 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 36,119 miles, this 2021 BMW 4 Series M Sport has covered about 7,900 fewer miles than other 2021 BMW 4 Series cars. The AskCar estimate for this car is £24,792. It is priced at £23,115, which is £1,677 below that estimate. The AskCar estimate uses 1,826 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 26 days ago, the asking price has dropped by £591. The government's MOT record matches its advertised mileage. It is advertised by Carsa Durham in County Durham. 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: £1,677 (6%) under the AskCar estimate of £24,792.

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 26 days.

Price history

AskCar first saw this advert on 11 October 2026 at £23,706. Its asking price is now £23,115, £591 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 11 October 2026: £23,706
• 14 October 2026: £23,428
• 16 October 2026: £23,459
• 18 October 2026: £23,438
• 3 November 2026: £23,115

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 27 June 2027.

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

There were no advisories at the latest test.

Mileage at that test: 34,179 miles, which matches the advertised 36,119 miles.

Advertised mileage is about 7,900 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, white. Mileage: 36,301 miles. Price: £24,220, £1,105 more than this car. Dealer: Hippo Approved in Blackburn. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-18ed4f3a8ce0
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 36,484 miles. Price: £22,949, £166 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, black. Mileage: 36,929 miles. Price: £22,498, £617 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

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white, 8 miles from this car. Mileage: 49,551 miles. Price: £20,990, £2,125 less than this car. Dealer: Avanti Motors in Darlington. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-0bab330089b7