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: 50,000 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: White
• CO2: 151 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 50,000 miles, this 2021 BMW 4 Series M Sport has covered about 5,900 more miles than other 2021 BMW 4 Series cars. The AskCar estimate for this car is £22,947. It is priced at £21,260, which is £1,687 below that estimate. The AskCar estimate draws on 1,826 BMW 4 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 121 days ago. Its asking price has since fallen by £460. The government's MOT record matches its advertised mileage. It is advertised by Hippo Approved in Blackburn. 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: £1,687 (7%) under the AskCar estimate of £22,947.

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 121 days.

Price history

AskCar first saw this advert on 8 July 2026 at £21,720. Its asking price is now £21,260, £460 less. The latest price cut was seen on 9 October 2026.

Price changes recorded:

• 8 July 2026: £21,720
• 20 July 2026: £22,955
• 22 July 2026: £22,240
• 31 July 2026: £22,000
• 6 August 2026: £23,035
• 10 August 2026: £22,240
• 18 August 2026: £21,920
• 19 August 2026: £21,980
• 22 August 2026: £21,960
• 1 September 2026: £22,160
• 2 September 2026: £22,200
• 5 September 2026: £22,180
• 9 September 2026: £22,100
• 12 September 2026: £22,120
• 15 September 2026: £22,140
• 16 September 2026: £22,160
• 17 September 2026: £22,080
• 19 September 2026: £22,040
• 22 September 2026: £22,000
• 23 September 2026: £21,820
• 24 September 2026: £21,800
• 25 September 2026: £21,780
• 26 September 2026: £21,420
• 9 October 2026: £21,140
• 14 October 2026: £21,200
• 16 October 2026: £21,220
• 17 October 2026: £21,260

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 11 February 2027.

It has had 4 MOTs. The latest, on 5 February 2026, passed.

Advisories at the latest test: front brake pad(s) wearing thin; rear brake pad(s) wearing thin; nearside front brake disc worn, but not excessively; and 4 more.

Mileage at that test: 47,994 miles, which matches the advertised 50,000 miles.

Advertised mileage is about 5,900 miles higher 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, grey. Mileage: 50,000 miles. Price: £24,490, £3,230 more than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-696d9cef0d78
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, black. Mileage: 49,604 miles. Price: £24,197, £2,937 more than this car. Dealer: Halliwell Jones Warrington BMW in Warrington. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-69241d98b411
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 49,551 miles. Price: £20,990, £270 less than this car. Dealer: Avanti Motors in Darlington. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-0bab330089b7

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white, under a mile from this car. Mileage: 36,301 miles. Price: £24,220, £2,960 more than this car. Dealer: Hippo Approved in Blackburn. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-18ed4f3a8ce0