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: 28,622 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

This 2021 BMW 4 Series M Sport has covered 28,622 miles, around 15,400 fewer miles than is typical for its age. Priced at £23,985, it is advertised £1,825 below the AskCar estimate of £25,810. To work out the AskCar estimate, we analyse UK dealer adverts for 1,826 BMW 4 Series cars across different ages and specifications. We first recorded this advert 59 days ago, and its asking price has since fallen by £2,505. Its advertised mileage matches the government's MOT record. The seller is Williams Bmw Manchester, based in Manchester. 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: £1,825 (7%) under the AskCar estimate of £25,810.

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 59 days.

Price history

AskCar first saw this advert on 8 September 2026 at £26,490. Its asking price is now £23,985, £2,505 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 8 September 2026: £26,490
• 22 September 2026: £25,975
• 7 October 2026: £25,485
• 21 October 2026: £24,975
• 4 November 2026: £23,985

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 January 2027.

It has had 3 MOTs. The latest, on 10 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 24,802 miles, which matches the advertised 28,622 miles.

Advertised mileage is about 15,400 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, blue. Mileage: 28,502 miles. Price: £24,799, £814 more than this car. Dealer: Fords of Winsford Manchester in Manchester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-029b5d1c5ee2
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 29,199 miles. Price: £23,099, £886 less than this car. Dealer: Motorpoint Chingford in Chingford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-c727067e39f2
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 28,025 miles. Price: £22,349, £1,636 less than this car. Dealer: Motorpoint Oldbury in Oldbury. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-1e94fcfa8fd3