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: 18,655 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

This 2021 BMW 4 Series M Sport has covered 18,655 miles, around 25,400 fewer miles than is typical for its age. The dealer is asking £24,995, which is £2,040 below the AskCar estimate of £27,035. To work out the AskCar estimate, we analyse UK dealer adverts for 1,833 BMW 4 Series cars across different ages and specifications. The asking price is now £3,495 lower than when we first recorded the advert 64 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Partridge BMW in Eastleigh. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £2,040 (7%) under the AskCar estimate of £27,035.

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 1,833 priced BMW 4 Series adverts across different ages and specifications, as of 5 November 2026.

A 2021 BMW 4 Series with the 2.0 petrol engine is typically advertised at £24,000: the median of the 149 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2021 BMW 4 Series has been on sale for at least 64 days.

Price history

AskCar first saw this advert on 2 September 2026 at £28,490. Its asking price is now £24,995, £3,495 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 2 September 2026: £28,490
• 17 September 2026: £28,192
• 19 September 2026: £27,793
• 23 September 2026: £27,494
• 29 September 2026: £26,995
• 7 October 2026: £26,495
• 28 October 2026: £26,195
• 31 October 2026: £25,895
• 4 November 2026: £24,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 16 December 2026.

It has had 2 MOTs. The latest, on 10 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 17,943 miles, which matches the advertised 18,655 miles.

Advertised mileage is about 25,400 miles lower than the median mileage of a 2021 BMW 4 Series on AskCar.

Similar cars

48 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 5 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 18,000 miles. Price: £27,975, £2,980 more than this car. Dealer: Cottrell Motor Co in Warrington. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-5a0d0d43bfcd
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 21,725 miles. Price: £25,900, £905 more than this car. Dealer: Berry Chiswick BMW in Ealing. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-69856dfdc389
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 22,884 miles. Price: £24,549, £446 less than this car. Dealer: Motorpoint Norwich in Norwich. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-a2829217e2a0

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue, under a mile from this car. Mileage: 31,692 miles. Price: £25,795, £800 more than this car. Dealer: Partridge BMW in Eastleigh. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-ab00ad51f0d5