2021 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i M Sport [Pro Pack] Auto RWD Euro 6 2dr Step (181 bhp)
• Year: 2021
• Mileage: 53,139 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 144 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 53,139 miles, this 2021 BMW 4 Series M Sport has covered about 9,100 more miles than other 2021 BMW 4 Series cars. The AskCar estimate for this car is £22,503. It is priced at £22,100, which is £403 below that estimate. The AskCar estimate uses UK dealer asking prices, including 1,826 BMW 4 Series adverts, and accounts for the car’s age, mileage and specification. We first recorded this car for sale 36 days ago. Its advertised mileage matches the government's MOT record. It is for sale at Carsa Southampton in Fareham. 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: £403 (1%) under the AskCar estimate of £22,503.

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 36 days.

Price history

AskCar first saw this advert on 1 October 2026 at £21,408. Its asking price is now £22,100, £692 more.

Price changes recorded:

• 1 October 2026: £21,408
• 3 October 2026: £21,425
• 4 October 2026: £21,484
• 5 October 2026: £21,518
• 6 October 2026: £21,651
• 8 October 2026: £21,680
• 9 October 2026: £22,481
• 23 October 2026: £22,200
• 6 November 2026: £22,100

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 September 2027.

It has had 5 MOTs. The latest, on 8 September 2026, passed.

Advisories at the latest test: nearside front shock absorbers has light misting of oil; offside front shock absorbers has light misting of oil; rear brake pad(s) wearing thin.

Mileage at that test: 52,666 miles, which matches the advertised 53,139 miles.

Advertised mileage is about 9,100 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, black. Mileage: 52,834 miles. Price: £22,995, £895 more than this car. Dealer: Eaglesham Garage in Glasgow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-a8f823dfb3a3
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 52,743 miles. Price: £24,500, £2,400 more than this car. Dealer: John Clark BMW Tayside in Dundee. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-e3237e0d284e
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 51,644 miles. Price: £22,950, £850 more than this car. Dealer: Lloyd Newcastle BMW in Newcastle upon Tyne. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-9adf32c11a64

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white, 7 miles from this car. Mileage: 18,655 miles. Price: £24,995, £2,895 more than this car. Dealer: Partridge BMW in Eastleigh. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-8cead9a1aa96