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: 49,604 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 151 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 4 Series M Sport has covered 49,604 miles, around 5,500 more miles than is typical for its age. Priced at £24,197, it is advertised £1,199 above the AskCar estimate of £22,998. 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 saw this car advertised 17 days ago. Its asking price has since fallen by £293. We checked its advertised mileage against the government's MOT record, and they match. The seller is Halliwell Jones Warrington BMW, based in Warrington. 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: £1,199 (5%) over the AskCar estimate of £22,998.

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 17 days.

Price history

AskCar first saw this advert on 20 October 2026 at £24,490. Its asking price is now £24,197, £293 less. The latest price cut was seen on 6 November 2026.

Price changes recorded:

• 20 October 2026: £24,490
• 6 November 2026: £24,197

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 15 November 2026.

It has had 3 MOTs. The latest, on 16 October 2025, passed.

Advisories at the latest test: under trays obscuring some parts front+rear.

Mileage at that test: 38,370 miles, which matches the advertised 49,604 miles.

Advertised mileage is about 5,500 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, white. Mileage: 49,551 miles. Price: £20,990, £3,207 less than this car. Dealer: Avanti Motors in Darlington. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-0bab330089b7
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 50,000 miles. Price: £21,260, £2,937 less than this car. Dealer: Hippo Approved in Blackburn. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-70926018b5c3
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, grey. Mileage: 50,000 miles. Price: £24,490, £293 more than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-696d9cef0d78

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue, under a mile from this car. Mileage: 18,000 miles. Price: £27,975, £3,778 more than this car. Dealer: Cottrell Motor Co in Warrington. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-5a0d0d43bfcd