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: 18,000 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

With 18,000 miles on the clock, this 2021 BMW 4 Series M Sport has done roughly 26,100 fewer miles than a typical 2021 BMW 4 Series. Priced at £27,975, it is advertised £775 above the AskCar estimate of £27,200. The AskCar estimate draws on 1,814 BMW 4 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this car for sale 35 days ago. The government's MOT record matches its advertised mileage. You can find this car at Cottrell Motor Co in Warrington. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £775 (2%) over the AskCar estimate of £27,200.

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 1,814 priced BMW 4 Series adverts across different ages and specifications, as of 4 November 2026.

A 2021 BMW 4 Series with the 2.0 petrol engine is typically advertised at £24,000: the median of the 144 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 BMW 4 Series has been on sale for at least 35 days.

Price history

AskCar first saw this advert on 30 September 2026 at £27,975. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 8 May 2027.

It failed its MOT on 27 April 2026 (nearside rear tyre has a bulge, caused by separation or partial failure of its structure) and passed 1 day later, on 28 April 2026.

There were no advisories at the latest test.

Mileage at that test: 17,769 miles, which matches the advertised 18,000 miles.

Advertised mileage is about 26,100 miles lower than the median mileage of a 2021 BMW 4 Series on AskCar.

Similar cars

45 other 2021 BMW 4 Series M Sport 2.0 petrol automatic coupes are for sale at UK dealers, from £17,490 to £27,000, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 18,655 miles. Price: £24,995, £2,980 less than this car. Dealer: Partridge BMW in Eastleigh. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-8cead9a1aa96
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 21,725 miles. Price: £25,900, £2,075 less 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, £3,426 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, black, under a mile from this car. Mileage: 49,604 miles. Price: £24,490, £3,485 less than this car. Dealer: Halliwell Jones Warrington BMW in Warrington. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-69241d98b411