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 2dr Step (181 bhp)
• Year: 2021
• Mileage: 36,929 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 36,929 miles, this 2021 BMW 4 Series M Sport has covered about 7,100 fewer miles than other 2021 BMW 4 Series cars. Priced at £22,498, it is advertised £2,038 below the AskCar estimate of £24,536. The AskCar estimate draws on 1,833 BMW 4 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 48 days ago. Its asking price has since fallen by £500. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Arnold Clark Wallsend Silverlink Citroen / Peugeot / Jeep / OMODA / JAECOO, based in Wallsend. 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

Good value: £2,038 (8%) under the AskCar estimate of £24,536.

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 48 days.

Price history

AskCar first saw this advert on 18 September 2026 at £22,998. Its asking price is now £22,498, £500 less. The latest price cut was seen on 21 October 2026.

Price changes recorded:

• 18 September 2026: £22,998
• 22 September 2026: £23,998
• 27 September 2026: £23,498
• 6 October 2026: £23,998
• 9 October 2026: £22,998
• 21 October 2026: £22,498

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 19 June 2027.

It has had 4 MOTs. The latest, on 17 June 2026, passed.

Advisories at the latest test: rear brake pad(s) wearing thin.

Mileage at that test: 35,141 miles, which matches the advertised 36,929 miles.

Advertised mileage is about 7,100 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, red. Mileage: 37,000 miles. Price: £25,850, £3,352 more than this car. Dealer: A & S Cars in Bishop's Stortford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-eb34f1d39444
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 36,484 miles. Price: £22,949, £451 more than this car. Dealer: Motorpoint Glasgow in Glasgow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-0818ea1bca21
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 36,301 miles. Price: £24,220, £1,722 more than this car. Dealer: Hippo Approved in Blackburn. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-18ed4f3a8ce0

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue, 6 miles from this car. Mileage: 51,644 miles. Price: £23,450, £952 more than this car. Dealer: Lloyd Newcastle BMW in Newcastle upon Tyne. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-9adf32c11a64