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: 45,100 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 45,100 miles. The AskCar estimate for this car is £23,706. It is priced at £22,990, which is £716 below that estimate. The AskCar estimate uses 1,814 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this car for sale 28 days ago. Its advertised mileage matches the government's MOT record. It is advertised by S James Prestige in Stamford. 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: £716 (3%) under the AskCar estimate of £23,706.

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 28 days.

Price history

AskCar first saw this advert on 7 October 2026 at £22,990. 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 22 August 2027.

It has had 3 MOTs. The latest, on 17 August 2026, passed.

Advisories at the latest test: nearside rear tyre worn close to legal limit/worn on edge; offside front lower suspension arm ball joint has slight play.

Mileage at that test: 43,624 miles, which matches the advertised 45,100 miles.

Advertised mileage is about 1,000 miles higher 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 £27,975, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, black. Mileage: 44,827 miles. Price: £23,000, the same price as this car. Dealer: Colin Ludwell Cars in Bristol. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-31c98146fd08
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, black. Mileage: 44,433 miles. Price: £25,000, £2,010 more than this car. Dealer: John Clark BMW Tayside in Dundee. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-6d5b2f36f93e
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 47,631 miles. Price: £26,990, £4,000 more than this car. Dealer: Car City UK Catterick in Catterick. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-d6ee91adc88a

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, blue, under a mile from this car. Mileage: 42,300 miles. Price: £23,490, £500 more than this car. Dealer: S James Prestige in Essendine. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-2049ec2a15d6