2021 BMW 4 Series 2.0 420d MHT M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420d MHT M Sport Auto 4WD Euro 6 (s/s) 2dr (187 bhp)
• Year: 2021
• Mileage: 73,131 miles
• Fuel: Diesel, mild hybrid
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Blue
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 73,131 miles on the clock, this 2021 BMW 4 Series M Sport has done roughly 29,000 more miles than a typical 2021 BMW 4 Series. Priced at £19,350, it is advertised £739 below the AskCar estimate of £20,089. 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 advert 41 days ago, and its asking price has since fallen by £1,550. Its advertised mileage matches the government's MOT record. You can find this car at Car Planet Watford in Rickmansworth. 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: £739 (3%) under the AskCar estimate of £20,089.

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 diesel 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 41 days.

Price history

AskCar first saw this advert on 24 September 2026 at £20,900. Its asking price is now £19,350, £1,550 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 24 September 2026: £20,900
• 5 October 2026: £20,600
• 16 October 2026: £20,300
• 21 October 2026: £20,000
• 28 October 2026: £19,700
• 3 November 2026: £19,400
• 4 November 2026: £19,350

Mileage and MOT

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

It failed its MOT on 27 July 2026 (front registration plate does not conform to the specified requirements cracked plate; rear registration plate does not conform to the specified requirements very poor condition) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 72,458 miles, which matches the advertised 73,131 miles.

Advertised mileage is about 29,000 miles higher than the median mileage of a 2021 BMW 4 Series on AskCar.

Similar cars

35 other 2021 BMW 4 Series M Sport 2.0 diesel automatic coupes are for sale at UK dealers, from £17,490 to £26,500, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 4 Series M Sport, 2.0 diesel coupe, black. Mileage: 72,900 miles. Price: £19,490, £140 more than this car. Dealer: S James Prestige in Essendine. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-c37970f3bdf4
• 2021 BMW 4 Series M Sport, 2.0 diesel coupe, white. Mileage: 68,500 miles. Price: £21,270, £1,920 more than this car. Dealer: Motionmotorgroup in Market Harborough. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-9cb90111166c
• 2021 BMW 4 Series M Sport, 2.0 diesel coupe, blue. Mileage: 68,086 miles. Price: £20,450, £1,100 more than this car. Dealer: Parkway Motor Group in Edwinstowe. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-e6e428864a36

• The nearest: 2021 BMW 4 Series M Sport, 2.0 diesel coupe, black, 15 miles from this car. Mileage: 34,848 miles. Price: £23,995, £4,645 more than this car. Dealer: A1 Auto Solutions in Maidenhead. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-5e810c1fe515