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 RWD Euro 6 (s/s) 2dr (187 bhp)
• Year: 2021
• Mileage: 54,749 miles
• Fuel: Diesel, mild hybrid
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 127 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 4 Series M Sport is advertised with 54,749 miles, approximately 10,600 above the typical mileage for its age. Its asking price of £23,490 is £550 above the AskCar estimate of £22,940. The AskCar estimate uses UK dealer asking prices, including 1,814 BMW 4 Series adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 33 days ago. Its asking price has since fallen by £2,500. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Stratstone BMW Milton Keynes, based in Milton Keynes. 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: £550 (2%) over the AskCar estimate of £22,940.

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 33 days.

Price history

AskCar first saw this advert on 2 October 2026 at £25,990. Its asking price is now £23,490, £2,500 less. The latest price cut was seen on 30 October 2026.

Price changes recorded:

• 2 October 2026: £25,990
• 13 October 2026: £25,590
• 24 October 2026: £24,490
• 30 October 2026: £23,490

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 17 December 2026.

It has had 2 MOTs. The latest, on 16 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 43,091 miles, which matches the advertised 54,749 miles.

Advertised mileage is about 10,600 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: 57,000 miles. Price: £22,990, £500 less than this car. Dealer: My Next Car in Sandy. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-e535ec62af1e
• 2021 BMW 4 Series M Sport, 2.0 diesel coupe, black. Mileage: 52,485 miles. Price: £22,000, £1,490 less than this car. Dealer: Peoples Falkirk in Falkirk. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-6be077ca9c2a
• 2021 BMW 4 Series M Sport, 2.0 diesel coupe, blue. Mileage: 57,500 miles. Price: £22,950, £540 less than this car. Dealer: Danson Motors in Sidcup. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-0df77e286ef4

• The nearest: 2021 BMW 4 Series M Sport, 2.0 diesel coupe, white, under a mile from this car. Mileage: 49,201 miles. Price: £23,890, £400 more than this car. Dealer: Stratstone BMW Milton Keynes in Milton Keynes. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-507f22632c2f