2021 BMW 4 Series 2.0 430i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 430i M Sport Auto RWD Euro 6 (s/s) 2dr (254 bhp)
• Year: 2021
• Mileage: 19,700 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 254 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 167 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 4 Series M Sport has covered 19,700 miles, around 24,700 fewer miles than is typical for its age. Its asking price of £28,990 is £615 above the AskCar estimate of £28,375. The AskCar estimate uses 1,836 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. This car was first seen in our listings data today. The government's MOT record matches its advertised mileage. You can find this car at BSB Automotive in Dartford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 14 November 2026.

How we estimate prices and check cars

Price

Fair price: £615 (2%) over the AskCar estimate of £28,375.

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 1,836 priced BMW 4 Series adverts across different ages and specifications, as of 14 November 2026.

A 2021 BMW 4 Series with the 2.0 petrol engine is typically advertised at £23,500: the median of the 150 for sale on AskCar, as of 14 November 2026.

Time on sale

AskCar first saw this 2021 BMW 4 Series advertised today. About 4 in 10 of 2021 BMW 4 Series cars are gone from sale within a month of being advertised: 115 of the 274 first advertised between 14 July 2026 and 11 October 2026.

Price history

AskCar first saw this advert on 14 November 2026 at £28,990. 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 14 November 2026: valid until 29 March 2027.

It has had 4 MOTs. The latest, on 18 March 2026, passed.

Advisories at the latest test: offside front tyre slightly damaged/cracking or perishing perished; nearside rear child seat fitted not allowing full inspection of adult belt.

Mileage at that test: 16,721 miles, which matches the advertised 19,700 miles.

Advertised mileage is about 24,700 miles lower than the median mileage of a 2021 BMW 4 Series on AskCar.

Similar cars

25 other 2021 BMW 4 Series M Sport 2.0 petrol automatic convertibles are for sale at UK dealers, from £18,990 to £33,950, as of 14 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 4 Series M Sport, 2.0 petrol convertible, grey. Mileage: 17,141 miles. Price: £28,495, £495 less than this car. Dealer: Vertu BMW Exeter in Exeter. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-d184ad7440ea
• 2021 BMW 4 Series M Sport, 2.0 petrol convertible, black. Mileage: 22,399 miles. Price: £27,195, £1,795 less than this car. Dealer: John Clark BMW Tayside in Dundee. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-9751e81829b1
• 2021 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 24,000 miles. Price: £25,995, £2,995 less than this car. Dealer: West Motor Company Kingston in New Malden. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-45cda3c123a3

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol convertible, black, 9 miles from this car. Mileage: 65,000 miles. Price: £22,988, £6,002 less than this car. Dealer: West Kent Motor Group Online in Sevenoaks. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-dfed66a66f81