2020 BMW 4 Series 3.0 430d M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 3.0 430d M Sport Auto RWD Euro 6 2dr (Professional Media) (254 bhp)
• Year: 2020
• Mileage: 68,400 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 254 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 180 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 BMW 4 Series M Sport has covered 68,400 miles, around 25,300 more miles than is typical for its age. The AskCar estimate for this car is £17,042. It is priced at £16,890, which is £152 below that estimate. The AskCar estimate draws on 1,833 BMW 4 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. Since we first spotted the advert 30 days ago, the asking price has dropped by £509. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Nexa Motor Group, based in Southampton. 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

Fair price: £152 (under 1%) under the AskCar estimate of £17,042.

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 2020 BMW 4 Series with the 3.0 diesel engine is typically advertised at £21,900: the median of the 20 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2020 BMW 4 Series has been on sale for at least 30 days.

Price history

AskCar first saw this advert on 6 October 2026 at £17,399. Its asking price is now £16,890, £509 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

• 6 October 2026: £17,399
• 12 October 2026: £17,290
• 28 October 2026: £16,990
• 5 November 2026: £16,890

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 25 January 2027.

It has had 5 MOTs. The latest, on 26 January 2026, passed.

Advisories at the latest test: offside rear tyre worn close to legal limit/worn on edge; offside rear tyre slightly damaged/cracking or perishing; nearside front shock spring perch close to tyre.

Mileage at that test: 64,827 miles, which matches the advertised 68,400 miles.

Advertised mileage is about 25,300 miles higher than the median mileage of a 2020 BMW 4 Series on AskCar.

Similar cars

8 other 2020 BMW 4 Series M Sport 3.0 diesel automatic convertibles are for sale at UK dealers, from £18,395 to £23,771, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW 4 Series M Sport, 3.0 diesel convertible, white. Mileage: 58,975 miles. Price: £19,989, £3,099 more than this car. Dealer: The Hertford Car Company in Hertford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-4ead0610929e
• 2020 BMW 4 Series M Sport, 3.0 diesel convertible, black. Mileage: 55,825 miles. Price: £20,990, £4,100 more than this car. Dealer: Desmond Eastwood Motors in Lisburn. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-c7135de71067
• 2020 BMW 4 Series M Sport, 3.0 diesel convertible, black. Mileage: 52,000 miles. Price: £21,780, £4,890 more than this car. Dealer: MINI UK at Stratstone Milton Keynes in Milton Keynes. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-72852cef1e21