2020 BMW 4 Series 3.0 435d M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 3.0 435d M Sport Auto 4WD Euro 6 (s/s) 2dr (309 bhp)
• Year: 2020
• Mileage: 52,000 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 169 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 52,000 miles on the clock, this 2020 BMW 4 Series M Sport has done roughly 9,500 more miles than a typical 2020 BMW 4 Series. The dealer is asking £21,780, which is £357 above the AskCar estimate of £21,423. To work out the AskCar estimate, we analyse UK dealer adverts for 1,787 BMW 4 Series cars across different ages and specifications. We first saw this car advertised 72 days ago. Its asking price has since fallen by £3,615. The latest recorded MOT expiry date is 15 October 2026, which has passed. Confirm its status with the dealer. We checked its advertised mileage against the government's MOT record, and they match. The seller is MINI UK at Stratstone Milton Keynes, based in Milton Keynes. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £357 (1%) over the AskCar estimate of £21,423.

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 1,787 priced BMW 4 Series adverts across different ages and specifications, as of 2 November 2026.

A 2020 BMW 4 Series with the 3.0 diesel engine is typically advertised at £21,800: the median of the 19 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2020 BMW 4 Series has been on sale for at least 72 days.

Price history

AskCar first saw this advert on 22 August 2026 at £25,395. Its asking price is now £21,780, £3,615 less. The latest price cut was seen on 1 November 2026.

Price changes recorded:

• 22 August 2026: £25,395
• 8 September 2026: £24,995
• 22 September 2026: £24,790
• 13 October 2026: £24,490
• 15 October 2026: £23,990
• 27 October 2026: £22,890
• 30 October 2026: £21,790
• 1 November 2026: £21,780

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: the latest record we hold ran out on 15 October 2026; ask the dealer for the current MOT.

It has had 4 MOTs. The latest, on 10 October 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 50,420 miles, which matches the advertised 52,000 miles.

Advertised mileage is about 9,500 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 £16,990 to £23,771, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW 4 Series M Sport, 3.0 diesel convertible, black. Mileage: 50,000 miles. Price: £21,999, £219 more than this car. Dealer: A & S Cars in Bishop's Stortford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-e985c2a56913
• 2020 BMW 4 Series M Sport, 3.0 diesel convertible, red. Mileage: 49,120 miles. Price: £18,995, £2,785 less than this car. Dealer: V12 Sports & Classics Ltd -Worksop in Worksop. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-1f49ad30acfd
• 2020 BMW 4 Series M Sport, 3.0 diesel convertible, black. Mileage: 55,825 miles. Price: £20,990, £790 less than this car. Dealer: Desmond Eastwood Motors in Lisburn. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-c7135de71067

• The nearest: 2020 BMW 4 Series M Sport, 3.0 diesel convertible, black, 31 miles from this car. Mileage: 26,507 miles. Price: £23,771, £1,991 more than this car. Dealer: Vindis Group Three10 Automotive in St Ives. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-8181065911a2