2023 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i M Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)
• Year: 2023
• Mileage: 23,427 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 23,427 miles on the clock, this 2023 BMW 4 Series M Sport has done roughly 4,500 fewer miles than a typical 2023 BMW 4 Series. The dealer is asking £31,695, which is £1,277 above the AskCar estimate of £30,418. To work out the AskCar estimate, we analyse UK dealer adverts for 1,833 BMW 4 Series cars across different ages and specifications. The asking price is now £4,295 lower than when we first recorded the advert 84 days ago. You can find this car at Partridge BMW in Eastleigh. 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: £1,277 (4%) over the AskCar estimate of £30,418.

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 2023 BMW 4 Series with the 2.0 petrol engine is typically advertised at £29,900: the median of the 90 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2023 BMW 4 Series has been on sale for at least 84 days.

Price history

AskCar first saw this advert on 13 August 2026 at £35,990. Its asking price is now £31,695, £4,295 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 13 August 2026: £35,990
• 10 September 2026: £35,491
• 17 September 2026: £35,292
• 19 September 2026: £34,993
• 23 September 2026: £34,494
• 29 September 2026: £33,995
• 7 October 2026: £33,495
• 15 October 2026: £32,795
• 21 October 2026: £32,395
• 28 October 2026: £31,995
• 4 November 2026: £31,695

Mileage and MOT

Advertised mileage is about 4,500 miles lower than the median mileage of a 2023 BMW 4 Series on AskCar.

Similar cars

33 other 2023 BMW 4 Series M Sport 2.0 petrol automatic convertibles are for sale at UK dealers, from £26,101 to £33,990, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, green. Mileage: 23,401 miles. Price: £31,000, £695 less than this car. Dealer: Hedin Automotive Enfield BMW in Enfield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-3e1237447cb9
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey. Mileage: 23,000 miles. Price: £31,995, £300 more than this car. Dealer: Stratstone BMW Tunbridge Wells in Royal Tunbridge Wells. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-ef18502d2d40
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, blue. Mileage: 24,139 miles. Price: £33,000, £1,305 more than this car. Dealer: Berry Heathrow in Heathrow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-13b439dfa6d6

• The nearest: 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey, 37 miles from this car. Mileage: 27,913 miles. Price: £29,545, £2,150 less than this car. Dealer: Group 1 Reading BMW in Reading. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-4440585a9f2d