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: 31,628 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 31,628 miles on the clock, this 2023 BMW 4 Series M Sport has done roughly 3,700 more miles than a typical 2023 BMW 4 Series. Priced at £29,495, it is advertised £227 above the AskCar estimate of £29,268. The AskCar estimate uses UK dealer asking prices, including 1,833 BMW 4 Series adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 77 days ago, the asking price has dropped by £2,854. We checked its advertised mileage against the government's MOT record, and they match. The seller is Vines of Guildford BMW, based in Guildford. 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: £227 (under 1%) over the AskCar estimate of £29,268.

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 77 days.

Price history

AskCar first saw this advert on 20 August 2026 at £32,349. Its asking price is now £29,495, £2,854 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

• 20 August 2026: £32,349
• 27 August 2026: £31,916
• 2 September 2026: £31,583
• 9 September 2026: £31,303
• 16 September 2026: £30,992
• 22 September 2026: £30,853
• 27 September 2026: £30,512
• 6 October 2026: £30,910
• 17 October 2026: £29,995
• 24 October 2026: £29,750
• 29 October 2026: £29,600
• 5 November 2026: £29,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 2 June 2027.

It has had one MOT, on 3 June 2026, and passed.

Advisories at the latest test: offside front tyre worn close to legal limit/worn on edge; nearside front tyre slightly damaged sidewall.

Mileage at that test: 31,383 miles, which matches the advertised 31,628 miles.

Advertised mileage is about 3,700 miles higher 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, grey. Mileage: 32,611 miles. Price: £30,750, £1,255 more than this car. Dealer: Sytner Coventry BMW in Coventry. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-9640c3b9c591
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey. Mileage: 33,845 miles. Price: £30,990, £1,495 more than this car. Dealer: Stratstone Bmw Doncaster in Doncaster. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-eb92975469b2
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 33,951 miles. Price: £26,101, £3,394 less than this car. Dealer: Carsa Towcester in Towcester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-64fd96402bd5

• The nearest: 2023 BMW 4 Series M Sport, 2.0 petrol convertible, blue, 6 miles from this car. Mileage: 28,500 miles. Price: £29,994, £499 more than this car. Dealer: Wimbledon Carriage Company in East Horsley. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-fd28059334ac