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: 32,611 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 32,611 miles on the clock, this 2023 BMW 4 Series M Sport has done roughly 4,300 more miles than a typical 2023 BMW 4 Series. The AskCar estimate for this car is £29,015. It is priced at £30,750, which is £1,735 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. We first recorded this advert 91 days ago, and its asking price has since fallen by £1,250. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Coventry BMW, based in Coventry. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,735 (5%) over the AskCar estimate of £29,015.

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 1,814 priced BMW 4 Series adverts across different ages and specifications, as of 4 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 4 November 2026.

Time on sale

This 2023 BMW 4 Series has been on sale for at least 91 days.

Price history

AskCar first saw this advert on 5 August 2026 at £32,000. Its asking price is now £30,750, £1,250 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 5 August 2026: £32,000
• 25 September 2026: £31,500
• 2 October 2026: £31,250
• 14 October 2026: £31,000
• 28 October 2026: £30,750

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 16 March 2027.

It has had one MOT, on 12 March 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 31,699 miles, which matches the advertised 32,611 miles.

Advertised mileage is about 4,300 miles higher than the median mileage of a 2023 BMW 4 Series on AskCar.

Similar cars

34 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 4 November 2026.

The 3 closest to this car in mileage:

• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, black. Mileage: 31,628 miles. Price: £29,600, £1,150 less than this car. Dealer: Vines of Guildford BMW in Guildford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-104990cd2204
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey. Mileage: 33,845 miles. Price: £30,990, £240 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, £4,649 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, grey, 19 miles from this car. Mileage: 51,622 miles. Price: £29,250, £1,500 less than this car. Dealer: Sytner Leicester BMW in Leicester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-7b10fb326995