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 2dr Step (181 bhp)
• Year: 2023
• Mileage: 33,845 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 154 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 33,845 miles on the clock, this 2023 BMW 4 Series M Sport has done roughly 5,500 more miles than a typical 2023 BMW 4 Series. The dealer is asking £30,990, which is £2,603 above the AskCar estimate of £28,387. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. This car was first seen in our listings data 1 day ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Stratstone Bmw Doncaster, based in Doncaster. 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

Above the going rate: £2,603 (9%) over the AskCar estimate of £28,387.

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

AskCar first saw this 2023 BMW 4 Series advertised 1 day ago. About 4 in 10 of 2023 BMW 4 Series cars are gone from sale within a month of being advertised: 79 of the 180 first advertised between 11 July 2026 and 1 October 2026.

Price history

AskCar first saw this advert on 3 November 2026 at £30,990. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 28 September 2027.

It has had one MOT, on 16 September 2026, and passed.

Advisories at the latest test: offside front lower windscreen damaged but not adversely affecting driver's view.

Mileage at that test: 25,396 miles, which matches the advertised 33,845 miles.

Advertised mileage is about 5,500 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, white. Mileage: 33,951 miles. Price: £26,101, £4,889 less than this car. Dealer: Carsa Towcester in Towcester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-64fd96402bd5
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey. Mileage: 32,611 miles. Price: £30,750, £240 less 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, black. Mileage: 31,628 miles. Price: £29,600, £1,390 less than this car. Dealer: Vines of Guildford BMW in Guildford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-104990cd2204

• The nearest: 2023 BMW 4 Series M Sport, 2.0 petrol convertible, black, 17 miles from this car. Mileage: 36,740 miles. Price: £30,000, £990 less than this car. Dealer: Sytner Sheffield BMW in Sheffield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-40fd3ac3c53e