2023 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i M Sport [Tech/Pro Pack] Auto RWD Euro 6 2dr Step (181 bhp)
• Year: 2023
• Mileage: 47,990 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Green
• CO2: 154 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 47,990 miles, this 2023 BMW 4 Series M Sport has covered about 19,900 more miles than other 2023 BMW 4 Series cars. The AskCar estimate for this car is £27,055. It is priced at £26,500, which is £555 below that estimate. The AskCar estimate uses UK dealer asking prices, including 1,826 BMW 4 Series adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 38 days ago, the asking price has dropped by £500. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Select Swindon, based in Swindon. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £555 (2%) under the AskCar estimate of £27,055.

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 1,826 priced BMW 4 Series adverts across different ages and specifications, as of 6 November 2026.

A 2023 BMW 4 Series with the 2.0 petrol engine is typically advertised at £29,600: the median of the 89 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2023 BMW 4 Series has been on sale for at least 38 days.

Price history

AskCar first saw this advert on 29 September 2026 at £27,000. Its asking price is now £26,500, £500 less. The latest price cut was seen on 31 October 2026.

Price changes recorded:

• 29 September 2026: £27,000
• 31 October 2026: £26,500

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 26 February 2027.

It has had one MOT, on 14 February 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 37,301 miles, which matches the advertised 47,990 miles.

Advertised mileage is about 19,900 miles higher than the median mileage of a 2023 BMW 4 Series on AskCar.

Similar cars

31 other 2023 BMW 4 Series M Sport 2.0 petrol automatic convertibles are for sale at UK dealers, from £25,999 to £33,990, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, blue. Mileage: 50,186 miles. Price: £28,193, £1,693 more than this car. Dealer: Group 1 Bedford BMW in Bedford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-dcefe1ba2b2f
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey. Mileage: 51,622 miles. Price: £29,250, £2,750 more than this car. Dealer: Sytner Leicester BMW in Leicester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-7b10fb326995
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, green. Mileage: 39,783 miles. Price: £32,491, £5,991 more than this car. Dealer: Your Next Car in Nottingham. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-6a3e095e2aca

• The nearest: 2023 BMW 4 Series M Sport, 2.0 petrol convertible, white, 28 miles from this car. Mileage: 33,951 miles. Price: £25,999, £501 less than this car. Dealer: Carsa Gloucester in Gloucester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-64fd96402bd5