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: 27,903 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2023 BMW 4 Series M Sport is 27,903 miles. Its asking price of £29,990 is £397 above the AskCar estimate of £29,593. The AskCar estimate draws on 1,787 BMW 4 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. Since we first spotted the advert 45 days ago, the asking price has dropped by £1,000. We checked its advertised mileage against the government's MOT record, and they match. The seller is Barretts BMW Ashford, based in Ashford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £397 (1%) over the AskCar estimate of £29,593.

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 1,787 priced BMW 4 Series adverts across different ages and specifications, as of 2 November 2026.

A 2023 BMW 4 Series with the 2.0 petrol engine is typically advertised at £29,500: the median of the 82 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2023 BMW 4 Series has been on sale for at least 45 days.

Price history

AskCar first saw this advert on 18 September 2026 at £30,990. Its asking price is now £29,990, £1,000 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 18 September 2026: £30,990
• 3 October 2026: £30,790
• 9 October 2026: £30,490
• 27 October 2026: £29,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 28 March 2027.

It has had one MOT, on 17 March 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 24,463 miles, which matches the advertised 27,903 miles.

Advertised mileage is about 600 miles lower than the median mileage of a 2023 BMW 4 Series on AskCar.

Similar cars

27 other 2023 BMW 4 Series M Sport 2.0 petrol automatic convertibles are for sale at UK dealers, from £26,335 to £33,990, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, blue. Mileage: 27,908 miles. Price: £29,995, the same price as this car. Dealer: Barretts BMW Ashford in Ashford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-a71af739daae
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, blue. Mileage: 28,500 miles. Price: £29,994, the same price as this car. Dealer: Wimbledon Carriage Company in East Horsley. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-fd28059334ac
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 28,614 miles. Price: £29,550, £440 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-b77c765862fe