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: 18,097 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Green
• CO2: 144 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2023 BMW 4 Series M Sport has covered 18,097 miles, around 9,900 fewer miles than is typical for its age. The AskCar estimate for this car is £30,614. It is priced at £30,720, which is £106 above that estimate. 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. We first saw this car advertised 22 days ago. Its asking price has since fallen by £85. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Vertu Mercedes Slough, based in Slough. 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: £106 (under 1%) over the AskCar estimate of £30,614.

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 22 days.

Price history

AskCar first saw this advert on 14 October 2026 at £30,805. Its asking price is now £30,720, £85 less. The latest price cut was seen on 23 October 2026.

Price changes recorded:

• 14 October 2026: £30,805
• 15 October 2026: £30,799
• 16 October 2026: £30,789
• 17 October 2026: £30,792
• 18 October 2026: £30,829
• 20 October 2026: £30,793
• 21 October 2026: £30,838
• 22 October 2026: £30,817
• 23 October 2026: £30,720

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 6 October 2027.

It has had one MOT, on 7 October 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 18,211 miles, which matches the advertised 18,097 miles.

Advertised mileage is about 9,900 miles lower than the median mileage of a 2023 BMW 4 Series on AskCar.

Similar cars

22 other 2023 BMW 4 Series M Sport 2.0 petrol automatic coupes are for sale at UK dealers, from £24,980 to £34,995, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2023 BMW 4 Series M Sport, 2.0 petrol coupe, grey. Mileage: 17,191 miles. Price: £31,495, £775 more than this car. Dealer: A1 Auto Solutions in Maidenhead. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-047932d25df5
• 2023 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 19,250 miles. Price: £27,500, £3,220 less than this car. Dealer: German Autocentre in Sheffield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-1363aa9b75e0
• 2023 BMW 4 Series M Sport, 2.0 petrol coupe, grey. Mileage: 15,156 miles. Price: £30,995, £275 more than this car. Dealer: Park's Motor Group Douglas Park BMW Glasgow in Glasgow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-b854bdd1cf5c