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: 21,567 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: White
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2023 BMW 4 Series M Sport is advertised with 21,567 miles, approximately 6,800 below the typical mileage for its age. The dealer is asking £30,995, which is £425 above the AskCar estimate of £30,570. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. We have tracked this advert for 5 days. Its advertised mileage matches the government's MOT record. The seller is Lloyd Blackpool BMW, based in Blackpool. 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: £425 (1%) over the AskCar estimate of £30,570.

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 5 days 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 30 October 2026 at £30,995. 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 30 July 2027.

It failed its MOT on 1 July 2026 (nearside front tyre has a cut in excess of the requirements deep enough to reach the ply or cords; nearside rear tyre has a cut in excess of the requirements deep enough to reach the ply or cords) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 19,714 miles, which matches the advertised 21,567 miles.

Advertised mileage is about 6,800 miles lower 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: 21,567 miles. Price: £30,995, the same price as this car. Dealer: Lloyd Blackpool BMW in Blackpool. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-98b93f7a1843
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 21,975 miles. Price: £30,000, £995 less than this car. Dealer: Sandal BMW Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-9cb06791eddb
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey. Mileage: 23,000 miles. Price: £31,995, £1,000 more than this car. Dealer: Stratstone BMW Tunbridge Wells in Royal Tunbridge Wells. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-ef18502d2d40