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: 36,740 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2023 BMW 4 Series M Sport is advertised with 36,740 miles, approximately 8,400 above the typical mileage for its age. Priced at £30,000, it is advertised £1,643 above the AskCar estimate of £28,357. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. We first recorded this car for sale 1 day ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Sheffield BMW, based in Sheffield. 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: £1,643 (5%) over the AskCar estimate of £28,357.

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 £30,000. 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 4 January 2027.

It failed its MOT on 13 December 2025 (nearside rear tyre has ply or cords exposed inner edge of tread) and passed 5 days later, on 18 December 2025.

There were no advisories at the latest test.

Mileage at that test: 28,015 miles, which matches the advertised 36,740 miles.

Advertised mileage is about 8,400 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, grey. Mileage: 37,516 miles. Price: £27,899, £2,101 less than this car. Dealer: Motorpoint Edinburgh in Edinburgh. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-dc51962a578a
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, black. Mileage: 38,094 miles. Price: £30,975, £975 more than this car. Dealer: JMV Cars Ltd of Shorne in Gravesend. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-620f2d66ee04
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 33,951 miles. Price: £26,101, £3,899 less than this car. Dealer: Carsa Towcester in Towcester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-64fd96402bd5

• The nearest: 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey, 17 miles from this car. Mileage: 33,845 miles. Price: £30,990, £990 more than this car. Dealer: Stratstone Bmw Doncaster in Doncaster. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-eb92975469b2