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: 23,000 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 154 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2023 BMW 4 Series M Sport has covered 23,000 miles, around 5,300 fewer miles than is typical for its age. The dealer is asking £31,995, which is £2,073 above the AskCar estimate of £29,922. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. It first appeared in our advert records today. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Stratstone BMW Tunbridge Wells, based in Tunbridge Wells. 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: £2,073 (6%) over the AskCar estimate of £29,922.

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 today. 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 4 November 2026 at £31,995. 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 has had one MOT, on 7 July 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 21,980 miles, which matches the advertised 23,000 miles.

Advertised mileage is about 5,300 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, green. Mileage: 23,401 miles. Price: £31,000, £995 less than this car. Dealer: Hedin Automotive Enfield BMW in Enfield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-3e1237447cb9
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey. Mileage: 23,427 miles. Price: £31,695, £300 less than this car. Dealer: Partridge BMW in Eastleigh. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-caf928c861cf
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 21,975 miles. Price: £30,000, £1,995 less than this car. Dealer: Sandal BMW Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-9cb06791eddb

• The nearest: 2023 BMW 4 Series M Sport, 2.0 petrol convertible, black, 19 miles from this car. Mileage: 38,094 miles. Price: £30,975, £1,020 less than this car. Dealer: JMV Cars Ltd of Shorne in Gravesend. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-620f2d66ee04