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: 23,349 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 23,349 miles, around 4,800 fewer miles than is typical for its age. Its asking price of £29,500 is £22 above the AskCar estimate of £29,478. The AskCar estimate uses UK dealer asking prices, including 1,836 BMW 4 Series adverts, and accounts for the car’s age, mileage and specification. It first appeared in our advert records 1 day ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Marshall SEAT Leicester, based in Leicester. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 14 November 2026.

How we estimate prices and check cars

Price

Fair price: £22 (under 1%) over the AskCar estimate of £29,478.

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 1,836 priced BMW 4 Series adverts across different ages and specifications, as of 14 November 2026.

A 2023 BMW 4 Series with the 2.0 petrol engine is typically advertised at £29,000: the median of the 84 for sale on AskCar, as of 14 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: 88 of the 197 first advertised between 14 July 2026 and 11 October 2026.

Price history

AskCar first saw this advert on 13 November 2026 at £29,500. 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 14 November 2026: valid until 20 June 2027.

It has had one MOT, on 26 May 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 20,918 miles, which matches the advertised 23,349 miles.

Advertised mileage is about 4,800 miles lower than the median mileage of a 2023 BMW 4 Series on AskCar.

Similar cars

29 other 2023 BMW 4 Series M Sport 2.0 petrol automatic convertibles are for sale at UK dealers, from £25,999 to £33,990, as of 14 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: £30,500, £1,000 more 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: 23,000 miles. Price: £31,895, £2,395 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
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, blue. Mileage: 24,139 miles. Price: £32,200, £2,700 more than this car. Dealer: Berry Heathrow in Heathrow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-13b439dfa6d6

• The nearest: 2023 BMW 4 Series M Sport, 2.0 petrol convertible, grey, 2 miles from this car. Mileage: 51,622 miles. Price: £28,750, £750 less than this car. Dealer: Sytner Leicester BMW in Leicester. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-7b10fb326995