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: 37,516 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 is advertised with 37,516 miles, approximately 9,200 above the typical mileage for its age. The dealer is asking £27,899, which is £85 above the AskCar estimate of £27,814. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. Since we first spotted the advert 48 days ago, the asking price has dropped by £2,400. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Motorpoint Edinburgh, based in Edinburgh. 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: £85 (under 1%) over the AskCar estimate of £27,814.

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

This 2023 BMW 4 Series has been on sale for at least 48 days.

Price history

AskCar first saw this advert on 17 September 2026 at £30,299. Its asking price is now £27,899, £2,400 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 17 September 2026: £30,299
• 18 September 2026: £28,749
• 22 September 2026: £28,949
• 29 September 2026: £28,749
• 6 October 2026: £28,599
• 13 October 2026: £28,349
• 4 November 2026: £27,899

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 7 March 2027.

It has had one MOT, on 13 February 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 31,248 miles, which matches the advertised 37,516 miles.

Advertised mileage is about 9,200 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, black. Mileage: 38,094 miles. Price: £30,975, £3,076 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, black. Mileage: 36,740 miles. Price: £30,000, £2,101 more than this car. Dealer: Sytner Sheffield BMW in Sheffield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-40fd3ac3c53e
• 2023 BMW 4 Series M Sport, 2.0 petrol convertible, green. Mileage: 39,783 miles. Price: £32,491, £4,592 more than this car. Dealer: Your Next Car in Nottingham. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-6a3e095e2aca

• The nearest: 2023 BMW 4 Series M Sport, 2.0 petrol convertible, blue, 64 miles from this car. Mileage: 7,216 miles. Price: £32,498, £4,599 more than this car. Dealer: Arnold Clark Dumfries Bmw Mini Geely in Dumfries. AskCar page: https://askcar.co.uk/car/bmw-4-series-2023-7d8a534cca36