2018 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 (Professional Media) (181 bhp)
• Year: 2018
• Mileage: 48,228 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 181 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW 4 Series M Sport has covered 48,228 miles, around 14,800 fewer miles than is typical for its age. Priced at £14,960, it is advertised £197 above the AskCar estimate of £14,763. The AskCar estimate uses 1,814 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this advert 61 days ago, and its asking price has since fallen by £1,030. Its advertised mileage matches the government's MOT record. The seller is Evans Halshaw Kia Hull, based in Hull. 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: £197 (1%) over the AskCar estimate of £14,763.

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 2018 BMW 4 Series with the 2.0 petrol engine is typically advertised at £14,500: the median of the 112 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2018 BMW 4 Series has been on sale for at least 61 days.

Price history

AskCar first saw this advert on 4 September 2026 at £15,990. Its asking price is now £14,960, £1,030 less. The latest price cut was seen on 20 October 2026.

Price changes recorded:

• 4 September 2026: £15,990
• 5 September 2026: £15,630
• 8 September 2026: £15,510
• 29 September 2026: £15,430
• 2 October 2026: £15,370
• 16 October 2026: £15,200
• 20 October 2026: £14,960

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 31 August 2027.

It has had 6 MOTs. The latest, on 6 August 2026, passed.

Advisories at the latest test: nearside rear tyre worn close to legal limit/worn on edge; offside rear tyre worn close to legal limit/worn on edge.

Mileage at that test: 47,917 miles, which matches the advertised 48,228 miles.

Advertised mileage is about 14,800 miles lower than the median mileage of a 2018 BMW 4 Series on AskCar.

Similar cars

12 other 2018 BMW 4 Series M Sport 2.0 petrol automatic convertibles are for sale at UK dealers, from £14,489 to £23,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 4 Series M Sport, 2.0 petrol convertible, grey. Mileage: 50,500 miles. Price: £15,620, £660 more than this car. Dealer: Wimbledon Carriage Company in East Horsley. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-deb8aefb9cc2
• 2018 BMW 4 Series M Sport, 2.0 petrol convertible, black. Mileage: 50,616 miles. Price: £15,999, £1,039 more than this car. Dealer: The PR7 Car Company in Chorley. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-ef591eb17927
• 2018 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 44,000 miles. Price: £14,489, £471 less than this car. Dealer: Berengrave Services in Gillingham. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-42092cdb1ca8