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 (s/s) 2dr (181 bhp)
• Year: 2018
• Mileage: 66,207 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: White
• CO2: 144 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 66,207 miles, this 2018 BMW 4 Series M Sport has covered about 3,800 more miles than other 2018 BMW 4 Series cars. The AskCar estimate for this car is £14,323. It is priced at £14,995, which is £672 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 1,833 BMW 4 Series cars across different ages and specifications. This car was first seen in our listings data 21 days ago. The recorded MOT expired on 21 October 2026, so ask the dealer whether it has been renewed. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by ARJ Motors in Addlestone. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £672 (4%) over the AskCar estimate of £14,323.

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 1,833 priced BMW 4 Series adverts across different ages and specifications, as of 5 November 2026.

A 2018 BMW 4 Series with the 2.0 petrol engine is typically advertised at £14,500: the median of the 117 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2018 BMW 4 Series has been on sale for at least 21 days.

Price history

AskCar first saw this advert on 15 October 2026 at £14,995. 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 5 November 2026: the latest record we hold ran out on 21 October 2026; ask the dealer for the current MOT.

It has had 6 MOTs. The latest, on 22 October 2025, passed.

Advisories at the latest test: nearside rear child seat fitted not allowing full inspection of adult belt.

Mileage at that test: 64,577 miles, which matches the advertised 66,207 miles.

Advertised mileage is about 3,800 miles higher than the median mileage of a 2018 BMW 4 Series on AskCar.

Similar cars

13 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 5 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 4 Series M Sport, 2.0 petrol convertible, black. Mileage: 50,616 miles. Price: £15,999, £1,004 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, grey. Mileage: 50,500 miles. Price: £15,620, £625 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, grey. Mileage: 48,228 miles. Price: £14,960, the same price as this car. Dealer: Evans Halshaw Kia Hull in Kingston upon Hull. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-90668f76e700