2018 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i M Sport Manual RWD Euro 6 (s/s) 2dr (181 bhp)
• Year: 2018
• Mileage: 28,885 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Manual
• Drive: Rear-wheel drive
• Colour: White
• CO2: 153 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 28,885 miles on the clock, this 2018 BMW 4 Series M Sport has done roughly 33,600 fewer miles than a typical 2018 BMW 4 Series. Priced at £14,600, it is advertised £1,642 below the AskCar estimate of £16,242. The AskCar estimate uses UK dealer asking prices, including 1,833 BMW 4 Series adverts, and accounts for the car’s age, mileage and specification. We first recorded this advert 30 days ago, and its asking price has since fallen by £900. The government's MOT record matches its advertised mileage. It is for sale at Car Planet Barnet in New Southgate. 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

Good value: £1,642 (10%) under the AskCar estimate of £16,242.

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 30 days.

Price history

AskCar first saw this advert on 6 October 2026 at £15,500. Its asking price is now £14,600, £900 less. The latest price cut was seen on 1 November 2026.

Price changes recorded:

• 6 October 2026: £15,500
• 21 October 2026: £15,200
• 26 October 2026: £14,900
• 1 November 2026: £14,600

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 18 March 2027.

It has had 9 MOTs. The latest, on 14 March 2026, passed.

Advisories at the latest test: rear brake pad(s) wearing thin.

Mileage at that test: 27,560 miles, which matches the advertised 28,885 miles.

Advertised mileage is about 33,600 miles lower than the median mileage of a 2018 BMW 4 Series on AskCar.