2018 BMW 4 Series 2.0 420i Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: Sport
• Version: 2.0 420i Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)
• Year: 2018
• Mileage: 29,486 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 144 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 29,486 miles, this 2018 BMW 4 Series Sport has covered about 33,500 fewer miles than other 2018 BMW 4 Series cars. The AskCar estimate for this car is £16,521. It is priced at £17,000, which is £479 above that estimate. The AskCar estimate uses UK dealer asking prices, including 1,816 BMW 4 Series adverts, and accounts for the car’s age, mileage and specification. We have tracked this advert for 12 days. Its advertised mileage matches the government's MOT record. You can find this car at A P Hynes And Co in Altrincham. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 8 November 2026.

How we estimate prices and check cars

Price

Fair price: £479 (2%) over the AskCar estimate of £16,521.

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 1,816 priced BMW 4 Series adverts across different ages and specifications, as of 8 November 2026.

A 2018 BMW 4 Series with the 2.0 petrol engine is typically advertised at £14,500: the median of the 120 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2018 BMW 4 Series has been on sale for at least 12 days.

Price history

AskCar first saw this advert on 27 October 2026 at £17,000. 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 8 November 2026: valid until 1 September 2027.

It failed its MOT on 2 September 2026 (nearside front tyre has ply or cords exposed 225/40/19/93y) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 29,379 miles, which matches the advertised 29,486 miles.

Advertised mileage is about 33,500 miles lower than the median mileage of a 2018 BMW 4 Series on AskCar.

Similar cars

2 other 2018 BMW 4 Series Sport 2.0 petrol automatic convertibles are for sale at UK dealers, from £12,995 to £17,110, as of 8 November 2026.

The 2 closest to this car in mileage:

• 2018 BMW 4 Series Sport, 2.0 petrol convertible, black. Mileage: 31,178 miles. Price: £17,110, £110 more than this car. Dealer: Evans Halshaw Ford Milton Keynes in Milton Keynes. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-abcdf37b605f
• 2018 BMW 4 Series Sport, 2.0 petrol convertible, blue. Mileage: 67,759 miles. Price: £12,995, £4,005 less than this car. Dealer: Parkland Motors in Costock. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-58de5e4f5f2e