2018 BMW 4 Series 2.0 420d M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420d M Sport Auto RWD Euro 6 2dr (Professional Media) (187 bhp)
• Year: 2018
• Mileage: 29,068 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: White
• CO2: 156 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW 4 Series M Sport is advertised with 29,068 miles, approximately 33,900 below the typical mileage for its age. The dealer is asking £16,997, which is £106 below the AskCar estimate of £17,103. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. The asking price is now £997 lower than when we first recorded the advert 33 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Lookers Car Hub South Shields, based in South Shields. 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: £106 (under 1%) under the AskCar estimate of £17,103.

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 diesel 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 33 days.

Price history

AskCar first saw this advert on 2 October 2026 at £17,994. Its asking price is now £16,997, £997 less. The latest price cut was seen on 1 November 2026.

Price changes recorded:

• 2 October 2026: £17,994
• 5 October 2026: £17,993
• 9 October 2026: £17,991
• 10 October 2026: £17,990
• 13 October 2026: £17,989
• 19 October 2026: £17,988
• 24 October 2026: £16,999
• 27 October 2026: £16,998
• 1 November 2026: £16,997

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 29 December 2026.

It has had 7 MOTs. The latest, on 15 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 28,914 miles, which matches the advertised 29,068 miles.

Advertised mileage is about 33,900 miles lower than the median mileage of a 2018 BMW 4 Series on AskCar.

Similar cars

11 other 2018 BMW 4 Series M Sport 2.0 diesel automatic convertibles are for sale at UK dealers, from £13,490 to £17,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 4 Series M Sport, 2.0 diesel convertible, grey. Mileage: 28,699 miles. Price: £17,995, £998 more than this car. Dealer: The Plough Garage in Farnham. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-6ce2940f3e23
• 2018 BMW 4 Series M Sport, 2.0 diesel convertible. Mileage: 31,600 miles. Price: £16,795, £202 less than this car. Dealer: Prestige Performance (Yorkshire) in North Duffield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-4a86097e9ea3
• 2018 BMW 4 Series M Sport, 2.0 diesel convertible, blue. Mileage: 33,822 miles. Price: £17,495, £498 more than this car. Dealer: Sycamore Stamford in Stamford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-6c3044b519ae

• The nearest: 2018 BMW 4 Series M Sport, 2.0 diesel convertible, black, 30 miles from this car. Mileage: 63,918 miles. Price: £13,490, £3,507 less than this car. Dealer: Driven Car Sales in Stockton-on-Tees. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-b0f30e957646