2018 BMW 4 Series 3.0 435d M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 3.0 435d M Sport Auto 4WD Euro 6 (s/s) 2dr (309 bhp)
• Year: 2018
• Mileage: 78,493 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 169 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 78,493 miles on the clock, this 2018 BMW 4 Series M Sport has done roughly 15,500 more miles than a typical 2018 BMW 4 Series. Priced at £18,000, it is advertised £1,646 above the AskCar estimate of £16,354. The AskCar estimate uses 1,814 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. It first appeared in our advert records 13 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner High Wycombe BMW, based in High Wycombe. 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

Above the going rate: £1,646 (10%) over the AskCar estimate of £16,354.

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 3.0 diesel engine is typically advertised at £17,500: the median of the 85 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2018 BMW 4 Series has been on sale for at least 13 days.

Price history

AskCar first saw this advert on 22 October 2026 at £18,000. 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 4 November 2026: valid until 16 January 2027.

It has had 6 MOTs. The latest, on 2 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 68,591 miles, which matches the advertised 78,493 miles.

Advertised mileage is about 15,500 miles higher than the median mileage of a 2018 BMW 4 Series on AskCar.

Similar cars

19 other 2018 BMW 4 Series M Sport 3.0 diesel automatic convertibles are for sale at UK dealers, from £12,995 to £20,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, beige. Mileage: 77,533 miles. Price: £17,750, £250 less than this car. Dealer: J S Exclusive Motors in Milton Keynes. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-44fd24ea924f
• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, black. Mileage: 71,411 miles. Price: £17,990, the same price as this car. Dealer: Brampton Motor Group in Brampton. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-f907f3b8ca99
• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, grey. Mileage: 86,195 miles. Price: £14,889, £3,111 less than this car. Dealer: Herts And Essex Motor Company in Hoddesdon. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-c0acfcb743be

• The nearest: 2018 BMW 4 Series M Sport, 3.0 diesel convertible, grey, 13 miles from this car. Mileage: 36,109 miles. Price: £20,100, £2,100 more than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-1a858a76ba39