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: 33,750 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• CO2: 169 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 33,750 miles, this 2018 BMW 4 Series M Sport has covered about 29,300 fewer miles than other 2018 BMW 4 Series cars. The dealer is asking £18,650, which is £3,009 below the AskCar estimate of £21,659. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. We first recorded this advert 98 days ago, and its asking price has since fallen by £3,200. You can find this car at Gold Prestige Cars in Uckfield. 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

Good value: £3,009 (13%) under the AskCar estimate of £21,659.

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 98 days.

Price history

AskCar first saw this advert on 29 July 2026 at £21,850. Its asking price is now £18,650, £3,200 less. The latest price cut was seen on 17 October 2026.

Price changes recorded:

• 29 July 2026: £21,850
• 30 July 2026: £21,750
• 12 August 2026: £22,300
• 23 August 2026: £22,400
• 3 September 2026: £22,550
• 7 September 2026: £21,400
• 17 September 2026: £20,999
• 16 October 2026: £18,950
• 17 October 2026: £18,650

Mileage and MOT

Advertised mileage is about 29,300 miles lower 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, grey. Mileage: 36,109 miles. Price: £20,100, £1,450 more than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-1a858a76ba39
• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, grey. Mileage: 31,000 miles. Price: £18,999, £349 more than this car. Dealer: Cars Of London in London. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-71b3e18742c5
• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, white. Mileage: 43,935 miles. Price: £19,990, £1,340 more than this car. Dealer: Fox's Motor Co in Oundle. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-55c338323dfd

• The nearest: 2018 BMW 4 Series M Sport, 3.0 diesel convertible, grey, 33 miles from this car. Mileage: 52,000 miles. Price: £18,880, £230 more than this car. Dealer: Albury Motor Co in Guildford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-f64408d3fab4