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: 65,729 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Blue
• CO2: 169 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 65,729 miles on the clock, this 2018 BMW 4 Series M Sport has done roughly 3,300 more miles than a typical 2018 BMW 4 Series. The dealer is asking £19,950, which is £2,024 above the AskCar estimate of £17,926. To work out the AskCar estimate, we analyse UK dealer adverts for 1,833 BMW 4 Series cars across different ages and specifications. Since we first spotted the advert 37 days ago, the asking price has dropped by £1,045. We checked its advertised mileage against the government's MOT record, and they match. The seller is Sytner Stevenage BMW, based in Stevenage. 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

Above the going rate: £2,024 (11%) over the AskCar estimate of £17,926.

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 3.0 diesel engine is typically advertised at £17,500: the median of the 84 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2018 BMW 4 Series has been on sale for at least 37 days.

Price history

AskCar first saw this advert on 29 September 2026 at £20,995. Its asking price is now £19,950, £1,045 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

• 29 September 2026: £20,995
• 5 November 2026: £19,950

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 27 April 2027.

It has had 6 MOTs. The latest, on 1 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 64,154 miles, which matches the advertised 65,729 miles.

Advertised mileage is about 3,300 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 £12,795 to £20,100, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, blue. Mileage: 70,000 miles. Price: £14,995, £4,955 less than this car. Dealer: Moss Prestige in Huddersfield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-cfe3b6a5c5f7
• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, blue. Mileage: 61,039 miles. Price: £15,750, £4,200 less than this car. Dealer: Mats Garage in Goole. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-45e60f32b4e5
• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, blue. Mileage: 70,430 miles. Price: £19,400, £550 less than this car. Dealer: Brook Cars Company in Telford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-49388ee41d84

• The nearest: 2018 BMW 4 Series M Sport, 3.0 diesel convertible, grey, 13 miles from this car. Mileage: 86,195 miles. Price: £14,889, £5,061 less than this car. Dealer: Herts And Essex Motor Company in Hoddesdon. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-c0acfcb743be