2018 BMW 4 Series 3.0 435d M Sport
Price: £20,100. Fair price: £1,245 (5%) under the AskCar estimate of £21,345, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,833 priced BMW 4 Series adverts on AskCar as of 5 November 2026.
AskCar lists 1,879 used BMW 4 Series from 1,081 UK dealerships, as of 5 November 2026.
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: 36,109 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 36,109 miles on the clock, this 2018 BMW 4 Series M Sport has done roughly 26,300 fewer miles than a typical 2018 BMW 4 Series. The AskCar estimate for this car is £21,345. It is priced at £20,100, which is £1,245 below that estimate. The AskCar estimate draws on 1,833 BMW 4 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 13 days ago. Its advertised mileage matches the government's MOT record. It is advertised by Car Planet Watford in Rickmansworth. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 5 November 2026.
Price
Fair price: £1,245 (5%) under the AskCar estimate of £21,345.
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 13 days.
Price history
AskCar first saw this advert on 23 October 2026 at £20,100. 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 5 November 2026: valid until 25 February 2027.
It has had 6 MOTs. The latest, on 23 February 2026, passed.
Advisories at the latest test: all brake discs pitted and starting to groove.
Mileage at that test: 35,607 miles, which matches the advertised 36,109 miles.
Advertised mileage is about 26,300 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 £12,795 to £19,990, as of 5 November 2026.
The 3 closest to this car in mileage:
- 2018 BMW 4 Series M Sport, 3.0 diesel convertible. Mileage: 33,750 miles. Price: £18,650, £1,450 less than this car. Dealer: Gold Prestige Cars in Uckfield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-5049eeac8927
- 2018 BMW 4 Series M Sport, 3.0 diesel convertible, grey. Mileage: 31,000 miles. Price: £18,999, £1,101 less 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, £110 less than this car. Dealer: Fox's Motor Co in Oundle. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-55c338323dfd
Browse all BMW 4 Series cars for sale · 2018 BMW 4 Series price guide
More like this
- Used BMW 4 Series M Sport prices
- Used BMW 4 Series for sale under £30,000
- Used diesel BMW 4 Series for sale
- Used BMW 4 Series for sale near Watford
Photos
7 photos of this car are on its AskCar page.
As of 5 November 2026, AskCar lists 595,776 cars and vans from 12,945 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.