2018 BMW M4 3.0 BiTurbo Competition

Overview

• Make: BMW
• Model: M4
• Trim: Competition
• Version: 3.0 BiTurbo Competition DCT RWD Euro 6 (s/s) 2dr (444 bhp)
• Year: 2018
• Mileage: 35,000 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 444 bhp
• Gearbox: Automatic (DCT)
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 203 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW M4 Competition is advertised with 35,000 miles, approximately 18,100 below the typical mileage for its age. Priced at £30,990, it is advertised £1,598 below the AskCar estimate of £32,588. To work out the AskCar estimate, we analyse UK dealer adverts for 738 BMW M4 cars across different ages and specifications. The dealer may accept less. This car has been on sale for at least 118 days. Its advertised mileage matches the government's MOT record. You can find this car at James Paul in Horsham. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,598 (4%) under the AskCar estimate of £32,588.

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 738 priced BMW M4 adverts across different ages and specifications, as of 2 November 2026.

A 2018 BMW M4 with the 3.0 petrol engine is typically advertised at £29,000: the median of the 68 for sale on AskCar, as of 2 November 2026.

Time on sale

The dealer may accept less. This 2018 BMW M4 has been on sale for at least 118 days. About half of 2018 BMW M4 cars are gone from sale within a month of being advertised: 44 of the 85 first advertised between 14 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 7 July 2026 at £30,990. 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 2 November 2026: valid until 12 December 2026.

It failed its MOT on 3 December 2025 (offside front tyre has a bulge, caused by separation or partial failure of its structure; offside windscreen wiper does not clear the windscreen effectively; offside rear brake pad(s) incorrectly mounted) and passed 2 days later, on 5 December 2025.

There were no advisories at the latest test.

Mileage at that test: 34,575 miles, which matches the advertised 35,000 miles.

Advertised mileage is about 18,100 miles lower than the median mileage of a 2018 BMW M4 on AskCar.

Similar cars

7 other 2018 BMW M4 Competition 3.0 petrol automatic convertibles are for sale at UK dealers, from £22,500 to £28,450, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW M4 Competition, 3.0 petrol convertible, grey. Mileage: 20,670 miles. Price: £22,995, £7,995 less than this car. Dealer: The Drivers Gallery in Bromsgrove. AskCar page: https://askcar.co.uk/car/bmw-m4-2018-fdf28d82d6db
• 2018 BMW M4 Competition, 3.0 petrol convertible, white. Mileage: 56,483 miles. Price: £27,485, £3,505 less than this car. Dealer: IM Car Supermarket in Dunstable. AskCar page: https://askcar.co.uk/car/bmw-m4-2018-68911ea98092
• 2018 BMW M4 Competition, 3.0 petrol convertible, blue. Mileage: 58,000 miles. Price: £28,450, £2,540 less than this car. Dealer: Motorexe in Redbridge. AskCar page: https://askcar.co.uk/car/bmw-m4-2018-aa5ff0d10d71