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
• Year: 2018
• Mileage: 20,670 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres
• Gearbox: Automatic (DCT)
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 203 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 20,670 miles, this 2018 BMW M4 Competition has covered about 32,400 fewer miles than other 2018 BMW M4 cars. Priced at £22,995, this car is advertised £12,145 below the AskCar estimate of £35,140. This is a large price difference, so check the price and vehicle details with the dealer. The AskCar estimate uses 738 UK dealer adverts for the BMW M4, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 65 days ago, the asking price has dropped by £2,000. Our records show an MOT expiry date of 2 September 2026, which has passed. Ask the dealer for an update. According to the government's MOT record, its advertised mileage is consistent with the latest test. You can find this car at The Drivers Gallery in Bromsgrove. 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

Far below the going rate: £12,145 (34%) under the AskCar estimate of £35,140. Worth asking the dealer why.

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

This 2018 BMW M4 has been on sale for at least 65 days.

Price history

AskCar first saw this advert on 29 August 2026 at £24,995. Its asking price is now £22,995, £2,000 less. The latest price cut was seen on 31 October 2026.

Price changes recorded:

• 29 August 2026: £24,995
• 2 October 2026: £24,695
• 31 October 2026: £22,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: the latest record we hold ran out on 2 September 2026; ask the dealer for the current MOT.

It has had 6 MOTs. The latest, on 3 September 2025, passed.

Advisories at the latest test: under tray fitted.

Mileage at that test: 16,245 miles, which matches the advertised 20,670 miles.

Advertised mileage is about 32,400 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 £30,990, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW M4 Competition, 3.0 petrol convertible, black. Mileage: 35,000 miles. Price: £30,990, £7,995 more than this car. Dealer: James Paul in Horsham. AskCar page: https://askcar.co.uk/car/bmw-m4-2018-c820930280b6
• 2018 BMW M4 Competition, 3.0 petrol convertible, white. Mileage: 56,483 miles. Price: £27,485, £4,490 more 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, £5,455 more than this car. Dealer: Motorexe in Redbridge. AskCar page: https://askcar.co.uk/car/bmw-m4-2018-aa5ff0d10d71

• The nearest: 2018 BMW M4 Competition, 3.0 petrol convertible, white, 67 miles from this car. Mileage: 72,000 miles. Price: £24,999, £2,004 more than this car. Dealer: Waterways Prestige in Leighton Buzzard. AskCar page: https://askcar.co.uk/car/bmw-m4-2018-11c92b55e920