2018 BMW M4 3.0 BiTurbo Competition

Version: 3.0 BiTurbo Competition DCT RWD Euro 6 (s/s) 2dr

Price: £22,995. Far below the going rate: £12,227 (34%) under the AskCar estimate of £35,222, our expected asking price for this car from its model, age, mileage and specification, drawing on 743 priced BMW M4 adverts on AskCar as of 31 October 2026. Worth asking the dealer why.

AskCar lists 764 used BMW M4 from 474 UK dealerships, as of 31 October 2026.

Overview

Make
BMW
Model
M4
Trim
Competition
Version
3.0 BiTurbo Competition DCT RWD Euro 6 (s/s) 2dr
Mileage
20,670 miles
Year
2018
Fuel type
Petrol
Body type
Convertible
Engine
3.0 L
Gearbox
Automatic
Seats
4
CO2
203 g/km
Colour
Grey
Doors
2
Driven wheels
Rear Wheel Drive
Gearbox version
DCT
Engine badge
BiTurbo
Emissions standard
Euro 6

About this car

At 20,670 miles, this 2018 BMW M4 Competition has covered about 32,300 fewer miles than other 2018 BMW M4 cars. Priced at £22,995, this car is advertised £12,227 below the AskCar estimate of £35,222. This is a large price difference, so check the price and vehicle details with the dealer. The AskCar estimate uses 743 UK dealer adverts for the BMW M4, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 63 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. Our comparison with the latest MOT reading has not flagged a mileage discrepancy. You can find this car at The Drivers Gallery in Bromsgrove.

Stock data as of 31 October 2026.

How we estimate prices and check cars

Price history

AskCar first saw this advert on 29 August 2026, 63 days ago. Price reduced by £2,000 from £24,995 since AskCar first saw it. 2 price reductions recorded, the latest seen on 31 October 2026.

Recorded asking prices
Date observedAsking price
29 August 2026£24,995
2 October 2026£24,695
31 October 2026£22,995

Price and mileage comparison

Far below the going rate: £12,227 (34%) under the AskCar estimate of £35,222. 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 743 priced BMW M4 adverts across different ages and specifications, as of 31 October 2026.

Advertised mileage is about 32,300 miles lower than the median mileage of a 2018 BMW M4 on AskCar.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT: the latest record we hold ran out on 2 September 2026; ask the dealer for the current MOT. 16,245 miles at the last test.

Other matching cars

44 other 2018 BMW M4 Competition automatic petrol cars are for sale at UK dealers from £20,950 to £44,995, as of 31 October 2026.

The 5 cheapest:

The 44 matching cars have covered 10,792 to 89,000 miles, compared with 20,670 miles for this car.

Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. The AskCar estimate adjusts for these differences.

Browse all BMW M4 cars for sale · 2018 BMW M4 price guide

More like this

Photos

49 photos of this car are on its AskCar page.

How to contact the dealer and its opening hours are on this AskCar page.

As of 31 October 2026, AskCar lists 583,548 cars and vans from 12,716 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.