Used BMW M4 Ignition Switch

All generations of the BMW M4 use a push-button engine start system rather than a traditional keyed ignition switch, so a conventional ignition switch barrel is not a part that was ever fitted to this vehicle. What you may actually be looking for is the start/stop button itself, the EWS (electronic immobiliser module), the steering column stalk/switch assembly, or the key fob and associated electronics. Confirm exactly which part has failed with your breaker, quoting your registration, so they can source the correct component.

This is very likely what you need - the BMW M4 has a steering column switch cluster (also called the combination switch or stalk assembly) that controls functions such as indicators, wipers and lights, and this is a common point of failure that customers sometimes describe as an 'ignition switch' problem. There is no keyed ignition barrel on any M4 variant, so a used part described as an 'ignition switch' will not fit or fix the issue. Describe your exact symptoms to the breaker and quote your registration so they can identify the correct part.

Neither the F82 M4 (2014-2020) nor the G82 M4 (2021-onwards) uses a conventional ignition switch - both generations rely entirely on push-button start and electronic key recognition. The two generations use completely different steering column assemblies, EWS/CAS modules, and start button components, so parts are not interchangeable across that boundary. Give your breaker your exact registration so they can confirm the right electronic module or switch for your specific generation.

Trim level does not affect whether a keyed ignition switch is fitted, because no M4 in any trim - standard, Competition, Competition xDrive, or CS - was ever built with one. If you are chasing a start-system fault, the underlying electronic components such as the CAS module or start button may differ between variants, so always confirm against your registration rather than assuming trim-to-trim compatibility. A breaker will be able to check the exact part numbers for your car once you provide your plate.

A standard 4 Series (F32/F33/F36 or G22/G23) also does not use a traditional keyed ignition switch, so there is nothing of that description to transfer across. If you are looking for a steering column stalk, start button, or immobiliser module, these parts can differ between the standard 4 Series and the M4 even within the same body generation, so cross-model fitment is not straightforward. Confirm the exact part and part number with your breaker against both registrations before purchasing.

Rather than searching for an 'ignition switch', try searching for the CAS module (Car Access System), EWS module, push-button start switch, or steering column switch cluster, depending on your diagnosed fault. For key or immobiliser faults the CAS module is often the culprit, and programming is usually required when fitting a used unit, so factor that into your cost. Provide your registration to the breaker so they can match the correct module and advise on coding requirements.