BMW MS43 ECU OPTIONS
Choose the configuration for your project
Our MS43 services cover supported BMW applications using M54B22, M54B25 and M54B30 engines. Confirm the ECU label and part number before ordering; vehicle model alone is not enough to identify the correct unit.
Available options
- EWS immobiliser removal for supported plug & play applications. Without this option, diagnostic coding may be required.
- Rev-limiter adjustment, subject to your engine, condition and intended use. Discuss the appropriate setting with us; a higher limit is not a guarantee that an engine is safe at that speed.
- ABS / vehicle-speed-signal configuration for supported applications. This concerns the ECU’s response to a missing speed signal; it does not repair an ABS fault.
- Earlier thermostat opening configuration.
- Post-catalyst oxygen-sensor configuration for supported applications.
- Secondary air pump configuration.
- Idle control valve configuration for M54B30 applications only.
Tuning for your modifications
We can discuss configurations for a M54B30 inlet manifold and supported exhaust changes, including sports catalysts and free-flow exhaust systems. Tell us the exact specification and intended use so the configuration can be matched to the application.
What this service does not cover
These products do not support forced induction. We do not offer pops and bangs, launch control or flame effects through this service.
Before ordering
Send a clear ECU-label photograph, engine details and a list of modifications. Please check the individual product listing and contact us about any option you are unsure of.
Let’s find the right solution
Email your vehicle details, ECU part number and a photo of the label. Tell us about the fault or the work you have in mind.