The problem
Control modules are integrated—not interchangeable.
A replacement body, ignition, start, or seat module may contain security, coding, and configuration information from another vehicle. An unmatched donor can create no-start conditions, lost functions, communication faults, or incorrect equipment behavior.
- Replacement BCM introduces multiple vehicle faults
- ISM or start module does not authorize operation
- DSM or seat functions are lost after replacement
- Original module is damaged but still partly readable


