FBS4 Engine Control Module Transfer Immo Data

Upgrading or swapping an engine on modern Mercedes-Benz vehicles equipped with the FBS4 security system requires precise immobilizer synchronization. Our Mercedes-Benz FBS4 Engine Retrofit & Immobilizer Data Transfer Service is a professional remote solution designed to ensure seamless engine replacement without starting issues or security conflicts.

This service allows you to retrofit a different engine variant—such as upgrading from a 2.0L engine to a 3.5L—by securely transferring immobilizer (IMMO) data from the original ECU to the replacement ECU. Using full data reads from both engine control units (via FLEX or other compatible programmers), we modify and synchronize the data so the new engine ECU is fully matched to the vehicle.

Once the modified data is written back, the engine starts normally with no warning messages, no immobilizer lock, and full factory functionality retained. This service is ideal for professional workshops and retrofit specialists working on W205, W222, W213, W166, W247, and other Mercedes-Benz models equipped with the FBS4 system.

✔ Remote service – no physical ECU shipping required
✔ Works with engine upgrades and replacements
✔ Maintains original vehicle security and coding
✔ Professional solution for complex Mercedes retrofits

For detailed requirements and compatibility confirmation, please contact us via chat.