Manufacturer: PSA (Citroën/Peugeot), Ford, Mazda
Brand: Siemens
Model: SID 804
Function: Immo off, immo virgin
Emulator: No
Siemens SID804 Immo off solution for PSA, Ford and Madza models
The Siemens SID804 ECU is used in selected diesel vehicles from Peugeot, Citroën, Ford and Mazda, including 1.4 HDi, 1.4 TDCi and 1.4 CD engine applications.
Immobilizer-related faults can complicate ECU replacement and vehicle diagnostics. CK Decode provides a Siemens SID804 immo off solution designed to process supported ECU EEPROM files and modify the immobilizer function.
Unlike an immo virgin procedure, which prepares an ECU for subsequent pairing or programming, an immo off modification disables the immobilizer authorization requirement. These are two different operations and should not be confused.
This immo off solution is ideal for scenarios where key loss, immobilizer faults, or ECU cloning makes bypassing the immobilizer essential. Unlike immo virgin procedures—which reset the ECU for reprogramming—our immo off disables the immobilizer logic entirely, allowing the engine to start independently of the original key signal.
Siemens SID804 Compatible Vehicles
The Siemens SID804 application list includes the following diesel vehicles:
- Citroën C2 1.4 HDi
- Citroën C3 (I) 1.4 HDi
- Peugeot 206 1.4 HDi
- Peugeot 307 1.4 HDi
- Peugeot 1007 1.4 HDi
- Ford Fiesta (Mk5) 1.4 TDCi
- Ford Fusion 1.4 TDCi
- Ford Ikon/Bantam 1.4 TDCi
- Mazda2 1.4 CD
Compatibility note: This list reflects the supplied vehicle applications. Not every model has an independently verified SID804 match in the available ECU database. Always confirm the ECU identification, hardware version and software compatibility before proceeding.
How to immo off SID 804 with CK Decode: step by step
The process of disabling the immobilizer in a Siemens SID804, with CK Decode is both direct and manageable, the essential steps include:
- Download CKDecode through this link
- Click on the Functions Tab and select Manufacturer – SIEMENS – SID 804 – Immo off
- Read EEPROM with your interface and upload the file
- Click Process button
- Write the file processed by CKDecode
