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Main page    Immobilizers    RENAULT

Renault immo code calculator:

Renault immobiliser system is based on unique security code stored in each immobiliser related part: engine control unit, immobilizer control unit and the key. If you have any problem with Renault immobilizer - lost key, desynchronized keyfob - you will need immobiliser security code to repair all car electronic system and start the vehicle. Usually this code you can order from Renault dealer, but this could take too many time. You can solve this problem by yourself with Renault Immobilizer Security Code Calculator. This calculator deal with most immobilizer systems produced in range of year 1994-2002. It perform security code calculation from the label inside the ignition key and from immobilizer EEPROM dump as well.

  • Security code calculation by label inside the key (all known types)

  • Security code calculation from immobilizer control unit EEPROM dump (more than 10 types supported). Includes also calculation from MEGANE/SCENIC interconnection unit UCBIC microcontroller and ESPACE interconnection unit BII microcontroller dumps.

  • Renault MEGANE/SCENIC from year 1999 with UCH immobiliser - 8 digit key programming code calculation from microcontroller file.

  • Renault Laguna II 12 character card programming code calculation from dump.

Upgrade by Internet.

In future more Renault systems will be added.

 Download latest program  -  January 25 2005



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Universal decoding tool for Renault fuel injection ECU:   

Probably you did had problems when tried to replace damaged Renault injection control unit. 

From the year 1994 most Renault cars are equipped with engine immobilizer system and it makes replacement of injection computer more complicated. There is no problem if replacement ECU is bought from Renault service dealer - it is sold with no immobilizer code stored, but replacing damaged computer with used one is impossible because of mismatch of unlocking codes.


Decoding tool has several modes of operation and deals with all known petrol and diesel injection systems, introduced in range of year 1994-2001 without intervention in to the ECU (diesel coded anti-start valve as well). After decoding process is completed, control unit became not coded - as it was bought from dealer. ECU must be taken out from the car and connected to the decoding tool according to user manual. You can see user manual samples: Intro and Safir2 wiring

 Systems this tool was tested with:









 SAGEM SAFIR (55pin)

 Coded fuel cut-off valve (1.9D DDS)

 SAGEM SAFIR2 (35pin)







 Decoding of engine control units manufactured in range of year 1994-1996 is semi-automatic,

from year 1996 - fully automated. Especially this tool can be useful when rubber-filled FENIX5, SAFIR2 or 

coded diesel anti-start valve must be decoded. 

 Buying this tool you will be supplied with all required information: user manual and connection diagrams.

Decoding tool is stand-alone, no PC is required.


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