Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Lost Key Procedure
If the 7-digit PIN is not known or is no longer applicable (outdated request), it must be requested from the "Warranty Information Network" (WIN) code retrieval system. WIN Administration requires the Vehicle Identification Number (VIN), the Immobilizer ID number and Dealer (number) information in order to generate the 7-digit PIN.
- Obtain replacement ignition key.
- Adapt all ignition keys. See IGNITION KEYS, ADAPTATION (FUNCTION 10) .
- Determine method by which data is exchanged between the Engine Control Module (ECM) and Immobilizer control module. Adapt ECM using appropriate procedure depending on data exchange protocol. See Data Exchange Via CAN Bus, Code Control Module or Data Exchange Via "W" Circuit, Code Control Module .
- Use Read Measuring Value Block (function 08) and observe data in display group 001, display field 1. See READ MEASURING VALUE BLOCK (FUNCTION 08) .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.