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.
Login Procedure (function 11): Notes
In order to perform the Login procedure, a coded "secret number" must first be determined in conjunction with the 14 digit identification number of the Engine Control Module (ECM) or anti-theft immobilizer.
ECM and immobilizer identification numbers are read upon initiation of On Board Diagnostic (OBD).
Effective calendar date 03.11.2002, the immobilizer secret number is encoded for increased security. The encoded number is now 7-digits and is referred to as a "PIN" ("Personal Identification Number").
All models with anti-theft immobilizer are affected, regardless of generation.
The process to obtain the 7-digit PIN remains the same as with the 4-digit "secret number" previously used - that is: request via the "Warranty Information Network" (WIN). However, WIN Administration now requires additional information from both the vehicle and Dealer in order to generate the 7-digit PIN.
The PIN is only valid on the day it is requested. Thereafter, a new PIN is required.
The 7-digit PIN can only be processed and input using either the VAS 5051 or VAS 5052 with basis CD version 3.10 and higher. VAG 1551/1552 Scan Tools are unable to process or input this number.
A correct Importer/Dealer number must reside in the VAS 5051/5052 in order to request a PIN.
The requested PIN is intended for internal use only, is worthless to other Dealers and must not be shared with the customer.
- All Dealership VAS 5051 and VAS 5052 testers in service MUST be programmed with the correct Importer/Dealer number, as well as correct date and time.
- Adaptation functions of the anti-theft immobilizer are not possible with incorrect data!
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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.