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Audi A4 B6: How to Read Immo Code from ECU or Key for New Meter Adoption - Tips & Tricks

xdredi 17199 17
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How can I get the immobilizer PIN/code needed to adapt a replacement instrument cluster in an Audi A4 B6 when I do not have the old cluster?

Get the immobilizer PIN from the engine ECU; if you use an original Carprog, some VAG ECUs can be read over OBD, but otherwise the ECU has to be removed and the EEPROM desoldered [#17127171][#17129473][#17129542] If you already have an active key/transponder from the car, that can also be used to log in and then continue the adaptation process [#17138584]
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  • #1 17127086
    xdredi
    Level 8  
    Posts: 168
    Help: 1
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    Board Language: polish
    Hello, I have to adopt a new meter, unfortunately I don't have an old meter. Where can I get the immo code?

    best regards
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  • #2 17127171
    T5
    Admin of Cars group  
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    From the engine control unit.
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  • #3 17127174
    xdredi
    Level 8  
    Posts: 168
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    How can I read it?
  • #4 17127188
    Ireneo
    Level 42  
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    xdredi wrote:
    How can I read it?

    Eg programmer.
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  • #5 17127198
    xdredi
    Level 8  
    Posts: 168
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    I have a carprog, can I rip it with it?
  • #6 17127242
    Ireneo
    Level 42  
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    You must desolder eeprom.
  • #7 17127256
    xdredi
    Level 8  
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    And without dismantling the ECU can it be done? I still have kwp 2000 plus and mpps v16.
  • #8 17129403
    xdredi
    Level 8  
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    can anyone help ?
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    #9 17129473
    Ireneo
    Level 42  
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    What you do not do, you have to undress.
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    #10 17129542
    biba24
    Level 18  
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    Ireneo wrote:
    What you do not do, you have to undress.


    Carprog reads ECU VAG after OBD. Of course, it must be ori
  • #11 17130296
    xdredi
    Level 8  
    Posts: 168
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    I downloaded the memory from the counter and ecu. Please provide immo number.
    Attachments:
    • ecu.bin (512 Bytes) You must be logged in to download this attachment.
    • liczniki.BIN (1 KB) You must be logged in to download this attachment.
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    #12 17130626
    biba24
    Level 18  
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    First of all, data is provided about which car it is and what drivers it is. e.g. EDC15. Here I see the driver Me7 pin you have 00610 counter in my opinion trash.
  • #13 17132261
    xdredi
    Level 8  
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    Connecting the carprog through obd, I read the PIN from the meter, I attach a photo. I enter it in VCDS as in the guide from youtube, but when entering a pin in Login-11 I get an error. https://www.youtube.com/watch?v=-p3HeFpKRN0

    Audi A4 B6: How to Read Immo Code from ECU or Key for New Meter Adoption - Tips & Tricks
  • #14 17132392
    piotrek1994
    Level 14  
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    Read immo data in carprog, security component read from clocks adopt in vcds, then precoding id48 and adding keys, cheers
  • #15 17133315
    xdredi
    Level 8  
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    piotrek1994 wrote:
    Read immo data in carprog, security component read from clocks adopt in vcds, then precoding id48 and adding keys, cheers


    Could you explain more precisely how to do it?
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    #16 17138584
    biba24
    Level 18  
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    the fastest to earn some extra transponder based on your meter. Having already active key will allow you to login. then you will add it to ecu.
  • #17 17140048
    xdredi
    Level 8  
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    biba24 wrote:
    the fastest to earn some extra transponder based on your meter. Having already active key will allow you to login. then you will add it to ecu.

    Thanks for helping me, you saved my car. :)
    What could you tell me how to change the mileage?
  • #18 17140417
    CameR

    Moderator of Vehicle Security  
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    xdredi wrote:
    What could you tell me how to change the mileage?

    Internal regulations of the "Cars service" section.
    The "Cars Serwis" department, as well as its subordinate departments, was created to provide mutual assistance in locating faults in our vehicles. Many of these faults can only be removed in specialized services, but the basic knowledge gained will allow you to avoid many unexpected failures in the future, and will also contribute to the initial location of the fault and will be an advantage during a conversation with a service technician.

    I. Content prohibited.

    In the public interest, it is prohibited to post content on the forum that is listed below.
    (...)
    c) correction of mileage in vehicle meters

    https://www.elektroda.pl/rtvforum/topic1210551.html

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Topic summary

✨ The discussion revolves around the process of obtaining the immobilizer (immo) code for an Audi A4 B6 when adopting a new meter without an old one. Users suggest reading the immo code from the engine control unit (ECU) using tools like Carprog, which can read ECU data via OBD. Some responses indicate that desoldering the EEPROM may be necessary, while others inquire about alternatives that do not require dismantling the ECU. The conversation also touches on the importance of having the correct drivers and the possibility of using a transponder to facilitate the login process. Additionally, there are mentions of issues encountered when entering the PIN in VCDS and discussions about changing mileage, which is noted as a prohibited topic on the forum.
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FAQ

TL;DR: PINs are typically 5 digits in tools (example: 00610). "Me7 pin you have 00610." This FAQ shows how to read your immo PIN, adapt a new cluster, and add keys on an Audi A4 B6 using CarProg, VCDS, or EEPROM methods. For A4 B6 owners and techs replacing a cluster without the old one. [Elektroda, biba24, post #17130626]

Why it matters: Using the right path (OBD vs EEPROM) prevents lockouts and speeds safe cluster swaps and key adaptation.

Quick Facts

Where can I get the immobilizer PIN if I don’t have the old cluster?

From the engine control unit. "From the engine control unit." Use OBD with a compatible tool or extract the EEPROM if needed. [Elektroda, T5, post #17127171]

Can CarProg read the PIN via OBD on Audi A4 B6?

Yes, CarProg can read VAG ECU PINs over OBD if the ECU is original. If the ECU is not original or is immobilizer‑off, OBD reading may fail. [Elektroda, biba24, post #17129542]

Do I have to desolder the ECU to get the PIN?

If OBD reading is not possible, desolder the EEPROM and read the dump. That is the reliable fallback. Use a programmer to read the chip on the bench. [Elektroda, Ireneo, post #17127242]

How do I adapt a replacement cluster with VCDS after getting the immo data?

Read the immobilizer data with CarProg, adopt in VCDS, then pre‑code ID48 and add keys.
  1. Read immo/component security data from the clocks using CarProg.
  2. In VCDS, adopt the cluster using that data (Login/Adaptation as per guide).
  3. Pre‑code ID48 transponders and add keys in VCDS. [Elektroda, piotrek1994, post #17132392]

VCDS Login‑11 rejects my PIN. What should I check?

Verify you are logging into the correct module for your immobilizer generation. Enter the SKC in the supported format. Convert older 4‑digit codes to 5‑digit with a leading zero where required. If locked out, wait the specified time, then try again. [Immobilizer III Instrument Cluster Swapping (Audi A4)]

Which ECU types are common in the A4 B6, and does that affect reading?

Common ECUs include EDC15 and ME7. In one ME7 case, the PIN was 00610 (5 digits). Reading method can differ by ECU and tool support. [Elektroda, biba24, post #17130626]

Can I read the PIN from the cluster (clocks) instead of the ECU?

Yes. Read the immobilizer/component security data from the clocks with CarProg. Adopt the cluster in VCDS and add keys. [Elektroda, piotrek1994, post #17132392]

Do KWP2000 Plus or MPPS v16 read the immo PIN?

To read the PIN, use a programmer/EEPROM method rather than generic OBD flash tools. That approach targets the immobilizer data directly. [Elektroda, Ireneo, post #17127188]

I don’t have a working key. How can I still log in and adapt?

Create an extra transponder coded from your cluster’s data. With an active key, you can log in, then add the ECU. [Elektroda, biba24, post #17138584]

Which transponder chip do I need, and do I pre‑code it?

Use an ID48 transponder. Pre‑code it with your immobilizer data, then add the keys in VCDS after cluster adoption. [Elektroda, piotrek1994, post #17132392]

Where do I enter the PIN in VCDS for an A4 B6?

Use VCDS. Select 17‑Instruments, then Login‑11 to enter the SKC. Continue with Adaptation as per the guide. [Immobilizer III Instrument Cluster Swapping (Audi A4)]

Can we discuss odometer correction during a swap?

No. The forum’s rules prohibit public discussion of mileage correction in vehicle meters. The moderator closed that topic. [Elektroda, CameR, post #17140417]

CarProg read a PIN from my meter, but VCDS still errors—now what?

Read full immobilizer data from the clocks in CarProg. Adopt the cluster in VCDS. Pre‑code ID48 and add keys. That is the recommended order for a successful swap. [Elektroda, piotrek1994, post #17132392]
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