[Update] Replacing immobilizer module on Audi S4 B7 - need to reprogram?

638 views - Last reply: January 11, 2025
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Where's the key code stored on a Audi S4 B7 for programming keys?

Hello! We've developed a VIN-based tool to help you get your key code for the Audi S4 B7. Check it out here: VIN Key Code Generator.

Replies (5)

My Audi S4 B7 won’t budge without the code. Hoping this helps.

Dealer wants too much just to reset my Audi S4 B7. Trying this instead.

Just checking in to say this helped with my Audi S4 B7. Thanks!

Any updates on getting the key code for the Audi S4 B7?

Been searching everywhere for help with my Audi S4 B7's key code.

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Lost Keys
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Key Fob Issues
1) Find the seam and pry open the fob (some have tiny screws) 2) Note battery orientation 3) Remove old battery (CR2032 is most common) 4) Insert new battery 5) Reassemble. Test all buttons - if issues remain, the fob may need reprogramming.
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Programming syncs the key's transponder chip with your car's immobilizer system. The process varies by manufacturer but generally involves: 1) authenticating with the car's computer 2) erasing old keys if needed 3) programming new key codes 4) testing functionality.
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