[Confirmed] Got replacement ECU for Smart Forfour, now code doesn’t match

1832 views - Last reply: March 21, 2025
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Need the factory key code to program a key for my Smart Forfour

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

Replies (4)

Thanks! Been struggling with this on my Smart Forfour for a while.

This looks helpful for those of us with a locked-out Smart Forfour.

Any updates on getting the key code for the Smart Forfour?

Still looking for a reliable way to find the key code on my Smart Forfour.

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Professional key programming requires: diagnostic tools to access the immobilizer system, key code software, transponder programmers, and often proprietary manufacturer equipment. Some locksmiths and all dealers have these tools.
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