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Old Thu, Dec-07-2017, 02:26:23 AM   #12
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Default Bought new Used 97 M3 - Keys arent matching

Originally Posted by NolliM3 View Post
The EWS delete is just breaking the link between the EWS and the even if one gets new cylinder/key, they would need to align with EWS.
My thought here is that Dealer key(s) would be sourced to the VIN, containing a chip code pre-coded within the EWS, a total of 10 codes. The tumbler assembly would also be VIN matched to the keys. Tumbler does not play a roles in key, EWS, ECU ‘conversation’, but the antenna ring located on the tumbler does.

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Last edited by bluptgm3; Thu, Dec-07-2017 at 02:34:08 AM.
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