Originally posted by steph57
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1. Get a used DME
2. Get the ISN from the used DME
3. Flash new/latest ZUSB with your own VIN to DME, Code it and delete adaptions.
4. Get tool to read CAS (R270 for instance) load dumps from CAS and set ISN from used DME in CAS (I hope you have your old ISN from original ECU so you can compare it)
5. Reset rolling codes in DME & CAS
6. You should be able to go!
ALWAYS first get a full read of all ECU memories before you start RSA bypass or flash (Full read, partial read, RAM read and ISN/KEY). In case it goes wrong you always have back up with important information.
Strange thing is that yours failed, was battery voltage >13.5V? Bimmergeeks cable?
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