Thx - will check if I can get a Valeo but still trying to see if there could be a hidden issue somewhere else.

When thinking about the driving conditions when the new alternators failed, the only common factor was high RPM...e.g., got the errors/failure after revving up.....

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E70 - 3.0si & F10 - 535ix
Previous Cars:
E34 - 525i, E39 - 530i, E60 - 530i