Even though the case may be Bosch or even Valeo, if it is a rebuilt from an auto parts store it is NOT a Bosch or Valeo. They use generic rebuild parts and they do not play well with BMW systems.

Do yourself a favor, get a NEW Bosch or Valeo. Preferably Valeo as they were the OE builder for the E70.

I went through this very issue on one of my E70's with "rebuilt" Valeo alternators from Autozone. Replaced multiple times. Finally bought a new Valeo and all those problems went away. And lucky me, I had to argue with Autozone for a refund and finally got it.

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'01 740i Sport MKIV, Quad Brake Lights, Bi-Xenon retrofit, HID Fogs Dinan 7 Struts, Springs, camber plates, Intake, MAF, CAI, Throttle Body, NBT Retrofit, Strong Strut


'99 318ti Titanium Silver; '97 318ti Boston Green; '13 X5 3.5i Saphire Black Metallic
'84 633csi Black (sold); '88 325iC Black (sold); '97 740iL Black(sold); '01 740iS Black (sold);'97 318ti White (sold); '08 X5 4.8i Titanium Silver (sold); '96 318ti Alaska Blue (sold)