Need to replace alternator 170A (http://bmwfans.info/parts/catalog/E5...em/alternator/). Several times car went off at highway speeds. Getting this error in DIS and it keeps coming back.

"DME- 2E95 Generator - Communications loss - Fault currently present - Fault would not cause a warning Light".

Any DIY for 4.4 2005 alternator removal?

Thanks for any pointers.

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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M.