Hey guys, sorry for reviving the old thread - I've got a red battery light and trying to see if I can get away with minimal blood as possible...

the part number that the Blues Sky mentioned for the alternator is the one that would fit in '02 E53 4.6iS, and it is confirmed by the RealOEM... the regulator part is not coming on the RealOEM as part of the 150Amp alternator... Is it so important I should not worry about it?...

Any ideas?

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E53 X5 4.6iS
147K mi - Sold May 2013
Tireprints left in:
USA, Nicaragua, Costa Rica, Panama, Russia

E53 X5 4.8iS built 2005-10-17
66200 mi - June 2012
96000 mi - June 2013
112000 mi - June 2014
OEM fire extinguisher
OE first aid kit
OE tow hitch
OE TV module
OE aspheric mirror
K&N air filter
black/white badges
rear camera
4-channel video recorder

Here is the list of things I have done to the X