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thstone · 08-17-2016, 08:40 PM

Sorry, I can't help with O'Reilly parts numbers.

But I can say that the Tiptronic has an alternator PN that is different than those for manual transmission cars. Go to this link and you'll find the alternator is #23 and is shown as PN 99660301203 for Tiptronic cars 1997-2004:
Battery Power Distributor Starter Generator

This doesn't mean that the O'Reilly/AutoZone units are not universal (will work for both transmissions), it just means that Porsche stocks them separately. I do now know what the difference might be (if any). You can always call ******************************************** and ask them.

08-17-2016, 08:40 PM	#3
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	Sorry, I can't help with O'Reilly parts numbers. But I can say that the Tiptronic has an alternator PN that is different than those for manual transmission cars. Go to this link and you'll find the alternator is #23 and is shown as PN 99660301203 for Tiptronic cars 1997-2004: Battery Power Distributor Starter Generator This doesn't mean that the O'Reilly/AutoZone units are not universal (will work for both transmissions), it just means that Porsche stocks them separately. I do now know what the difference might be (if any). You can always call ******************************************** and ask them. __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor Last edited by thstone; 08-17-2016 at 08:51 PM.