2006 Xc90 2.5t alternator charging output question

DeeSi · Post by **DeeSi** » 16 Aug 2026, 07:46

Good morning,
I recently checked my charging output of the alternator before installing a new battery. Battery was around 10 years old and it was time. My charge rate was between 13.72v and 13.94v with the DRL on. Is this acceptable or should it be in the 14v to 14.5v volt range? Any reply appreciated, thanks in advance.

Post by **ggleavitt** » 16 Aug 2026, 10:15

Can have a look at the attached, monitor outside temperature see where you land voltage-wise after running a load.

ACM TS VIDA 25T.pdf: (762.7 KiB) Downloaded 40 times

ACM is inside voltage regulator, it's easy enough to change separately but after 20+ years it's smarter to change the whole thing out IMO. I did one around 10 years ago albeit proactively, link here with some photos if they have not been deleted. Having done a few alternators, I firmly believe that the Bosch OE remans are the best quality and life for this part- https://www.swedespeed.com/threads/xc90 ... nt.353570/

DeeSi · Post by **DeeSi** » 17 Aug 2026, 08:03

Hi ggleavitt,
Thank you for that info! Great stuff.