Normal Battery Voltage

[X5 Meister]

For the E53 X5 during Quality Certification I the display vehicle check that is carried out by the technician calls to maintain battery voltage at 12.65V minimum. Interestingly for the E70 X5 beginning 2007 this specification changed to 12.3V minimum.

[RickM5X3]

My 2004 4.4i routinely is reading 13.5-14v (monitoring through the unlocked test functions on the OBC). But I've had several occurences (in a several month period) where it only reads 10v or so. If I stop and restart, it goes back to normal charging. Alternator on its way out perhaps?

[RickM5X3]

Originally Posted by RickM5X3

My 2004 4.4i routinely is reading 13.5-14v (monitoring through the unlocked test functions on the OBC). But I've had several occurences (in a several month period) where it only reads 10v or so. If I stop and restart, it goes back to normal charging. Alternator on its way out perhaps?

Any have any thoughts on this voltage problem? Thanks!