Never replaced mine, but got an alternator priced at 900 some when i was diagnosing charging issues on mine. My Indy charges 90/hr, I'd guess a minimum of 4 hours.

__________________
Current-

--2003 X5 4.6
Estoril Blue
Black Nappa leather
rear air bags
OEM nav
OEM hitch
OEM cargo liner
Black housing SPYDER headlights - Evo-XR projectors

2017 GMC Sierra, 7K miles...
2017 GMC Sierra, 60K miles...
2015 GMC Sierra 280K miles...
2011 GMC Sierra, 500K miles...

Previous wheels:

--First love~
1969 Chevy C10, 396BB bored, 3 on the tree, Black ~SOLD~

--2011 Chevy Silverado LT 2500HD CCSB, Black, 250K miles ~SOLD~