Bimmerfest - BMW Forums - View Single Post - Charge Battery?? Really??
View Single Post
Old 12-28-2012, 02:09 PM
lbjgh's Avatar
lbjgh lbjgh is offline
Officially Welcomed to the 'Fest
Location: North of Toronto
Join Date: Dec 2011
Posts: 802
Mein Auto: 2013 X3 M-Sport
To improve fuel savings the alternator is designed to charge on deceleration and take advantage of the vehicle's kinetic energy.

I too have had that message displayed but after a five minute drive in sport mode with plenty of intended engine revving (gearing down) the battery was good to go. Actually one of my HID headlights failed during this incident but magically fixed itself upon restart (designed by Microsoft... haha, fixed by a simple re-boot).

I have thought about hooking up my multimeter to the battery to confirm the car only charges on deceleration... but hell, a $50-70K car should be smart enough to charge the battery if discharged regardless of accelerating or decelerating...

Last edited by lbjgh; 12-28-2012 at 02:10 PM.
Reply With Quote