Battery not charging.
Posted: Thu Oct 22, 2026 1:06 pm
Hi all, 2007 E83 3.0D LCI
Issue is that the alternator is not charging the battery.
New alternator fitted - no difference
Known good battery off my VW diesel put on to the BM, no difference
Tried disconnecting the battery monitoring sensor to see if that had any effect - no
No codes showing up and when I look at live data it shows the alternator running at 99% load and the battery voltage slowly drops as the car runs.
Starts perfectly off a charge battery, battery light is on the dashboard before starting and immediately goes out when the car starts up.
This is doing my head in so if anyone has any ideas, I'd appreciate your assistance.
Thanks.
Issue is that the alternator is not charging the battery.
New alternator fitted - no difference
Known good battery off my VW diesel put on to the BM, no difference
Tried disconnecting the battery monitoring sensor to see if that had any effect - no
No codes showing up and when I look at live data it shows the alternator running at 99% load and the battery voltage slowly drops as the car runs.
Starts perfectly off a charge battery, battery light is on the dashboard before starting and immediately goes out when the car starts up.
This is doing my head in so if anyone has any ideas, I'd appreciate your assistance.
Thanks.