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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 10-08-2016, 04:07 PM   #1
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Join Date: Nov 2015
Location: Providence
Posts: 29
My Ride: 2005 325xi Wagon
Charging System Light advice

My red charging system light went on yesterday and has stayed on - I've had it go on for short periods before but never for this long. I checked and retightened the connections at the alternator, and at the battery. The OBD "test" screen shows 12.2v with the key on but before starting the car, and between 13.6 - 14.0 once the car is on. With the lights, ac, defroster, etc. on, those numbers drop a bit initially but then return to what look like normal levels to me.

Should I be seeing a number higher than 12.2 for the battery before start? Time to dig through receipts to see when the battery was last replaced.


Last edited by tomsawyer85; 10-08-2016 at 04:13 PM.
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Old 10-08-2016, 05:11 PM   #2
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Location: TEXAS - Circuit of the Americas doing laps with my M5 and coming in for a pit stop.
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Get your battery fully charged and tested.
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Old 10-08-2016, 06:48 PM   #3
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My Ride: 2005 325xi Wagon
Thanks - I realized almost as soon as I made the post that getting the battery checked was the best next step.
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