My battery died last week when it was really cold. I charged it up and 5 days later it died again. How do I tell if it is the alternator or ecu?
BMW Q&AAsk Your Question
2001 BMW 325i Question: Battery troubles
Answer #1pushrod January 30, 2014, 09:02Master
Got to have it tested! Take it to a repair shop for this.
Answer #2Greg's Orange Auto (14209 Answers) , Orange, CA - (714) 361-9386globalhelper January 30, 2014, 13:01Master
have battery tested 1st,if alt bad i believe it wuld have died sooner
Replypastor rod, January 31, 2014, 20:41Rookie
Well, I went to local parts store and I didn't know they could test alt with the alt still in. Alt is good battery is bad. Also didn't mention the heat went out after I jumped the battery. That's why I thought it was the alt.