Quote:
Originally Posted by X5Guy70
Has anyone experienced this or may know what is causing this?
The other day my '02 X5 4.4 was dead so I jumped the battery, drove it for 20+ minutes, and parked it. Later that night my factory alarm went off, I went out to turn the alarm off, and everything seemed dead....door locks, etc. Then, the alarm starting going off (battery must be OK) & I could not turn it off.
My battery is about 3 yr.s old now and I replaced the alternator about 3 yrs ago also.
This sounds electrical, any ideas?
Thank You
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Almost exactly what happened to mine (2004 4.8is). Although I got 5 days between mine refusing to start again. Since then, had it at my mechanics for 3 days but he couldn't find anything. Was going to take it to BMW service for some diagnostics but hasn't happened again (past three weeks). My bro is a sparky and we cleaned every main connection we could find to ensure good contact was being made. This was about 1 week after last failure to start so can't say it fixed the problem but may have helped.
Good luck with the diagnosis