This issue can also be indicative of a battery on its way out. Check your voltage

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2001 530i tiAg sport (sold)
2002 540iA sport (sold)
2006 330i sport (sold)
2008 535i-6 sport (sold)
1999 528iT sport (sold)
2002 525iT alpine sport
1990 325i sedan
1990 325is coupe