I have a 530I 2003 and couple of days ago when I was parking the car I noticed the Oilpressur warning, so I stopped the engine, checked the Oil level and it was ok, started the engine again and everything was normal and has been ever since. Do you guys have any clue what?s the problem? Is it the oilpressur sensor or is it the Oilpump that is loosing pressur at low idle. the idle is about 600rpm. Is there any chance to monitor the oilpressur?