One problem related to oil pump has been reported for the 1999 BMW M3. The most recently reported issues are listed below.
: the contact stated while driving, the oil light came on and the engine made a grinding noise. The contact pulled over and checked the oil. The oil was full. The vehicle was taken to the dealership who determined an oil pan nut fell off into the oil pan causing an oil pump failure which burn the engine. The vehicle was taken to the dealership three days prior to this incident for regular maintenance, including an oil change. Updated 02/21/06.