That is strange, Autohaus lists the 540i only from 1994, nothing in 1993. But 10/1993 production means 1994 model.
http://www.autohausaz.com/search/pro...0@Oil%20Filter

Oil Filter - Metal ends - With seal rings * Warning! Must check oil filter to see if it has metal ends or plastic ends
Part # : 11 42 1 731 634 $ 9.96
http://www.bavauto.com//assets/produ...1421731634.jpg

Oil Filter - Plastic ends - With Seal Rings * Warning! Must check oil filter to see if it has metal ends or plastic ends
Part # : 11 42 1 745 390 $ 9.95
http://www.bavauto.com//assets/produ...1421745390.jpg