Although BMW engines are largely aluminum alloy construction you still have steel parts within that wear i.e piston rings and steel wall linings, bearings, etc. The point is ECS is as guilty as the manufacturers of cheap Chinese parts, because they knowingly buy cheap stuff that ultimately fail. An aluminum drain plug is not BMW OEM quality IMO.

__________________
/ / / Mike
BMW X5 Xdrive50i 2015 F15
BMW 325iC 1992 E30
BMW X5 4.4i - sold
BMW 335i X Drive 2010 - sold
BMW Z4 3.0is 2006 - sold
BMW 325is 1993 - sold
BMW 2002 1976 - sold

X5 Garage