nash — Thanks! I'll have to investigate further to find the cause of my rattle. It might be the Mass Air Flow Meter, as there doesn't seem to be anything to rattle in the bottom half of the case. [I had already opened my air cleaner up in the hope that there was some obvious source for the rattle, but couldn't see one. I'll need to get the top half off the car in order to test whether the rattle is indeed in the top half.]

Stan