Yes, it is indeed the "Mass Air Flow Meter" that connects to the wiring harness. Toyota uses this instead of a "Manifold Absolute Pressure (MAP)" gauge. Inside the top half of the air cleaner cover is a maintenance-free carbon filter (not shown in the pictures).

Stan

P.S. nash, if you give the aircleaner a good horizontal "whack," do you get a rattle from something inside yours? Please let me know! Thanks.