Thanks for all the helpful responses!

It is a 2001 3.0i, 215K miles. Sorry, I forgot to mention that! lol

Yeah, the new MAF is a cheap one. I guess I got what I paid for...

I am gonna go looking into the ICV and see if I spot anything there. If nothing, then I am gonna order the VDO/Siemens MAF from bavauto.

I cannot recall if/when the O2 sensors were replaced. I don't mind replacing the front ones, but I am not looking forward to replacing the rear ones.