[Dmitry at Pelican Parts]

Hi Bob - congrats on the new purchase. I'm attaching a link to our site's DIY tech articles on the E46 platform for reference and also a tech article on the MAF; if needing replacing.

BMW E46 3-Series Technical Articles (1999-2005) - Pelican Parts

BMW E46 Mass Air Flow Replacement | BMW 325i (2001-2005), BMW 325Xi (2001-2005), BMW 325Ci (2001-2006), BMW 325ti (2001-2004) | Pelican Technical Article