The Charcoal Filter is installed in the top part of the Microwave doorway! This part does NOT come with installation instructions. Please know that Installation Instructions are in the user manual that accompanied yoru microwave. This Charcoal filter is for the following LG Microwaves: LMV1650ST, LMV1650SW, LMV2031BD, LMV2031SB If your Microwave is NOT listed above, please send us a message so we may help you obtain the correct part!