The Grease Filter is an OEM part for Frigidaire microwaves. This part traps grease and other particles generated during cooking, preventing them from accumulating on the internal components and the exhaust system. Common causes of a bad grease filter include prolonged use without cleaning or replacement, accumulation of grease and food particles, and damage from high temperatures or physical impacts. Symptoms of a bad Grease Filter include: Reduced ventilation efficiency Excessive smoke or odors during cooking Visible grease buildup on or around the filter The filter appearing clogged or damaged This OEM Frigidaire part is also compatible with Electrolux, Gibson, Kelvinator and some Kenmore models.5304517871 (AP6809087) replaces 5304464105.