There's only one style I found for LG refrigerator air filters. They say to change it every six months, but we waited longer. When the refrigerator air smelled funky, it was time to change it! The guy at Best Buy looked it up and verified it would work with my LMXS30776S/00. Since Best Buy has a great return policy, you can always take it back. Note that the filter cover was a bear to remove, but yours might be easier.