Fits chassis 116 123 126 and 201 Diesels with PENCIL glow plugs, from 1978 to 1989. This little strip fuse is located in the Glow Plug Relay and can sometimes be the cause of your glow plug problems. Even if it appears to be good, we recommend that you physically remove it and inspect it for cracks or breaks before you replace the Relay! Sold in a 2 pack.