Where is the fuse box located in a 2005 seat leon ? - Fixya Sep 07, 2011One fuse box is under the hood by the left front fender, and the second fuse box is located under the left rear passenger seat. Seat Leon Mk3 - Interior Fuse Box Location? - Page 1 Mar 19, 2010This will sound like a really stupid question (always a good start that!), but I need to replace a fuse in my Mk3 Seat Leon, and I can't find the internal fuse box!