A Pyro Fuse is a very important safety device in your Tesla! The Pyro Fuse can disable the high voltage current of your vehicle if an over current event occurs… In other words it is a last resort circuit protection device. While it is an uncommon event for your pyro fuse to need to be used it is much more common for the pyro fuse to wear out. If your Tesla determines that it needs a pyro fuse it will give you a notification. Your Pyro Fuse should only be replaced by trained professionals with specialized Tesla high voltage equipment. Let the Pros’ at Tim’s help with any of your Pyro Fuse needs.