Jon E Arnold , MO December 29, 2014 Appliance: Bosch HBL665 Convection heater element went bad Removed 4 screws from back panel and removed back panel. Removed 3 screws and 3 wires from heater element and removed element. Reversed procedure with new element and seal. You will need the seal! Old one crumbled apart. All took less than 10 minutes. Read More... 18 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes Tools: Screwdrivers