I removed the oven door http://fixitnow.com/wp/2009/11/30/removing-and-re-installing-the-oven-door-on-a-thermador-prg304us-range/ (this was the hardest part of the job because one hinge latch was jammed in position - I used a large screwdriver and a lot of force to free it ), lower front panel, oven racks and bottom pan of oven. The actual igniter replacement was a snap. Two screws hold the igniter in place and the wires have quick disconnects (I used two pairs of pliers to grab the connectors to disconnect them, without pulling on the wires) to attach them to the controller. Easy!