Really easy for a 75-year old female; just spent more time reading the online manual than actually installing the light bulbs to find out where to access the light bulbs.
After 26 years, the element burned out. I followed the diagrams on this website. Basically, I took out the screws that hold the element in place and carefully pulled the old element forward. The wires had fittings that slipped off the old element (with a little help from the wrench.) When the wires were disconnected, I clipped the adjustable wrench on the one of them to make sure they didn't slip back through the holes in the back of the oven. The old fittings slipped right onto the new element (couple of taps with a small hammer to get them all the way on). Them I slipped the wires back through the holes and put the two small screws in the plate at the back of the element. Quite simple, even for a guy with four thumbs.
We needed a phillips head screw driver to remove the single screw holding the light bulb cover in place. Removing the old bulbs was a little work, because they had come loose from the sockets. We unplugged the microwave, so we could grip the sockets with a tool. I think my husband used a needle nose plier for this. The new bulbs screwed in easily, and then we refastened the light bulb cover with the phillips head screw driver.
Turned off breaker, verified that the breaker controlled the oven and was actually off. This is important since you can still get a shock from leaks in the neutral side that may surprize you if you ground one side. Also some breakers can be mislabeled on older homes. I removed the two screws holding the element to the back of the oven phillips #1 screw driver. I carefully guided the wires and attached terminals out of the recess until I had about 5 Inches of wire inside the oven exposed. Just be patient and careful, they will come out. I then unpluged the wires from the old element and attached a binder clip to the ends so they could not slip back into the oven shell. Clothes pins are also a good choice or some duct tape. I thoroughly cleaned the oven. I then installed the wire terminals to the new element and reversed the removal procedure. I then verified function and temperature of the oven settings. It took me 10 minutes not including oven cleaning time.
Well, when you put the back cover on and screw it down make sure you have nothing touching the white wire leading to the oven light. I did and it blew the push switch when I threw the 220 breaker. Actually, the light was on when I came in the room, but when I pushed the switch on the front panel it sparked in the rear and popped the breaker. Then I saw the short and when I tested the switch it would not click. The install was fine.