Well, good thing I'm stubborn, with a lot of patience. My husband was ready to take it to a mechanic tomorrow, but after I received the reply from bladecutter saying to take our time and don't rush, I went back out to take a look.

After I tried a few more exasperating times, I stopped, took a deep breath and stared at it. "Lo & behold", I realized the E10 was too big. I put the E8 on it...yea it fit...got it out, switched sensors, screwed it back in. Put the clip back on. Done. Car is purring like it never purred before.

Oh, & MikeR, John did take that plate off earlier. You're right, it made access easier, especially when I used the E8 instead of the E10. But we put it back.

Thank you everyone for all your help. I hope this takes care of everything. It sure feels like it when I'm driving. Now I just need to get that passenger visor.