Thanks. I'd seen those, but wasn't sure where that actually referenced with respect tot he cabin trim, as opposed to the hatch.
Well, this morning, the camera worked, then when I got to work, it didn't, so it seems to be an intermittent failure. This means that if I take it to the dealer, it'll probably work perfectly until I leave, because that's how it is with intermittent failures.
Overall, this is more annoying than a serious failure, but I do worry about rearward visibility. That back window is small, far from the driver's seat, and high, which makes it difficult to see what's back there. The camera was helpful for peace of mind. Well, I still have the sensors which are happy to beep at me to let me know that I'm too close to something that they can/will detect. It works fine for parallel parking. (I have not yet tried the park assist, I'm not sure how much I trust it.)
2012 Focus Titanium Hatchback
121,000 km, all stock
1990 Toyota Supra turbo
I think the cams are still stock...