So far I've lost the one that controls the trip odometers, and one that controls the parking sensors only works on hot days. Are any of you having these kinds of electrical failures?

 

Not all that common. Have you had any work done on the car recently ?

 

Any possibility that the parking sensor module has got wet at some point?

Have a look at connectors to module and clean pins.

 

I haven't had anything major done for a while. The parking assist has been flaky since I bought it several years ago, and the trip odometer thing is recent. When you push the function button on the stalk nothing happens. I guess neither is a big deal, but it makes me wonder if mine is the only one with these module failures.