im sure that if toyota wanted to.. they could blame ANY electrical problems you might have.. to this "the sensor support bracket needs to be mounted to the main (relay) fuse box."
... "oh sir, the reason that your trunk light doesnt work is because of the bolt installed to the main fuse box... whoever mounted that there, must have broken the required circut"
- toyota already blames certain electrical problems to aftermarket gauge overlays - since you need to remove the gauge cluster to install them.
BUT - I've seen several Intakes
installed and never heard of the owner getting flak from their regular maintence toyota dealership.