look, think logically here.
say you install a new radio. then your turbo goes out. guess what? you got a claim.
now if say the HVAC goes out. they trace it back to a bad install of the new radio, you are charge for diag fee, and everything else.
now there are dealers that one look at you car, they will refuse to work at it, talk to the service dealer.
if they still refuse, find another dealer and email SOA.