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must not be very loud then.
I'm guessing its just shitting commodore build quality.
what subs and amps are you running? I have to assume its not walled, or you wouldn't need a rear view mirror.
Dude, this is one of the few things you CANT blame on "shitting commodore build quality" [sic].
It's more likely to be due to his initial repair job, which obviously sucked. They will all fall off even on a Mercedes eventually...