mp5spicy - Did it fix the problem?
It mostly flicks when the fan comes on when both with the heat and the regular thermostat relay, the idle usually messes up at the same time.
I only have the stock stereo so i don't think its that. Its more of a sparatic thing. not with bass.
I know the yellow cap batteries are awesome and usually fix peoples dimming lights with big stereos, but its a new car. stock, and mazda should fix it.