Hell, even my dealership "only" charges $80 per wheel. Though we quickly learned the local tire shop does them for $40 a pop with a much quicker service. I generally just let the dealer service our car since there's not many mechanics in the area qualified to service hybrids anyway, but hell if I'm letting them rip us off on anything related to the tires again (even though their prices for Toyota factory tires are quite fair, I'm not paying an extra $40 a tire for the sensors when we buy a new set).