It can be installed at any Mazda dealer.
Just so everyone knows. Those who are eligible for the door plate, and decide to get the shock sensor upgrade from Mazda, should get the parts and labour for FREE! If a dealer tries to charge you anything they are ripping you off! MOT is doing the installs free of charge since this is what is supposed to be done.
Again...DO NOT PAY FOR THE SHOCK SENSOR UPGRADE (if you are eligible for it)