Hi. I have a mazda 3. 2012.

The battery wouldn't start- I got a jump and took it to a store to get a new battery. New battery put in.. now I dont' have interior lights, radio, blue tooth, can't lock the doors, battery restarts every time I turn the car off and key fob doesn't work.

Took it back to store- they are ordering part from mazda- something about a main fuse being blown in the battery compartment. Mazda says the battery was put in backwards and this can impact the computer electrical system.

Will this fix the problem once the new fuse is put in?

 

Time will tell. You may be lucky.