96 Miata - 80a fuse is now welded into the holder & car won't start.

SOURCE: Mazda Miata 2001 car problem

Batteries can have a dead cell in them, meaning there is sufficient charge to run accessories and the "check glass" may look fine (dark green in color on maintenance free batteries), but one dead cell in the battery indicates replacement time.

SOURCE: '05 mazda 6 will not start with new battery

I have an 06 Mazda 6 that has had starter problems since new. On servicing I have told them of the problem but it never happens when they have it, this has been ongoing for 3 years since new. They told me the battery was weak but I insisted that it's happened since new so why would that be the problem unless I've had a weak battery for 3 years. Then on my last service they couldnt' start it so replaced the starter motor under warranty. The car started fine for a few weeks but now is not starting again. I have also found that this generally only occurs in hot weather or when I have re-started the car numerous times in a short period of time.
Not really a solution but FYI for other Mazda 6 owners.

SOURCE: 1999 Mazda 626 won't start.

try to boost the battery if star replace battery

SOURCE: I have a 2002 Miata. I went out to start it, it won't start.

sounds like the immobiliser is stuck on ring Mazda up and they will tell you how to reset it you have to turn the key put foot on pedal press a button on stalk and turn key off .ring Mazda and find out off them and this should solve ya prob .hope Ive bin a help Steve

SOURCE: Hi, I have 96 mazda

its possibly burned out the ciol spring that gets hot try a new cig lighter insert if phone charger or acc power supply arnt working when pluged in check that the socket has good earth and power to the back of it if it has power to the socket but still not working socket may need replacing u can try cleaning it out so it will make a better conection