Autozone carries the 120 Amp Main Fuse
 

Just a tip, Autozone stocks the 120 AMP main fuse for the FD. It's about $3. The part number is FLM-120. When I was looking for the fuse I read most people getting them from the stealership or ordering them online and paying over $6 for them.

They do not have the 130 amp so to the dealer .I have the 120 amp from Advanced Auto Parts in the tool bag for a spare on the road,I have never needed it .It has been there for several years so I do not remember the cost .

Oh is the stock FD main a 130 amp? The one that came out of mine was 120 amp. Must have already been replaced with a 120 then

shit, the S4 second gen fuse is only 80A, so will a difference of 10amps make a big deal?

Na it won't make a difference. Mazda probably just wanted to make money off people so they sell a 130amp fuse that autoparts stores don't stock, that way they can sell it for twice as much and somehow make it justifiable.

Things electrical are NOT my strong suit, but guessing that going with slightly smaller fuse (120 vs. 130) is OK, you just wouldn't want to go larger??
For the price, I might just pick a spare one up to keep in the car as David G. has.

Even going larger wouldn't make much difference. It's there to protect the wiring, but given the size of the wiring even a 30 amp larger fuse would pop long before the wiring is in trouble.