check to be sure the routing of belt is correct
That would be a judgment call on what the old belt looked like.
Check that the CKP Crankshaft position sender wasn't knocked out of alignment when you put on the belt. It is at the 10 o'clock position.
Get the new belt and start by removing the alternator
Possibly the wrong belt was installed or most likely your belt tensioner is bad.
The cost to replace a 1999 Mazda Protege serpentine belt will vary depending on the cost of parts and cost of labor. The prices for the serpentine belt start at $14.56.
The point at which you should have your serpentine belt changed depends on the vehicle. It is best to check the owner's manual. That said, under the best of conditions, the belt should last from 60,000 to 100,000 miles, depending on the vehicle. This doesn't mean the belt won't need to be adjusted at some point before it needs to be changed.
No only if it's a broken cam belt
you start by putting the belt on from left to right.
Only as needed. The serpentine belts hold up well unless there is a problem with the belt tensioner or any of the driven accessories.
You firts pull out the battery, and then you slip out the starter cables, and right where the belts are you snap those and that's where the serpentine belt should be changed.
Replace the tensioner. Stop it from getting wet by making some sort of shield to prevent water from getting to the belt.
No, an accessory belt is not considered a serpentine belt. However, a serpentine belt is considered a specific type of accessory belt.