I'm going a bit wild here after finally learning how to upload photos. These are from 2012. The car was an '01 Mazda Protege SE - very basic - 1.6 l engine, 5-speed manual, no air, crank windows. The TB was original @ 190K km, and still looked great. Changed it anyway for peace of mind before a long road trip.
From the school of hard knocks, I've learned that these jobs go better when I mark the old belt in place, and then transfer the marks to the new belt before it's installed.
I changed the idler pulley and the tensioner spring as well.
We bought the car in 2005 @ 66K km, and ran it on Mobil 1 5W-30 thereafter, changed Spring & Fall @ intervals that varied from about 7500 km to 10K km.
The car went to the boneyard in 2016, on the road for 15-1/2 years, only 245K km on the clock and no major repairs, but unsafe due to rust.