I had to replace the originals at 5000. Now with an additional 7000 on the sintered that I got from Brent, they still have a lot left.
When you replace them, look at the calipers and see where all the sliding parts are. The bolts for one and I believe some flat places. Put a film of white lithium grease on all the sliding parts. It's heat resistant and water proof. I've done this on all brake calipers, as well as the contact points on drum brake shoes, for the last 30+ years.
