Milt : if I had to guess....
Those silver washers under the bolts, you added them right?
If so, DON'T. Just put the bolt straight onto the bracket, using ONLY that brass-colored (smaller) washer if necessary.
I think what happened here is those silver washers aren't getting truly "flat" on the bracket but rather are going slightly into the bend. When you crank it down, it's putting stress into that bend.
Over time, it makes the bend a lot weaker than it otherwise would be.....until it snaps the bracket [img]smile.gif[/img]
I'll look carefully at mine next week (when I'll finally get a chance to get under the car) and let you know what I find.
Also forgot to mention : I am using those brackets on the back of my Subaru as well, no issue. And that car had a WELL known issue with the OEM bar brackets.....so much so that Subaru themselves revised the bracket (to a design more like what ES is using, albeit rubber bushings and not greasable) starting with the 04 WRX/STI despite the fact that they didn't change the bar size in those years!