Jet Jockey/A4 Pilot

It may not affect your cars but keep an eye on it anyway.

This is a quote from an engineer that knows a few things about brake kit bracket designs and I included it as another opinion on this matter.

"Thanks for the heads-up. I scanned through the thread. My first
impression was "that's not right", as a crack in material should not
be that straight; it should be jagged and following a seemingly random
pattern around the grains. I'm thinking this may be some kind of
material issue.

Second, the guy claims he torqued it properly. Fine, I'm in no
position to second-guess that. However, the core reason I went with
steel inserts instead of threading the aluminum directly for the
fastener was because of fears of over-torquing, pulling out threads,
and/or stressing the material to the point of cracking. I suggest ECS
did not take this into consideration.

Finally, this is the reason I chose 6061-T641 instead of 7075. 7075
has a higher yield strength, but - TA DA! - is prone to cracking. I
knew that 6061 has more than sufficient strength for the application;
there was no need to use 7075 with its associated risks."<ul><li><a href="https://forums.audiworld.com/tt/msgs/1557755.phtml">https://forums.audiworld.com/tt/msgs/1557755.phtml</a</li></ul>