There have been issues with front brake upgrades causing DTCs to set in the EBB due to the additional fluid volume of the larger multi-piston calipers. I suspect they may be encountering the same issues with the rear, in addition to the electric parking brake challenges.I know this is an old thread, but is there a simple way to explain why there are no BBK upgrades that can be installed on the rears for the gen3? Some vendors quote the electronic brake, but I believe late year gen2 had the electronic brake, and rear kits were still available.