as anyone experienced a loud noise while reversing and pressing on the brake ??
it's a 2k undefined

 

It could be the wear indicator on your rear brake pads. Time for new pads. Most people on here will tell you to stick with OEM pads instead of swapping them out for hi-performance or after market pads. What does everyone else think?

 

I use ceramic, might not be a super performance mod, but it sure does cut down on the brake dust ;-)