rear brake grinding noise at low speed

not that i have read, have you returned to the dealer? maybe a dragging pad or e brake is not releasing all the way.
or it might just be something in there rubbing.

 

Just to be clear, is the noise only there when you are braking?

 

I won't go as far as recommending a full "bedding your brakes in", but would suggest one medium/hard 50 mph to 2 mph braking event.

Then let everything cool down, maybe your issue goes away.


Rob43

 

Since it is new and still under warranty, I would strongly suggest taking in to the dealer to have it checked out.
Before you go, practice demonstrating the noise.

Not sure it would be a good idea to make any "hard stops" if there might be something wrong back there.

 

no reply

 

Same here. As long as it doesn't indicate a problem, I am not worried about it.

 

Generally if you are not experiencing vibration, the vehicle pulling to one side, or any unsafe abnormal vehicle behavior while under braking, I would not be concerned. The noise is occurring because there is rubbing somewhere between the brake pad and brake caliper system that holds the brake pads in place. When you are braking, there are shims and anti rattle clips between the brake pads themselves and the brake caliper that try to hold the brake pads steady and firm when under braking. Those skims and anti rattle clips just need to have some brake anti-seize applied to them. Pretty much lubricant for where those clips will come into contact with the brake pads and caliper.

NOTE: YOU DO NOT PUT LUBRICANT BETWEEN THE BRAKE PADS AND ROTORS.

Here is a good diagram that can help you understand what is going on.

https://www.aa1car.com/library/disc_brake_floating_caliper_assembly.jpg

Here is a good video on how to fix this problem yourself if it really bothers you.
Edit: Its a 15 minute video. To jump to the most likely noise for your case, he starts around the 9 minute mark. Because your vehicle is new, it is most likely rubbing on parts that hold the brake pad in place that need to move as you depress the brake pedals.