My MDX has started having pretty loud squealing when braking at low speed. I had done proper break-in when I picked it up making sure to avoid rapid braking and so on. And yet here I am

Has anyone else experienced it?

 

re-grease pads, shimmies, and slider pins

 

I took it to the dealer, they lubricated all the brake parts, sanded down the brake pads.

The squeal has been reduced, but it still happens