My 2019 Sonata Limited 2.0t doing the same. 44000 mi the pads were wore but rotors looked good so I installed new pads. In a few thousand miles thus squeal developed when lightly braking in reverse. I blamed putting new pads on old rotors so I ordered new pads AND rotors. All was quiet for a couple thousand miles and it's doing it again worse than ever. If someone knows the solution I sure would like to know. I'm a retired fussy master mechanic and everything is correctly installed.
My 2015 is experiencing the same, after changing all four corners with new rotors and pads. Did you find solutions for yours?
My 2019 Sonata Limited 2.0t doing the same. 44000 mi the pads were wore but rotors looked good so I installed new pads. In a few thousand miles thus squeal developed when lightly braking in reverse. I blamed putting new pads on old rotors so I ordered new pads AND rotors. All was quiet for a couple thousand miles and it's doing it again worse than ever. If someone knows the solution I sure would like to know. I'm a retired fussy master mechanic and everything is correctly installed.