Electric Parking Brake actuator

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2020 Acura RLX, 2019 Acura RLX, 2018 Acura RLX, 2017 Acura RLX, and 2016 Acura RLX. However, it is still accessible from the selected car via links, so may be relevant.

The electric parking brake actuator operates when the parking brake applies or releases.
The parking brake motor can be heard at the rear wheels when the parking brake is applied or released, this is normal.