One piece replacement electronic hand brake switch for Mazda CX4 automatic parking brake switch button Easy to install: Parking Brake Actuator Motor manufactured to strict OEM standards; replaces old or broken units and improves time efficiency. OEM compatibility: Parking Brake Actuator Control Unit is designed to have the same shape, fit and function as the original OEM part. Function: The electronic parking brake operates by the friction between the brake disc and the brake pad to control the parking brake. Benefits at a glance: restores reliable electronic parking brake operation, provides an OEMlike fit and interface, and supports safe and consistent parking brake performance. Use scenarios: 1) Replacing a failed or worn parking brake switch on a Mazda CX4 to restore automatic parking brake function. 2) During routine brake system maintenance or diagnostics when the parking brake actuator shows signs of failure. 3) As an OEMgrade replacement to maintain original vehicle performance and safety in Mazda CX4. Notes: Designed to match original form and function for a straightforward swap and dependable operation.