Vehicle Information: * Year: 2021 * Make: Genesis * Model: G80 * Vehicle Identification Number (VIN): [XXX] ] * Mileage at time of incident/problem start: Approximately 26,377 miles Problem Description: The issue began around [XXX]. When pressing the brake pedal, whether the vehicle is completely stopped or while driving, a distinct clicking or ratcheting sound is heard. The sound is clearly audible inside the cabin and is slightly louder when listening under the hood. The sound appears to be originating from an area near a valve or other component (possibly related to the brake booster or ABS system). The sound is always present when the brake pedal is depressed, regardless of the amount of pressure applied (whether pressed firmly or smoothly) or the state of the engine (the sound occurs even when the engine is off). Currently, the brakes function and the vehicle is able to stop. There are no warning lights illuminated on the dashboard indicating a fault in the brake system or any other system. Actions Taken So Far: The vehicle has not been taken for service regarding this specific issue yet. I have a scheduled appointment with an official Genesis dealer on the upcoming [May 7, 2025] to have the problem inspected and diagnosed. Reason for Submitting This Report: Although the brakes are currently functional, this unusual and persistent sound from the brake pedal is a significant concern and suggests a potential malfunction in a core component of the braking system. Since brake issues directly relate to the safety of the occupants and other road users, I have decided to report this potential defect to NHTSA for documentation and to contribute to any future investigations regarding the safety of the 2021 Genesis G80 model. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)