Why is my 2018 Porsche Panamera squealing from the front wheel even when I’m not braking?

A customer brought in a 2018 Panamera that squealed at the front-left wheel, even while coasting. We found overtightened brake carrier bolts had tilted the pad so its backing plate grazed the rotor lip. We replaced pads and rotors at all four wheels, fitted wear sensors, and flushed the brake fluid.