Lexus 42431-48070 Disc, Rear

Before removing the brake disc on these models, activate the parking brake system's "pad replacement mode" using a Toyota Techstream scan tool or equivalent. An alternative method involves unplugging the electrical connector from the parking brake actuators, grounding one terminal on the actuator with a jumper wire, and applying battery voltage to the other terminal while closely monitoring the piston. If the piston extends outward (indicating parking brake application), immediately reverse the connections. Then, remove the lug nuts securing the disc and slide the disc off the hub.