Lexus 42431-0E011 Disc, Rear

Visually examine the disc surface for score marks and damage. Note that light scratches and shallow grooves are generally normal, but deep scoring exceeding 0.039-inch (1.0 mm) requires disc removal and refinishing by an automotive machine shop. This assessment should be conducted on both sides of the disc.

If the rear disc is challenging to remove due to interference with the parking brake shoes, remove the plug and rotate the adjuster to move the parking brake shoes away from the drum surface within the disc, using a screwdriver inserted through the hole (ensure the hole is positioned at 6 o'clock, where the adjuster is located). For installation, place the disc over the threaded studs, install the caliper bracket, tightening its bolts to the specified torque, and then install the caliper, tightening its bolts to the torque.