Some 2014-2015 Lexus IS250/IS350 and 2016 IS200T/IS300 and IS350 vehicles may exhibit a rattle type noise from the rear parking brake assemblies when driving over bumps.
Adjust the parking brake (refer to the service manual). Make sure that the No. 1 wire adjusting nut is completely loose during adjustment. This will ensure that there is no gap between the shoe and anchor inside the parking brake assembly. If a gap is present, a rattle noise may occur.
Road test to confirm.
If the rattle is still present, remove the parking brake shoes and parking brake shoe lever sub-assembly.
Clean up the parking brake shoes, lever sub-assembly and backing plate.
Apply disc brake grease to the areas of the parking brake plate, which makes contact with the shoe and anchor block sub-assembly.
Road test to confirm the repair.
Clean and apply disc brake grease to the areas of the plate that make contact with the shoe and anchor block.
