Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Inspection

(a) Using a ruler, measure the rear disc brake pad lining thickness.

Standard Thickness:

9.5 mm (0.374 in.)

Minimum Thickness:

1.0 mm (0.0394 in.)

If a rear disc brake pad lining thickness is less than the minimum thickness, replace the rear disc brake pads.

HINT:

Be sure to check the rear disc thickness when replacing the rear disc brake pads with new ones.

(a) Using a micrometer, measure the rear disc thickness.

Standard Thickness:

18.0 mm (0.709 in.)

Minimum Thickness:

16.5 mm (0.650 in.)

If the rear disc thickness is less than the minimum thickness, replace the rear disc.

(c) Using a dial indicator, measure the disc runout 10 mm (0.394 in.) from the outer edge of the rear disc.

Maximum Disc Runout:

0.15 mm (0.00591 in.)

NOTICE:

Keep the magnet of the dial indicator away from the rear axle hub and bearing assembly and rear speed sensor.

If the runout exceeds the maximum value, change the installation position of the rear disc to minimize the runout. If the runout exceeds the maximum even when the installation position is changed, grind the rear disc. If the rear disc thickness is less than the minimum, replace the rear disc.