Measure The Lateral Run Out

Fig 1: Identifying Test Gauge Point Against Brake Disc

Courtesy of VOLVO CARS CORPORATION

Put the test gauge point against the brake disc as illustrated.

Rotate the brake disc.

Note the test gauge run-out. Brake disc lateral run-out must not exceed 0.050 mm.

If lateral run-out exceeds the value, replace the brake disc.

To replace brake discs on the XC90, see: BRAKE DISC REAR, REPLACING .