Disc Thickness and Parallelism

Thickness and Parallelism Inspection
1. Raise both sides of the car, and support it on safety stands. Remove the rear wheels.

2. Move the caliper and pads out of the way.

3. Using a micrometer, measure disc thickness at eight points, approximately 45° apart and 10 mm (0.4 in) in from the outer edge of the disc.

Brake Disc Thickness:
Standard: 21.0 mm (0.83 in) max.
Service Limit: 19.0 mm (0.75 in)

Brake Disc Parallelism:
The difference between any thickness measurements should not be more than 0.015 mm (0.0006 in).

4. If the brake disc is beyond the limits parallelism, refinish the disc.

Max. Refinishing Limit: 19.0 mm (0.75 in)