Thickness variation inspection

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

Clean the disc plate-to-pad friction surface using a brake cleaner.
Measure the points indicated in the illustration using a caliper (micrometer).
Subtract the minimum value from the maximum, and if the result is not within specification, machine the disc plate using a lathe.
Thickness variation limit
1. 0.015 mm {0.00059 in}
Fig 1: Identifying Measuring Points On Disc Plate
Courtesy of MAZDA MOTORS CORP.
WARNING:
- Do not exceed minimum disc plate thickness.