General Repair Information: Shims

WARNING: This page is about a different car, the 2017 Volkswagen GTI, 2016 Volkswagen GTI, 2015 Volkswagen Golf, and 2015 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.

Measure the shims at several locations with a micrometer caliper. Tolerance variations make it possible to find the exact shim thickness required.
Check for burrs or damage.
Only install perfect shims.