Front Brake Disc Runout Check

WARNING: This page is about a different car, the 2017 Genesis G80. However, it is still accessible from the selected car via links, so may be relevant.

Place a dial gauge about 5 mm (0.2 in.) from the outer circumference of the brake disc, and measure the runout of the disc.
Brake disc runout

Limit: 0.025 mm (0.00098 in.) or less (new one)

Courtesy of
If the runout of the brake disc exceeds the limit specification, reinstall the disc after turning the disc 72° clockwise. Recheck the runout. If the runout exceeds the specification, try turning the disc by 72° and recheck the runout until a full revolution (360°, 4 steps).
If the runout cannot be corrected by turning the disc, replace the brake disc.
When installing brake disc, runout peak point markings (A) on disc and hub must be as close as possible (within 72° range).
After installing the new disc repeat procedure above 1~4 again.