WASHINGTON (AP) — Hyundai has agreed to pay a $17.35 million fine for delayed reporting of a brake defect affecting Genesis luxury cars, the National Highway Traffic Safety Administration said Thursday.

The defect involves corrosion in critical brake system components that can reduce braking effectiveness and increase the risk of a crash, NHTSA said. Hyundai was aware in 2012 that brake fluids used in the model year 2009-2012 Genesis cars did not sufficiently inhibit corrosion in key components of the vehicle’s brake system, the agency said,