The contacts son owns a 2011 Hyundai Genesis Coupe. The contact stated the brake light was illuminated. The vehicle was taken to a certified mechanic who performed a pressure test and determined that the ABS module had failed due to a leak. The contact was informed that the ABS module needed to be replaced. The contact stated that brake fluid was added for the brake light to turn off. The dealer informed the contact the vehicle was unsafe to drive. The vehicle had not been repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 57,444.