Two problems related to brake master cylinder have been reported for the 2011 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Hyundai Sonata based on all problems reported for the 2011 Sonata.
Tl-the contact owns a 2011 Hyundai Sonata. The contact stated that while driving approximately 30 mph, the brake pedal was depressed but failed to operate and the contact would have to depress the brake pedal firmly to stop the vehicle. The contact discovered that the brake fluid was almost empty. The vehicle was repaired under NHTSA campaign number: 14v433000 (brakes). However, the failure persisted. The dealer diagnosed that the master cylinder had failed. The vehicle had not been repaired. The manufacturer was not notified of the failure. The failure mileage was unavailable. Ne.
The contact owns a 2011 Hyundai Sonata. While merging into another lane, the contact stated that the brakes were depressed and failed to engage. The contact pulled the emergency brake in order to stop the vehicle. The trunk would also open inadvertently. The dealer repaired the failure by replacing the master cylinder and module for the braking system and also advised the contact to open the trunk manually. The manufacturer was notified of the failure and filed a report. The failure mileage was 12,500 and the current mileage was 14,000. The VIN was unavailable.