NHTSA Complaint #11426052 — 2011 HYUNDAI SONATA SERVICE BRAKES

Complaint Details

ODI Number	11426052
Vehicle	2011 HYUNDAI SONATA
Component	SERVICE BRAKES
Date of Incident	July 22, 2021
Date Filed	July 22, 2021
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	MD

Consumer Description

Without warning, the Sonata stalls while in motion: - the brake pedal goes close to the floor, - the CHECK BRAKE light goes on, - the emergency brake audio alarm and light go on, - the READY light between the fuel and temperature gauges blinks. I have to pull over and turn the car off / on in order to get the car functional again. The speed of the car doesn't seem to matter. This has occurred 11 times over the past year, including 6 times today (7/22/2021) within a span of 15 min, while at speeds between 30- 60 mph. I took the car to the dealer (initially on 6/22/2021). There were no diagnostic error codes and they could not reproduce the problem. I called Hyundai, both on 6/22/2021 and today, to file a report. Hyundai did not provide any insights into the issue. Online, I have read of others having this same issue with Sonatas. Some believe a faulty power brake booster to be the cause.

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