The government says they can’t find evidence of a safety defect with the electronic parking brake in the 2016 Sonata. They’ve closed their investigation.
Safety regulators knew that Hyundai had issued a technical service bulletin to dealers in May 2016 about problems with the electronic parking brake systems and NHTSA wanted to know if the proposed repairs did indeed fix the cars.
The optional electronic parking brake uses an electric motor to push the rear brake pads against the rotors. The brake is supposed to disengage when the transmission is shifted into gear with the ignition on.
Owners report that the brakes aren’t getting enough clearance after disengaging, causing premature wear and – in at least one case – a fire.