Three problems related to cruise control have been reported for the 2006 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Hyundai Sonata based on all problems reported for the 2006 Sonata.
The cruise control comes on by itself during normal driving. After the "cruise" light comes on the "set" light illuminates and the vehicle accelerates without warning. The brake will momentarily stop the acceleration, but the acceleration resumes once the brake pedal is released. It occurs above 25 mph. It kept accelerating and would have continued if I hadn't hit the brakes. I happens regularly, and we have parked the vehicle.
On March 9th, 2015, I was driving home from work after picking up my infant daughter from daycare when several warning lights illuminated on the dashboard of my 2006 Hyundai Sonata; the airbag, abs, and esc off warning lights. In preparation for the upcoming left turn into my neighborhood, I tapped the brake pedal to disengage the cruise control and coast to the intersection. The cruise control did not disengage. I applied more pressure to the brake pedal to slow down, but upon releasing the brake the vehicle returned to the set cruise speed. I now applied as much pressure as I possibly could to the brake pedal and the cruise control set light did not disengage. The Sonata downshifted and revved up to 4k rpm attempting to overpower my braking. At this point it was too late to avoid the intersection. I placed the car into neutral and swerved to avoid hitting an oncoming vehicle and median, at the turn. The Sonata spun out and came to rest in the oncoming traffic lanes after overshooting the turn. I verified my daughter was uninjured then proceeded to drive the Sonata, at idle, the remaining 1/8th of a mile to my house. After arriving at home, I visited Hyundai's and the national highway traffic safety administration’s vehicle recall information web pages and found no recalls regarding my Sonata’s VIN.
The contact owns a 2006 Hyundai Sonata. While driving 65 mph with the cruise control activated, the vehicle suddenly accelerated to 85 mph. The brakes were applied, but the vehicle did not stop until the key was removed from the ignition. The vehicle was towed to the dealer. The dealer was unable to duplicate or repair the failure. The failure mileage was 25,500 and current mileage was 26,000. Updated 12-12-07.