| Issue ID | 1082486 |
| Internal NHTSA # | 10607225 |
| Manufacurer | Hyundai Motor America |
| Brand | HYUNDAI |
| Model | SONATA |
| Model Year | 2012 |
| File date | 03/03/14 |
| Component | VEHICLE SPEED CONTROL |
| Product type code | VEHICLE |
| Description of the problem | I took my car into the hyundai dealer for a 30,000 service. They said the computer has an upgrade to the software. After the upgrade, the cruise control speeds up by 4 - 5 miles per hour when it is set. For instance, if you set it at 65 mph, it will speed up to 69 or 70 mph and then slow back down to 65. It does this when you initially set the speed or if you brake and then hit the "resume" button. In the case of "resume", if you initially set it at 65 mph and use the brake to slow down and then use the "resume" button, the car will speed up to 69 or 70 before going back down to 65. The cruise control will do this no matter what speed you initial set it at. I took the car back in and the service people thought it was strange. So they said they ran the upgrade to the software again, but it has the same issue. They then told me that the surge in speed was within an acceptable tolerance range. I have owned many cars with cruise control and none of them have ever done that and this car did not do it prior to the software upgrade. It is pretty dangerous if you are not paying attention. |
| Vehicle Mileage at Failure | 35000 |
| Number of Occurences | 1 |
| Source of the issue | NHTSA WEB SITE |
| City and State | ALBUQUERQUE, NM |
| VIN pattern | KMHEC4A41CAXXXXXX |
| Was vehicle invloved in a crash? | N |
| Was vehicle involved in a fire? | N |
| Was incedent reported to police? | N |
| Was medical attention required? | N |
| Was part original equipment? | |
| No. of injured persons | 0 |
| No. of fatalities | 0 |
| Date of purchase | 07/08/26 |
| Was original owner? | N |
| Anti-lock brakes | N |
| Cruise control | N |
| Number of cylinders | 4 |
| Drive train type | |
| Transmission type | |
| Vehicle speed | 65 |
| DoT tire identifier | |
| Tire size | |
| Location of tire code | |
| Type of tire failure code | |
| Was defective tire repaired? | |
| Date of manufacture | |
| Type of child seat code | |
| Type of restraint | |
| Dealer's name | |
| Dealer's telephone number | |
| Dealer's city | |
| Dealer's state code | |
| Dealer's ZIP code |