I purchased a Toyota Highlander 4dr 4WD 4ect as a previously owned vehicle with a previously owned vehicle warranty. After owning and using the vehicle for a few months while driving in a traffic situation, the right side rear brake suddenly locked up intermittently accompanied by swerving, by panel vsc light flashes and an audible warning. This situation fortunately occurred near our residence on dry pavement. By driving very slowly we managed to get the vehicle to a safe location. It was then towed to a local Toyota dealer where it was inspected and the following diagnosis or similar was provided: Customer states that the vsc lights are coming on and the brakes are locking up, yaw rate sensor is out of calibration. Recalibrated yaw rate sensor. The vehicle was released to us as repaired. The precise same vsc failure situation occurred on October 11th of this year and again we were lucky to have been in a reasonably safe location and driving under good road condition when it happened. The vehicle was picked up and towed again to the dealer facility for analysis and repair. We received the diagnosis: "electrical repair, customer states that the vsc lights are coming on, and the brakes are locking up, yaw rate sensor is out of calibration. Recalibrated yaw rate sensor?. I was told by telephone that ?the previous repair lasted two years". any reasonable person would consider that the potential useful life of this vehicle should exceed two additional years. Furthermore, the failure could potentially reoccur immediately. After being told it was test driven and pronounced safe to drive I think that this is an unsafe situation waiting for another event to occur and that an accident could result from another instance of the vsc system failure. The problem was not properly located or properly repaired in each of the two occurrences. A proper repair of the vehicle after the first event would have prevented the second.

- Walkersville, MD, USA