First off Thank you all for your insight. It happens both when the car is driving and sitting. It sounds like you are hitting the unlock button and just unlatches and lights come on inside. It sucks for the driver especially if the kids are in the car.Any advice on how I could test it? Really the only time it does not open is when it is locked. Either all doors locked or all doors locked and driver side unlocked its good. Anything other than that combination its unpredictble, but happens too often. Thanks again.