Help! My 2007 Mazda 3 recently started unlocking the doors as I was driving the car. If the doors were locked, they would unlock and if they were unlocked they would just keep unlocking. Annoying but manageable. I've recently discovered that the car is also unlocking when it's parked so I've come back to a car that I KNOW I locked to find it unlocked. This clearly makes me nervous since I live in a city and would prefer that my car or its contents not be stolen by someone who notices that it's unlocked. A new battery and 60k mile service failed to unearth any major problems. Do you have any suggestions?