TL* THE CONTACT OWNS A 2007 CHEVROLET COBALT. THE CONTACT STATED AFTER LOCKING THE DOORS WITH THE REMOTE KEYLESS ENTRY, THE DOORS WOULD UNLOCK INDEPENDENTLY HOURS LATER. THE CONTACT STATED THAT HE HAD CHANGED THE BATTERIES IN THE REMOTE BUT DID NOT REMEDY THE ISSUE. THE CONTACT ALSO PURCHASED ANOTHER KEYLESS ENTRY REMOTE AND THE FAILURE RECURRED. THE CONTACT CALLED THE MANUFACTURER REGARDING THE FAILURE AND THE MANUFACTURER COULD NOT PROVIDE ANY ASSISTANCE TO THE CONTACT. THE CONTACT WAS CONCERNED WITH VANDALISM OR THEFT. THE FAILURE MILEAGE WAS 105,000. THE VIN WAS NOT AVAILABLE.