A problem with the internal circuitboard in the remote can cause an intermittent complaint of the remotes being inoperative. Replacing the remote will correct the problem. An updated remote was introduced into production @ VIN's 46019651 and 41063613. To identify an late style remote, remove the hard door key from the remote and locate the numbers imprinted into the end, under the hard key. A series of numbers (example 316-C-309) will be seen, the first in this series of numbers identifies the build date of the remote (316 in the example). A number higher than 425 indicates an improved remote.