I have a 1996 Ls 400, 18400 miles, mint condition. Bought it this summer no problems everything but heated seats work. I live in upstate NY and its been getting colder, lots of snow. The other day I locked my door via remote door lock that comes with the keys from lexus. It ussually makes a loud chirping sound letting know the door locked. This time the chirp was much quieter. The next few days I locked and unlocked my door and the volume of the Chirp was back too normal. Today when I arrived at work the chirp was suddenly much quieter again. Anyone encounter this problem and could it have anything to do with the cold? Is the car letting me know battery in remote door entry is dieing, or is the chirping mechanism its self dieing because of the age of the vehical. Thanks for Helping.