2003 Sonata Keyless Entry
 

I read that after about 3 years the battery may need to be replaced. It will
be obvious when you have to press the lock button more than once. I replaced
the battery when I had to press the button more than once. Actually, I was
buying a Seiko watch and asked the sales person to replace the battery. Even
with a new Seiko battery, I still have to press the lock button several
times to lock the car. This isn't all of the time. But, maybe once every 3
or 4 times. I have noticed that it's more frequent after I walk through the
security sensors in malls. What do you think? Is this a conspiracy theory or
have you had problems getting the remote lock to work?
Thanks for reading,
John D.