Keyless Entry Remote battery

My wife's remote (02 elantra) still shows red when pushing
buttons but does nothing, the other remote still works.

Question; did I read right somewhere that you have 8
seconds to replace the battery before losing programming ?

 

That's not correct. The car is programmed to recognize the specific remote
you have. No matter how long the remote is unpowered, it'll still do the
same thing when you press the button.

The red LED indicates that the remote is powered and the button operates.
If the programming procedure doesn't fix the issue, you'll need a new
remote to solve the issue.

 

Thanks hyundaitech, I went out to the garage and tried but
this time I pushed much harder and YAY , it works........

Tried the other one and it too had to be pushed a little
more forcefully than when it was new, it will be harder to
lock it by 'accident' now.

She bought it new so maybe its time for new
batts..............are you saying it is not correct that
you can replace the batt without losing the programming?

Michael in Oregon

 

The programming will never be lost during transmitter battery replacement.

 

That's not correct. The car is programmed to recognize the specific

You won't lose the programming and you can replace the battery yourself too.
Use a sharp knife edge to pry open the remote and you will see the flat
battery that you can probably get in any department store.