2002 hyundai elantra keyless remote not working after changing battery

SOURCE: how do you change battery in key fob on 2002 vw golf

No problem. The key fob is two pieces. The key part and the remote. Open the key as you would to sue it. Where the key flips open you can see a small recess about where the line of the trunck switch. This is where the key separates. You can pull it off or pry it with a small screwdriver. Once separated with remote part in your hand this also splits in 2. In the same area you split the key off insert the screwdriver in this recess and the fob will open giving you access to the battery. Also can be done by hand. It is a little tight so you will have to force which is normal. No screws just clipped. Make sure the battery is positioned in the right way and that you have 3 volts when you test the battery. 2.7 volts will make the remote not work or act funny.

SOURCE: focus remote key fob not working

this info would cost you £30.+ at ford Radio Frequency Programming Instructions:

• Insert the ignition key and turn from position II (Ignition) to position 0 (All off) and back four times within three seconds.
• Remove the ignition key. The locking control system is now in "learn mode" for the next 20 seconds and the red warning system LED (By the clock) stays on continuously to indicate this.
• During the 20 seconds press one of the transmitter buttons. The remotes signal and code number is learned by the locking module and is indicated by flashing the warning system LED.
• Wait until learn mode times out (20 seconds) or switch the ignition back to ON.nfrared Programming Instructions:
• Put your key into the ignition and turn to position 1 (Radio). After approximately 10 seconds the red alarm control LED (next to the clock) should illuminate. As soon as it comes on remove the key from the ignition - the LED should remain lit.
• Point the remote's "eye" at one of the front door sensors and press the rear button until the light on the transmitter illuminates (Keep the button pressed)
• With the rear button held in press the front button 4 times then release both at the same time. The control lights in both clock and fob will flash 4 times to indicate programming complete.
• Turn the ignition back on to exit programming mode

SOURCE: 1997 Toyota Avalon Key Fob is not working

you can take it to a dealer and they can reprogram it for you.. good luck keith...

SOURCE: key fob for hyundai elantra not working

Please dont worry yourself so much the security locks needs to be reprogrammed to enable it work effectively. Same happens to other vehicles as well.

Consult Hyundai garage close to you or if you have it in your manual.

Good luck.

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SOURCE: car key fob not working and locking car

i have a rover 25 and the key fob is not opening the car i could use the key to open it but the alarm will go off and cant stop it without the fob...