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It's a two part sliding mechanism. Hold the key in your hand with the key bit pointing forward and the larger part of hosing to the right. Now with your thumb on the back of the fob supporting the thinner section and your other two fingers on the larger section, on the front of the fob. Push backwards with your two fingers supporting with your thumb. It is quit stiff so a fair bit of pressure is required.
AnswerOn a Hyundai factory-supplied key fob such as that used on the 2002 Sonata or XG350 there is a riveted leather strap connecting the key to the fob. Slide this strap to the side and you will see an opening between the halves of the fob. Stick a slim screwdriver into this opening and twist it until the two halves separate. This will expose the circuit board and the battery (usually a CR2032 3V lithium battery). Pop the battery out of its holder being careful not to lose the metal conductor/tab that connects the positive side of the battery to the circuit board. Make a note of how this metal conductor/tab sits within the battery "pocket" in case it falls out. Replace the battery making sure the conductor/tab is in place. Once the battery is popped into place it holds the confuter/tab in place as well. Make sure the dust/water o-ring surrounding the fob is intact and carefully press the two halves back together until they "snap" closed. Test that the fob works correctly by unlocking and locking the car doors. You should not need to program the fob if you are just replacing the battery.Hope this helps those who were going as crazy as I was when all they wanted to do was replace a simple battery.
What else can I help you with?
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