Keyless entry is one of those things that is taken for granted, until it doesn't work. Those tiny key fobs are complex electronic devices. They're dropped. They get wet. They're even scratched by the very keys they hold. When they stop working, it's inconvenient. Replacing the key fob can be very expensive. Most cars require their own model key fob that must be purchased from the dealer. Repairing a key fob can save a lot of money.
Open the key fob. Look carefully at the seam between the two halves of the key fob. There will be a slight indentation. Slip a screw driver into this notch and gently pry the two sides apart.
Pull out the battery. Remote keyless entry fobs use a button type battery. Take the battery to a jeweler or battery store and have it checked. In many cases, simply replacing the battery will repair the remote.
Clean the interior mechanism. Kept in a pocket or purse, many key fobs accumulate dust, dirt and lint. Gently blow any debris from the interior of the key fob.
Glue any loose pieces of the plastic cover. Use a cyanoacrylate glue such as crazy glue or super glue. These bond the plastic instantly. Wipe any glue that may have spread to the edges. Allow the glue to completely dry before fitting both sides of the key fob together.
