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How to Fix a Key Fob That isn't Working If your key fob doesn't work then you can fix it with just a few steps. First, ensure that it's not the backup remote. If the backup remote is able to lock and unlock your car door, then there's a likely issue with the main remote. key fob repairs with car remote keys result from circuitry or battery problems. Battery It is not uncommon for the battery inside a key fob for cars to wear out. It is easy to replace the battery. However Read Significantly more is essential that you use the correct kind. You can check your owner's guide or contact the manufacturer to inquire about the right type. It is also crucial to inspect the battery compartment, as dead batteries can leak toxic chemicals that could damage the remote. If replacing the battery does not solve the issue there may be additional issues requiring professional attention. If the buttons are stuck or broken for instance it could be necessary to take the remote apart and rework each component. You can also try reprogramming the vehicle to recognize the new key fob. Buttons Key fobs can get dirty and worn out from frequent use. It is not uncommon for buttons to cease working, or to require a hard press to get them working. This can be extremely frustrating particularly if you're out of town and need to start your car. Fortunately, even worn out or broken buttons can usually be fixed with a bit of time and a few items you have in the home. First, ensure that the batteries are up correctly and that the indentation on the back of the button is filled. Open the remote carefully and examine the circuit board. Look for signs of rust or other indications that the buttons have been damaged or worn out. For example the paint that conducts electricity could be missing. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contact that has become worn out or where conductive paint is missing. Avoid rubbing too hard as this can erode the conductive paint and stop the button from firing when it is pressed. Also, carefully check the battery connector's terminals to ensure an unattached solder connection. Soldering them back in place will restore the button's functionality in the event that this is the case. The same process can be used to restore function to any other loose connections within the fob. If any of the rubber buttons on the front of the keyfob aren't functioning or require to be press extremely hard the graphite disks on the back of the button may have worn out and will require replacement. It is usually done by rubbing a pen over the disks. This should bring the button back to life. If none of these solutions work or you are unable to get the button to respond when you press it hard, it is possible that the circuitry is failing. It is possible to fix this by a quick clean, and refitting, but it's ideal to have a spare fob available in the event this method fails for you. Circuitry The circuit board in the remote control could be dirty, regardless of whether the buttons on the key fob function or not. The issue can be solved by a thorough inspection. The most common causes for dirty circuit boards are water and damaged cases. A damaged case can allow water and other debris to get in and short circuit the electronic components. Water can also damage pins and vias, which are tiny connectors that are found on the board. If you're skilled enough to open your key fob, and don't mind making some mess, we can remove the buttons from their sockets and then solder new ones. Also, you should check the connections between the battery terminals. They can get very dirty and if they're loose, the buttons may not work or even stay in their down position. Soldering the terminals and buttons back in place is usually all it takes to restore the key fob that is not working to working order. Non-Remote Transponder Chips Sealed non-remote transponder chips are more durable than remote fobs that have them but they can still be broken by a hole being made in them or pushed over by a lawnmowers or door handle for a car. Most of the time non-remote transponder chips fail, and this can be blamed on an exploded fuse. If you're handy enough to remove a key fob that is sealed and can tolerate the mess, you can take off the circuit board and test the fuse with a multimeter for proper diode function. If you don't feel comfortable with this, you can visit your local Oreilly or hardware store and use their RF frequency tester. This will let you know whether the key fob transmits signals. Programming Key fobs are not indestructible and can be damaged by a lot of things. They may lose their connection to the car's receiver because of shock or a low battery, which calls for them to be reprogrammed. A professional auto locksmith or a main dealer will be able to reprogram your key fob to get it back up and running. If, in the unlikely event that resetting and repairing your key fob doesn't work it could be the time to replace it completely.