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How to Fix a Key Fob That isn't Working If your key fob doesn't work, a few easy steps can fix it. First, check to make sure it's not your backup remote. If your backup remote is unable to lock and unlock the doors of your vehicle, it is likely that the main remote isn't working. Most car remote key failures result from battery or circuitry problems. Battery The battery inside a key fob can wear out over time. It is easy to replace the battery. However, it is important that you use the correct kind. You can consult your owner's manual or call the manufacturer to find out the correct type. It is also a good idea to inspect the battery compartment with care because dead batteries can release caustic chemicals that could cause damage to the remote. If changing the batteries doesn't solve the issue it could be that there are other issues that require professional attention. If the buttons are broken or stuck, for example it might be necessary to take the remote apart and rework each component. It is also possible to reprogramme the vehicle to recognize the new remote. Buttons From frequent use, key fobs may become worn and dirty. It is not common to have buttons stop functioning, or require a long push to make them work. This can be a hassle, especially when you are away from your home and need to start your car. Even worn-out or malfunctioning buttons can be fixed with a little effort and the tools you already have at home. First, check that the batteries are properly charged and that the indentation on the back of the button is filled. Then, carefully remove the remote and inspect the circuit board. Look for signs of corrosion or other indications that the buttons are worn or damaged, like missing the conductive paint. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contacts that have become damaged or have conductive paint missing. Don't rub too hard as this can damage the conductive paint and prevent the button from firing when pressed. Check the battery connector's terminals carefully for any loose solder connections. If this is the case, simply connecting them back can restore functionality to the button. The same procedure can be used to restore functionality to any other loose connections within the fob. Finally, if any of the buttons made of rubber that are on the front of the key fob stop working or require a very long press to function it is likely that the graphite disks on the back of the button are deteriorating and require replacement. This can be done by rubbing a pencil over the disks. This should bring the button back to life. If all of this doesn't help, or if the button doesn't respond to a firm press It could be that the circuit board has gone bad. This can be fixed by a quick clean and replacing the solder, but it is ideal to have a spare fob on hand in the event that this method doesn't work for you. Circuitry The circuit board of the remote control could be dirty regardless of whether the buttons on the key fob work or not. This issue can be fixed through a thorough examination. Broken cases and water are the most common causes of boards that are dirty. A damaged case can allow water and other debris to pass through and short circuit the electronics. Water can also damage pins and vias, which are the tiny connectors that are found on the board. If repair car key fob are handy enough to open your key fob, and aren't afraid of making some mess, we can take the buttons out of their sockets and then solder new ones. It's also worth checking the battery terminal connections. They can become extremely dirty and if they're loose the buttons might not function or even stay in their down position. Soldering the terminals, and putting the button back into place is typically all that's needed to return the key fob that is not working to functioning condition. Non-Remote Transponder Chips The non-remote chips that are sealed are more durable than their remote fobs, but they are susceptible to breaking if a hole is drilled into them or if a car door handle or lawnmowers plows over them. The failure of the fuse is usually the cause of non-remote chip failures. If you're not confident opening the key fob, take the circuit board off and use a multimeter to determine if the diode is functioning correctly. If you're not sure with this, you can go to your local Oreilly or hardware store and use their RF frequency tester. This will inform you whether the key fob transmits signals. Programming Key fobs aren't indestructible and are susceptible to being damaged by a variety of factors. They can lose their pairing to the car's receiver due to shock or low battery, which requires them to be reprogrammed. car key repairs near me , or main dealer can reprogram your keyfob and get it functioning again. If resetting or fixing the keyfob is not working, you may need to replace it.