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How to Fix a Key Fob That isn't Working If your key fob isn't working A few easy steps can be taken to fix it. The first step is to be sure that it's not your backup remote. If the backup remote is able to lock and unlock your car door, then there is likely an issue with the primary remote. The most common causes of key malfunctions for car remotes are battery or circuitry issues. Battery The battery inside the key fob may be worn out over time. It is easy to replace batteries. However it is crucial to select the right kind. You can check your owner's guide or contact the manufacturer to inquire about the correct type. It is also crucial to examine the battery compartment, since batteries that are not working properly can release toxic chemicals that could damage the remote. If changing the battery doesn't fix the issue, there may be other issues requiring professional attention. If the buttons are broken or stuck for instance, it may be necessary remove the remote and rebuild each component. You could also try reprogramming your car to recognize the new key fob. Buttons Key fobs can become dirty and worn-out from frequent use. This is not uncommon, but it can cause buttons to stop working or require a very difficult press to get them to function. This can be frustrating, especially when you are away from your home and you need to turn on your car. Even broken or damaged buttons are often fixable with a little time and materials you already have at home. First, make sure that the batteries have been correctly installed and that the indentation on the back of the button is filled. Open the remote carefully and look over the circuit board. nearby key repair shop for signs of rust or other indications that the buttons have been worn or damaged. For example the paint that conducts electricity could be missing. Use the Q-tip, dipped in alcohol to gently clean any membrane contacts that have damaged or have conductive paint missing. Avoid rubbing too hard since this could cause damage to the conductive paint and block the button firing when it is pressed. Also, carefully check the battery connector terminals for an unattached solder connection. Soldering them back to their original position will allow the button to function again in the event that this is the case. The same procedure can be used to restore function to any loose connections inside the fob. If any of the rubber buttons on the front of the keyfob aren't functioning or require to be pressed very hard the graphite disks on the back of the button may have worn out and require replacement. You can do this by rubbing a pencil over the disks. This should bring the button to life. If none of these solutions work or you not be able to get the button respond when you press it hard, it could be that the circuitry is failing. This can be fixed by a quick clean, and re-soldering, but it is ideal to have a spare fob in case this method does not work for you. Circuitry If the keys fob buttons are functioning the circuit board in your remote might be dirty. The issue can be solved through a thorough examination. The most frequent causes of dirty circuit boards are water and broken cases. A damaged case could allow water and other debris into the circuit board, which can cause it to short out. Water can also get through pins and vias, which are small connectors that are found on the board. If you're able to remove your key fob, and you're not afraid of some mess, we can remove the solder from the buttons and solder new ones in their place. It's also worth checking the battery terminal connections. They can become very filthy and if they're not tight enough, the buttons might not function or even stay in their down position. Soldering nearby key repair shop and button's back in their place is generally all that's required to return the key fob that is not working to functioning condition. Non-Remote Transponder Chips The sealed non-remote chips are more durable than remote fobs. However, they are susceptible to cracking in the event of a hole being drilled in them or if a car door handle or lawnmowers is pushed over them. Fuse failures are usually to blame for non-remote chips failures. If you're not confident opening the key fob, you can remove the circuitboard and utilize a multimeter to verify that the diode is functioning correctly. If you're unsure about doing this, head to your local hardware store or the Oreilly's and they'll usually have a RFID frequency tester that can tell you whether the key fob sending signals. Programming Key fobs take lots of abuse and aren't impervious to damage. They may lose their connection to the receiver in your car because of shock or a low battery, which calls for them to be reprogrammed. A professional auto locksmith or a main dealer can reprogram your key fob and get it back up and running. If, in the unlikely event that resetting or repairing your key fob doesn't work it could be the time to replace it all over again.