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How to Fix a Key Fob That isn't Working If your key fob does not work and you're not sure why, you can fix it with just a few steps. The first step is to make sure it's not the backup remote. If your backup remote can lock and unlock the doors of your car, then it is likely that the main remote isn't working. Most car remote key failures are caused by circuitry or battery issues. Battery The battery in a key fob can get worn out over the course of time. It is quite simple to replace the battery, however it is crucial to ensure you use the right type and you can consult your owner's manual or contact the dealer of the manufacturer to find out the kind of battery you require. It is also crucial to check the battery compartment, since batteries that are not working properly can release caustic chemicals which can damage the remote. If replacing the battery does not fix the problem there may be additional issues that require attention from a professional. If the buttons are broken or stuck for instance it could be necessary to take the remote apart and rework each component. You can also try reprogramming your vehicle to recognize the new key fob. Buttons Due to repeated use, key fobs can become worn and dirty. It is not unusual for buttons to stop functioning, or require a hard press to get them working. This can be frustrating, especially when you are away from home and have to start your car. Fortunately, even worn-out or malfunctioning buttons can often be fixed with a bit of time and some of the materials you might already have in the home. First, make sure the batteries are charged correctly and that the indentation on the back of the button is filled. Then, carefully open up the remote and inspect the circuit board. Examine for signs of rust or other signs that the buttons are worn or damaged, such as missing paint that is conductive. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contact that has become worn out or has conductive paint missing. Do not rub too vigorously, as this could erode the conductive paint and prevent the button from firing when you press it. Check the battery connector's terminals carefully for any loose solder connections. Soldering them back to their original position will restore the button's functionality in the event that this is the situation. The same process can be used to restore functionality to any other loose connections within the fob. If any of the rubber buttons at the front of the keyfob isn't working or need to be press extremely hard the graphite disks on the back of the button may have worn out and will require replacement. This can usually be done by rubbing a pencil over the disks. This should bring the button back to its original state. If none of these solutions work, or if you still are unable to get the button to respond when you press it hard, it could be that the circuitry is failing. It is possible to fix this by cleaning and re-soldering your fob but you should also have a spare in case it doesn't work. Circuitry The circuit board of your remote control may be dirty regardless of whether the buttons on the key fob work or not. This issue can be fixed by a thorough inspection. Water and broken cases are the most frequent causes of dirty boards. A broken case can let water and other debris to enter the circuit board, which can cause it to short. Water can also damage pins and connectors on the board called via's. If you're able to remove your key fob, and you're not afraid of some mess, we can take off the buttons and put new ones in their place. It's also worth examining the battery terminal connections. They can become very dirty and if they're loose the buttons might not work or even stick in their down position. Soldering terminals and buttons back into place is usually enough to restore a non-working fob to a working condition. Non-Remote Transponder Chips Sealed non-remote transponder chip are more durable than remote fobs they are contained in, but they can be damaged by a hole that is made in them or pushed over by a lawnmowers blade or door handle for a car. Fuse failures are usually to blame for non-remote chip failures. If you're able to remove a key fob that is sealed and can tolerate the mess, you can easily remove the circuit board and check the fuse with a multimeter for proper diode function. If you're not comfortable doing this, visit your local hardware store or Oreilly's, and they usually have an RFID frequency tester that can let you know whether the key fob is transmitting a signal. Programming Key fobs aren't indestructible and are susceptible to damage by a variety of factors. They can lose their pairing to the car's receiver because of shock or a low battery, which requires the reprogramming. A professional auto locksmith or main dealer will be able to reprogram your key fob to get it functioning again. If resetting or replacing car key repair shop near me is not working it may be necessary to replace it.