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How to Fix a Key Fob That isn't Working If your key fob isn't functioning There are a few simple steps that can fix it. The first step is to be sure that it's not your backup remote. If the backup can lock and unlock your car doors, then there is likely an issue with the primary remote. The most frequent causes of key malfunctions for car remotes are issues with the circuitry or battery. Battery The battery inside the key fob could get worn out over the course of time. It is easy to replace batteries. However it is essential to select the right type. You can check your owner's manual or call the manufacturer to find out the right type. It is also essential to inspect the battery compartment, since dead batteries can leak caustic chemicals that can harm the remote. If replacing the battery does not fix the issue there could be other issues requiring professional attention. For instance, if buttons seem stuck or broken it could be necessary to take the remote apart and rework its parts. You could also try reprogramming the vehicle to recognize the new fob. Buttons Key fobs can become filthy and worn out due to repeated use. This is not atypical however it can cause buttons to cease working or require a very difficult press to get them to function. This can be extremely frustrating, especially if you are away from home and need to start your car. Fortunately, even worn-out or malfunctioning buttons can often be fixed with just a bit of time and a few materials you have in the home. First, check that the batteries are properly installed and that the indentation on the back of the button has been filled. Then, carefully open the remote and inspect the circuit board. Look for signs of corrosion or other indications that the buttons are worn or damaged, such as missing the conductive paint. Use a Q-tip, dipped in alcohol to gently clean any membrane contact that has become worn out or where conductive paint is missing. Avoid rubbing electronic key repair near me , since this could cause damage to the conductive paint and block the button firing when the button is pressed. Examine the battery connector's terminals carefully for any loose solder connections. Soldering them back into place will restore the button's functionality if this is the case. The same procedure can be used to restore functionality to any other loose connections in the fob. If any of the rubber buttons located at the front of the keyfob aren't working or need to be pressed very hard the graphite disks on the back of the button might have worn out and will need to replaced. This can be done by rubbing a pencil across the disks, which 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 could be that the circuitry is failing. It is possible to fix the issue by cleaning and re-soldering your fob, but you should have an extra in case it does not work. Circuitry If the keys fob buttons are functioning the circuit board that is inside your remote might be dirty. A thorough examination is usually enough to fix this problem. Broken cases and water are the most common causes of dirty boards. A broken case can allow water and other debris into the circuit board, which can cause it to short. Water can also damage pins and connectors that are small on the board called via's. If you're able to open your key fob and aren't afraid of some mess, we can de-solder the buttons and put new ones in their place. It's also worth looking at the battery terminal connections. They can become very filthy and if they're not tight enough, the buttons might not function or even stick in their down position. Soldering the terminals and button's back in their place is generally all that's required to return the key fob that is not working to working condition. Non-Remote transponder chips The non-remote chips sealed in a sealed case are more durable than remote fobs, but they are susceptible to cracking if a hole is drilled in them or if a car door handle or lawnmower runs over them. Most of the time, non-remote transponder chip malfunctions can be attributed to blowing fuses. If you're handy enough to open up a key fob that is sealed and are able to bear the mess, you can remove the circuit board and examine the fuse with a multimeter for proper diode function. If you're unsure about doing this, go to your local hardware store or the Oreilly's and they usually have a RFID frequency tester that can tell you whether the key fob sending a signal. Programming Key fobs aren't indestructible and are susceptible to damage by a lot of things. They may lose their connection to the receiver in your car due to shock or low battery, which requires them to be reprogrammed. A professional auto locksmith or the main dealer can reprogram the keyfob to get it up and running again. If, in the unlikely event that resetting or repairing your key fob isn't working it may be time to replace it entirely.