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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 by following some simple steps. The first step is to make sure that it's not your backup remote. If car key fob repairs near me is able to lock and unlock your car doors, then there's a likely issue with the primary remote. The most common causes for key malfunctions for car remotes are battery or circuitry issues. Battery It is not unusual for the battery inside the key fob for cars to wear out. It is fairly easy to change out the battery, however it is important to ensure that you choose the correct type that you can refer to your owner's manual or contact the dealer for the manufacturer to find out what kind of battery you require. It's also a good idea to examine the battery compartment thoroughly because dead batteries can leak caustic chemicals that can damage the remote. If changing the batteries doesn't solve the issue it could be that there are other issues that require professional attention. For example, if buttons appear stuck or broken It may be necessary to take the remote apart and rework its parts. You could also try reprogramming the vehicle to recognize the new remote. Buttons Key fobs can get dirty and worn-out from repeated use. It is not unusual to have buttons stop working, or to require a hard press to make them work. This can be frustrating, especially when you are away from your home and you need to start your car. Even worn-out or malfunctioning buttons are often fixable with a little time and tools you already have at home. First, make sure the batteries are properly charged and that the indentation on the back of the button is filled. Then, open the remote with care and inspect the circuit board. Examine for signs of rust or other indications that the buttons are worn out or damaged, like missing the conductive paint. Use the Q-tip, dipped in alcohol, gently clean any membrane contacts that have become damaged or have conductive paint missing. Do not rub too vigorously, as this could erode the conductive paint, and block the button from firing when you press it. Check the battery connector terminals for loose solder connections. If this is the case, connecting them back may restore functionality to the button. You can use the same method to restore functionality to any other loose connection inside the fob. In the end, if any of the buttons made of rubber that are on the front of the key fob aren't working or require a very difficult press to function it is likely the graphite disks on the back of the button are wearing out and need to be replaced. It is usually done by rubbing a pen across the disks. This should bring the button to life. If all of this doesn't help or if the button still does not respond to a firm press It could be because the circuit board itself has become damaged. This can be fixed with a quick clean and refitting, but it's best to have an extra fob available in the event this method fails for you. Circuitry The circuit board in your remote control could be dirty regardless of whether the buttons on the key fob work or not. A thorough inspection will usually resolve this issue. The most common causes of dirty circuit boards are water and damaged cases. A damaged case allows water and other debris to pass through and short circuit the electronics. Water can also damage pins and vias, which are tiny connectors found on the board. If you're skilled enough to open your key fob and aren't afraid of making an mess, you can take the buttons out of their sockets and put in new ones. Also, you should check the connections between battery terminals. If they are loose, the buttons might not work or even become stuck in their down position. Soldering the terminals and buttons back in their place is generally all it takes to restore a non-working key fob to working condition. Non-Remote Transponder Chips Sealed non-remote transponder chips are much more durable than remote fobs that contain them but they can still be damaged by a hole that is drilled into them or run 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 blowing fuses. If you're able to open the sealed key fob and are able to bear the mess, you can take off the circuit board and examine the fuse using an instrument to verify diode function. If you're not sure with this, you can visit your local Oreilly or hardware store and utilize their RF frequency tester. This will let you know whether the key fob is sending signals. Programming Key fobs endure a lot of abuse and aren't completely indestructible. They may lose their connection to the car's receiver due to shock or a low battery, requiring the reprogramming. A professional auto locksmith or dealer will be able to reprogram your key fob and get it working again. If, in the unlikely event that resetting and fixing your key fob doesn't work, it could be time to replace it entirely.