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Car Remote Key Repair Modern car remote keys are very useful and convenient, however they can be frustrating when they stop functioning. There are some quick solutions to get them working again. Replace the battery first. Most fobs use lithium coin cells, which are affordable and readily available. Broken Electronics The electronic circuit board inside the remote car key transmits and interprets signals for your vehicle. If the circuit board is damaged, the key fob will not work correctly. Damage to the receiver or transmitter will require a professional auto-locksmith or your car dealer. The majority of remote key fobs are powered by a lithium ion coin batteries, which have a long shelf life. However they will not last forever. Changing the batteries will likely solve your problem, especially when they've been in use for a while. You may be surprised if you've been using your remote for a while and the buttons aren't responding in any way. This is true even when the batteries are brand new. The buttons on your keyfob are subjected to a lot of jostling and can break or become unresponsive with time. In this case, removing and cleaning the buttons can fix the problem. If your remote's buttons aren't working, you might have to re-program it to match the system in your vehicle. This is typically accomplished by turning the key in the ignition several times while the doors are shut. This will depend on the model and make of your vehicle, however you can find instructions online or seek professional help. If the key fob is made of an exterior made of plastic it is possible to take off the cover and pry it apart. Be careful not to damage buttons or other internal components. This is best done with a pair needle-nosed pliers that have longer tips. They are able to easily grasp small components. Lubricating pliers using putty, super glue or melted tallow can aid in grabbing delicate components. It's also a good idea to have an automotive locksmith do this, as improper methods could damage the electronic components inside. Trying to forcefully pry the fob apart could damage the plastic, and it's also possible to accidentally break the buttons that are attached to it. Faulty Transponder Chip If you've been able start your car using the remote key, but it's not working ever again, it could be a sign of that there is a problem with your transponder chip. This is because the key relies on the tiny electronic component to communicate with the immobilizer system. It transmits a signal to the system that your key is legitimate and that you should be in a position to start the engine. If the chip isn't able to transmit this signal, the immobilizer will disable the vehicle. This issue is most common in older vehicles However, it can occur in newer ones too. This is due to the transponder chip may wear out over time. how to repair car key fob can be replaced by a locksmith for cars, but it is expensive. In some instances the chip inside your key could be dead. In this situation the dealer will have to replace it. This is the most costly but necessary option to get your car back on the road. The other possibility is that the chip inside the key has become damaged that means it no longer communicates properly with the immobilizer system. This can happen if the battery is replaced or if the key has been physically damaged. A Mesa auto locksmith can solve this problem, but you may need to go to the dealership to have your key programmed. If you're having problems with your remote key, the first thing you should do is to create a backup. If this doesn't solve the issue, take apart the key fob and perform an inspection. Make sure that no buttons are loose or damaged. These parts are often used and can become loose over time. If they're loose it's recommended to have them reattached by an expert. In a lot of instances, this will restore your key fob's functionality. This is particularly applicable to keys that were accidentally put in the wrong ignition lock cylinder. Damaged Battery If you've tried a brand new battery but the key fob still won't work, there may be other issues. Fobs can be damaged by dropping them or stepping on them, and the internal connections, such as those that connect the battery terminals within the remote, may also be damaged or disconnected. It is possible to reprogramme your key fob if don't have a replacement of the same model and type. Modern key fobs need to be programmed to match the car to ensure that only you are able to unlock the car's doors. It's a crucial step to safeguard your vehicle and keep others from using your key fob to access your vehicle or cause problems with the electrical system. Certain engine error codes, or even normal wear and tear can alter the programming and prevent your key fob from functioning. Professionals with the right equipment can reprogramme your key fob properly. It's possible that the issue is with the buttons, which is a much easier fix than replacing the entire key fob. Key fobs typically have rubberized buttons that are jostled around all the time, and may break or loosen. If you see that the buttons do not appear to be damaged, you may want to adjust them manually. It's best to open up the key fob and take a look at it, but be careful. Certain key fobs don't have an easy release mechanism. You may require a screwdriver or small tool to pry them apart. Some are sealed and cannot be opened with the use of specialized tools. You'll likely need to bring it to a dealer to have it opened professionally. You can use a spare keyfob that is the same model and make to access the programming mode of your vehicle. Depending on your car, this may involve closing and locking the doors, switching lights and electronic devices on and off by pressing a particular set of buttons in a specific order. Failing Buttons If your key fob has buttons that do not function or require to be pressing very hard in order to perform it could be because of mechanical damage. The key fob being dropped on concrete or accidentally hitting a button with a sharp object may alter the way it works. You'll have to dismantle the key fob and look over it to determine whether there are any buttons that look damaged. If this is the situation, a locksmith will fix it for you. Dirt and crud can cause buttons to fail. Clean your key fob using a cotton swab that has been submerged in alcohol. It is also possible to clean the surfaces of the keys. You should also determine if the issue lies related to your car lock or the key fob. If you don't own an extra key, try using the keys of a different vehicle to see if it works. The condition of the battery will also determine if you need to change the programming of the key fob. If your key fob fails to function after replacing the batteries, it probably means that the battery terminal contacts are damaged. Pressing the buttons on your key fob too many times while you're out of range or disconnecting your car battery could also deprogram an electric key fob. If the key fob not working after replacing the battery, you should get it reprogrammed with your car. This will depend on the particular vehicle model however, generally you'll need to manually lock and unlock the car's doors by inserting the key fob into the ignition, rotate it to the accessory position, and then push a button on the remote. Usually the interior and exterior lights will flash if this has worked. It is possible to test the key fob to confirm that it has been successfully programmed. In more rare cases keys can stop working if there is an issue with the door locks themselves.