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How to Repair a Remote Key Although most remote key fobs boast impressive battery life, they do eventually degrade. Sometimes it's as simple as changing the batteries, however sometimes there are more serious issues. Remove the remote from the unit and clean the buttons. Then move them in and out. These steps could be all you need to get the key fob to work. Battery If the fob is still functioning it is possible to swap out the CR2025 or CR2032 battery. If it's not accessible, you can take it off the fob and inspect the buttons and battery terminals for any signs of looseness or damaged parts. Most of the time, the buttons and terminals can be re-soldered back into place, but you'll need to be aware of the exact kind of battery your fob uses. If you're not sure if the battery is at fault, make use of a backup fob to start or unlock your vehicle. If you can, then it's time to replace your primary fob. If not, a professional check is needed to figure out why it's not working properly. It could be as simple as reprogramming or it may require other types of repair. You may also find that your vehicle has forgotten the fob. This isn't something you can fix on your own. Case Study The case of a remote key is the plastic case that surrounds it and typically comes with the replacement button pad. It is recommended to use a brand new case, since the original one case is likely to be quite filthy. Additionally, it is essential that the circuit board in the case is placed correctly. The circuit board is responsible for the operation of the key fob. It can be tested with a standard multimeter by setting it to the RF (radio frequency) mode and holding a scanner tuned to the frequency the key fob is using close to it, and listening for pulsing signals upon the button's presses. Check car remote key repair on the keys on the keypad. They may be loose over time or broken. Soldering them back into place will often allow them to return to full functionality, except if they snap completely. Buttons If your key fob buttons don't work anymore or are difficult to press, a dorman or motormite key housing replacement for your remote can be bought inexpensively online for your year/make and model. Then pop the circuit board from your old case into the new one. You may have to slightly adjust the position of your circuit board on certain models. The black contact points of buttons can be adhered to using aluminum foil and double-sided tape. Programming The key fob and receiver inside your car are paired however, this connection may be damaged. A professional will assess your vehicle to determine its make, year, and model. They will then employ specialist equipment to reconnect or program the transponder chip with a blank fob (or duplicate the key if that is possible). They will then test the remote to ensure that it works. It is essential to be careful when reprogramming the blank key, because the process can be complicated and different brands require certain steps that are slightly different. It is also easy to miss a step, or delay too long before leaving the programming mode, which is why it is recommended to work with a professional with comprehensive knowledge of the security system of your vehicle to minimize the risk of damaging the car. Some key programming tools also have the capability of analyzing diagnostic trouble codes from your vehicle, which can help repair or troubleshoot further problems.