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How to Repair a Remote Key While the majority of remote key fobs come with amazing battery lives, they'll eventually run out of battery. Some times it is as simple as replacing the batteries inside the device, but in other cases the problem can be more serious. A quick fix that can aid is to disassemble the remote and cleaning the buttons before stretching them out and in. These techniques might be all you need to get your key fob to work. Battery Car key remotes use CR2025 or CR2032 batteries and they can be swapped out in the event that the device is functioning. If not, you can look at the battery terminals and buttons to determine if they are any loose parts. Often the terminals and buttons can be re-soldered back into place however you'll need be aware of the exact kind of battery is used by your fob. If you're unsure whether the battery is at fault, use a backup fob to start or unlock your car. If you're able to do so, it's probably time to replace your primary fob. If not, a professional inspection is needed to figure out why it's not working properly. It could be a simple reconfiguration, or it may require other types of repair. There's also the possibility that your vehicle lost your fob and isn't something you can fix yourself. Case Study The case of remote keys is the plastic housing that covers the outside and typically comes with a button pad replacement. It is recommended to purchase the latest case because the one you have case is likely to be quite grungy. 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 and is tested using a standard multimeter by setting it to the RF (radio frequency) mode and holding a scanner tuned to the frequency the key fob uses next to it, watching for signals that pulsate upon button presses. Another thing to check is the contact points for buttons on the keypad. These could have become loose or broken over time. A careful soldering process to put them back in their original position can usually restore them to full functionality unless they completely snap off. Buttons If your key fob buttons aren't working or are difficult to push, you can purchase a new dorman or motormite remote key housing online for a low price for your model/year/make. Then, take the circuit board out of your old case and put it into the new one. It is possible to adjust the position of the circuit board on certain models. key repair car of the buttons can be bonded to with aluminum foil and double-sided tape. Programming The key fob is linked with the receiver of your vehicle and this connection can be corrupted. A professional will inspect your car to determine the year, make and model. They will then use specialist equipment to reconnect or program an unmodified transponder chip or fob (or clone the key, if possible). Then, they test the remote to be sure that it works. When reprogramming keys that are blank it is crucial to take care. The process can be complex and each manufacturer has different instructions. It is also easy to skip a step or delay too long before leaving the programming mode, therefore it is recommended to hire a professional with comprehensive knowledge of your car's security system to minimize the risk of harming the car. Certain programming tools are also capable of reading diagnostic trouble codes from your vehicle, which can assist in fixing or resolving any further problems.