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How to Repair a Remote Key Although most remote key fobs are equipped with amazing battery lives, they'll eventually get worn out. Some times it is as simple as changing the batteries inside the device, but in other cases the issue can be more serious. Take apart remote key repair and clean the buttons. Then bend them in and out. These steps could be all you need to get the key fob working. Battery If the fob is still working you can replace the CR2025 or CR2032 battery. If it isn't, you can open the fob and inspect the battery terminals and buttons for any signs of looseness or broken parts. You should be able to solder the buttons and terminals back in place. However, you'll be required to know which type of battery is used in the fob. If you're unsure whether the battery is the problem you can make use of a backup fob to unlock or start your vehicle. If it's possible then it's time to replace the primary fob. If it's not, a professional inspection is necessary to determine the reason it's not functioning properly. It could be as simple as reprogramming it, or require other repairs. You may also find that your vehicle has lost the fob. This is not something you can fix on your own. Case Study The case of remote keys is the outer plastic housing and typically comes with a button pad that is replaced. It is crucial to get a new case as the original will probably be quite dirty and it is crucial that the circuit board is installed correctly inside the case. The circuit board is responsible for controlling the function of the key fob. You can test it using an instrument set to RF (radiofrequency) mode and a radio scanner that is tuned to the same frequency as the key fob. Another thing to look at is the button contact points on the keypad. These might have become loose or broken in the course of time. Soldering them back to their original position will often allow them to return to their original functionality, unless they snap completely. Buttons If the buttons on your key fob aren't working or are difficult to push, you can buy a replacement dorman or Motormite remote key housing online for a low cost for the model/year/make. Then, take the circuit board from your old case and into the new one. On some models you may have to move the board slightly. The black contact points of buttons can be adhered to with aluminum foil and double-sided tape. Programming The key fob is connected with the receiver inside your vehicle and this connection can become corrupted. A professional will inspect your car to determine its year, make, and model. They'll then use specialist equipment to recouple or program a blank transponder chip or fob (or copy the key if that is possible). They will then test the remote to confirm that it functions. When programming blank keys it is essential to be careful. The process is complicated and each manufacturer comes with different instructions. It is easy to miss a crucial step or wait too long to exit the programming mode. To reduce the chance of causing damage to your vehicle it is recommended to employ an expert who has extensive knowledge of the security system in your vehicle. Certain programming tools that are essential to use can also identify diagnostic trouble codes on your vehicle. This can assist you to solve other issues.