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How to Repair a Remote Key Although most remote key fobs come with amazing battery lives, they will eventually wear out. Sometimes it's simple to replace the batteries inside the device but sometimes the issue could be more serious. Remove the remote from the unit and clean the buttons. Then bend them out and in. These techniques might be all you need to get your key fob working. Battery If the fob is still functioning it is possible to swap out the CR2025 or CR2032 battery. If not, look at the battery terminals and buttons to determine if they are any parts that are loose. website is usually possible to solder the terminals and buttons back into place. However, you will be required to know which type of battery is used in the fob. If the battery isn't the problem, try using an alternative key fob and see whether you can unlock or start your car with it. If you can then it's time to replace your primary fob. If it's not, a professional inspection is necessary to determine the reason it's not working properly. It could be as easy as reprogramming, or it could require other types of repair. There's also the possibility that your vehicle lost your fob, which isn't something you can fix on your own. Case Study The case of remote keys is the plastic housing that covers the outside and typically comes with the button pad that is replaced. It is important to use a new case as the original one is likely to be pretty grungy and it is crucial that the circuit board is set correctly in the case. The circuit board is the main component of the key fob. It can be tested with a normal multimeter by setting it to the RF (radio frequency) mode and holding a radio scanner tuned to the same frequency the key fob operates on next to it, watching for pulsing signals upon pressing the button. Examine the contact points of the buttons on the keypad. They could be loose over time or broken. Soldering them back in place can often restore them to full function, except if they break completely. Buttons If your key fob buttons are no longer working or are difficult to push, you can buy a new dorman or motormite remote key housing online for the lowest price for your model/year/make. Then, take the circuit board out of your old case and put it into the new one. In some cases you may have to move the board slightly. The black contact points of the buttons can be bonded to aluminum foil using double-sided tape. Programming The key fob and receiver in your car are paired however, this connection may be damaged. A professional will inspect your vehicle to determine its year, make and model. They will then use special equipment to reconnect or program the transponder chip with a blank fob (or clone the key if possible). Then they will test the remote to make sure that it works. When reprogramming keys that are blank, it is important to take care. The process can be complicated and each manufacturer offers slightly different instructions. car key repair company is also possible to skip a step or wait too long before exiting the programming mode, so it is best to use a professional with comprehensive knowledge of the security system of your vehicle to minimize the risk of damaging the car. Certain programming tools that are essential to use can also detect diagnostic trouble codes in your vehicle. This will help you fix or resolve other issues.