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How to Repair car key fob repairs Although many remote key fobs boast impressive battery life, they do eventually get worn out. key fob repairs is as simple as replacing the batteries in the device but sometimes the issue could be more serious. Take apart the remote and clean the buttons. Then bend them out and in. These steps could be all you need to get your key fob working. Battery If the fob is functioning it is possible to swap out the CR2025 or CR2032 battery. If not, you can look at the battery terminals and buttons to determine if there are any loose parts. The terminals and buttons can be re-soldered back into place however you'll need be aware of the kind of battery is used by your fob. If the battery isn't the problem you can try an alternate key fob to see if you can unlock or start your vehicle with it. If you're able to do so, it's probably time to replace the primary fob. If not, you will need to have a professional inspect it to determine the problem. It could be as simple as reset, or it could require other types repair. You might also discover that your vehicle has forgotten the fob. This isn't something you can do on your own. Case The outer plastic enclosure of a remote is called the case. It is usually equipped with a replacement button pad. It is recommended to use the latest case as the original case is likely to be quite grungy. Also, it is vital that the circuit board in the case is placed correctly. The circuit board controls the key fob's function. You can test it using an instrument set to RF (radiofrequency) mode and a scanner that is tuned to the same frequency as the key fob. Another thing to check is the contact points for buttons on the keypad. These could be loose or damaged in the course of time. By carefully re-soldering them back into place will often restore the functionality of the keypad unless they completely snap off. Buttons IF your key fob buttons do not function anymore or are difficult to press you may need a dorman or motormite key housing replacement for your remote can be bought inexpensively online for your year/make and model. Then, take the circuit board out of the old case and insert it into the new one. It is possible to adjust the position of the board on some models. The black contact points of the buttons can be adhered to aluminum foil using double-sided tape. Programming The key fob is paired with the receiver in your vehicle and this connection can be corrupted. A professional will assess the car to determine the make, year and model and employ specialist equipment to re-pair or program an empty fob or transponder chip (or duplicate a key should this be possible). Then they will test the remote to be sure it works. When reprogramming keys that are blank, it is important to take care. The process is complex and each manufacturer has different instructions. It is easy to miss a crucial step or to 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 vast knowledge of the security system of your vehicle. Certain programming tools can also be capable of reading diagnostic trouble codes from your vehicle. This can help repair or troubleshoot additional issues.