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How to Repair a Remote Key Even though most remote key fobs boast impressive battery lifespan, they eventually degrade. Sometimes it's as simple as changing the batteries, but sometimes there are more serious problems. Take the remote apart and clean the buttons. Then move them out and in. These steps could be all that you require to get your key fob working properly. Battery If the fob continues to working, you can swap out the CR2025 or CR2032 battery. If it's not, you can open the fob and check the battery terminals and buttons for any indication of looseness or broken parts. Often the terminals and buttons can be soldered back in place but you'll need be aware of the kind of battery your fob uses. If you're not sure whether the battery is the problem then utilize a backup fob in order to start or unlock your vehicle. If you can, it's probably time to replace the primary fob. If not, a professional inspection is required to determine why it's not functioning properly. It could be as simple as reprogramming, or it could require other types of repairs. There's also the possibility that your vehicle has forgotten your fob, which isn't something you can fix on your own. Case The plastic housing that covers the outside of a remote is known as the case. It usually comes with a replacement button pad. It is recommended to use a brand new case, since the original one case is likely to be quite grungy. Also, it is essential that the circuit board within the case is properly positioned. The circuit board is the main component of the key fob and is tested using a normal multimeter by setting it to RF (radio frequency) mode and holding a radio scanner tuned to the frequency the key fob operates on next to it, watching for signals that pulsate upon button presses. Another thing to examine is the contact points for buttons on the keypad. These may be loose or damaged in the course of time. Carefully soldering them back in place can often return them to full functionality unless they completely snap off. Buttons If the buttons on your key fob aren't working or are difficult to push, you can purchase a new dorman or motormite remote key housing online for the lowest cost for the model/year/make. Then, pop the circuit board from your old case and into the new one. In broken car key repair may be necessary to move the board slightly. Then, you can use aluminum foil using double-sided tape to adhere to the black contact points on the buttons. Programming The key fob is paired with the receiver inside your vehicle, and this connection could be damaged. A professional will examine the vehicle to determine the make model, year and model. They will employ specialist equipment to re-pair or program the fob with a blank transponder chip (or duplicate a key in the event that it is possible). Then, they test the remote to be sure it works. When programming blank keys, it is important to be careful. The process can be complicated and each manufacturer offers slightly different instructions. It is easy to miss a key step or to wait too long before exiting the programming mode. To minimize the risk of causing damage to your vehicle it is recommended to employ an expert with extensive knowledge of the security system of your vehicle. Certain key programming tools can also be capable of reading diagnostic trouble codes from your vehicle, which could help repair or troubleshoot further problems.