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Car Key Button Repair The buttons on the car keys are exposed to a lot particularly if they are frequently used. This could lead to them becoming faulty over time. Fortunately, there are several quick solutions to make your keys work again. However, these methods have risks associated with changing batteries or tampering with your key fob. If you're not confident with these methods, it is recommended to seek advice from an expert auto-locksmith. Change the Battery If you notice that your key fob not functioning as it should, it could be time to replace the battery. You can buy replacement batteries at any chain drugstore nationwide or in the parts department of your local dealership for cars. Some manufacturers include an extra battery with your vehicle when you purchase it. broken key repair is first necessary to determine the kind of battery is used in your key fob. This information is usually available on the site of the manufacturer or by examining the key fob. Generally speaking, the most popular battery that is used in the key fob is a button cell type, similar to those used in remote controls and watches. These kinds of batteries are typically available at stores like Walgreens and Energizer and are available for purchase for under $5 for a set of two. If you are aware of the type of battery your key fob uses, you can open it and remove the old battery. It is possible to open most key fobs using your fingers or a flat tool, like a screwdriver, at the seam or notch where they join. Once the key fob has been opened the battery will pop out. Then, you can replace it with the same design. Most key fobs use CR2032 3V batteries, which are easily available at numerous retailers that sell AAA and AA batteries. After the new battery has been installed after which you can snap the two halves of the key fob together and test it to make sure that all buttons function properly. Pressing the locks and unlock buttons on the key fob while pointing it at your vehicle will allow you to determine if everything is functioning in the way it should. If your vehicle is still not responding to the key fob, it might be necessary to reprogram the key fob and establish an electronic connection between the two. This is a easy process that requires a phone or other device. Reprogram your key fob If your key fob does not function and you believe it's time to replace it It may not require the replacement of a battery, but instead the old one needs to be reprogrammed. This procedure is different for every car, so your best bet is to refer to the owner's manual (usually available in PDF form on the site of the automaker) or look on YouTube for videos explaining how to go about this. In modern vehicles, a specific procedure is required to put the vehicle in “programming mode”. This typically involves pressing the power button multiple times on the door of the driver or ignition while simultaneously pressing a button on a fob in a time-specific period. This is how the fob communicates its digital identity code to the vehicle, and it stores it in memory. After the fob is programmed, it will function like an ordinary key. Reprogramming a fob will erase any previous keyfobs. If you wish to keep the other fobs following the first, they must be reprogrammed quickly and carefully. There are a few replacement batteries for your car key fob in hardware stores, big-box retailers, or online. However, you must be aware of the make and model of your car prior to purchasing a fob battery because the correct type of battery can be tricky to find. A CR editor found an battery for her key fob, but it was from an entirely different vehicle. This meant that she could start her car and unlock the door, but she couldn't lower the windows. Dealers can be a great resource in this regard, since they have the tools to reprogram the fob for a specific vehicle. Dealers are required to carry out this service on some European automobiles like Audi and BMW due to their unique security features which can only be reset at the factory. Other dealers we spoke with like those at Toyota and Lexus were willing to try reprogramming an original fob so provided you know the exact model and make of your car. Replace the Button If you've tried changing the battery, reprogramming your key fob and still can't start your car it might be time to replace the button on your key. The button on the key of your car is subject to a lot use and jolting and may be damaged or stuck over time. Each time you press the button on your car key fob generates a unique code in a sequence that is recognized by the receiver inside the vehicle. Trying to operate your car from a distance and not using the correct code can cause it to not be able to recognize you and then lock the doors or shut off the engine. You can purchase replacement buttons online or at several local hardware stores. They are relatively simple to install and open and require only a small amount of clear plastic tape to cover the button. Contact an Auto Locksmith It may be time to consult the experts if you are experiencing problems with your car's key button. Auto locksmiths are experts in the repair of electronic keys and locks. They have the expertise and tools necessary to diagnose and fix a range of issues with your key fob including replacing batteries and changing their programming. They also have the knowledge and expertise to tackle more complicated jobs such as fixing damaged buttons or cutting a replacement key. The switch inside the button for the car key is typically worn out. This is due to overuse and exposure to elements. The switch is constructed of an extremely hard plastic with several switches on its surface. Each of these switches activates the function for which you are using the key. As the switch gets older over time, it becomes harder to activate these functions. As a result, you'll need to push down more force on the switch to make it work. This could cause further damage to the switch and reduce its lifespan. Replace the battery in your key fob. Many models of car use lithium-ion coin or button batteries, which you can easily find in supermarkets, pharmacies, and home improvement stores. Your key fob should now be working after replacing the battery. If the problem persists, it could be that the contacts on your key fob have become worn out. The contacts are rubber-like and coated with an electricity conducting film, which could wear down over time. They are exposed to elements when you use the keypad which means they are constantly exposed to dirt and moisture. They will eventually wear to the point where they can no longer make contact with the circuit board or the sensor under the keypad. The dealership can replace your key fob, however it could be costly and take a long time. The other option is to contact a local car locksmith who will be able to fix your key fob and save you money.