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Car Key Button Repair Car key buttons endure lots of abuse particularly when they are used regularly. In time, they could become faulty. There are a few quick fixes that will allow your keys back in working order. These methods are not completely safe, however. Altering batteries or altering your key fob's security can be dangerous. If you're not comfortable with these methods, it's recommended to seek advice from a professional auto-locksmith. Change the Battery It's possible to replace the battery in the case that your key fob no longer works as it should. You can buy replacement batteries in any chain drugstore nationwide or in the parts department at your local car dealership. Some manufacturers will even include a spare key fob battery in the packaging when you purchase a car from them. The first thing you'll have to do is find out which battery your key fob uses. The manufacturer will likely have this information on their website or on the actual key fob. The most commonly used battery used in a key fob is a button cell, similar to those used in remote controls and watches. These kinds of batteries are commonly sold at places like Walgreens and Energizer, and are available for under $5 for a pack of two. You can take the old battery off your key fob after you know which type of battery it is using. You can open most key fobs using your fingers or a flat tool such as a screwdriver, at the notch or seam where they join. Once the fob is opened, the battery will pop right out and you can insert the new one in the same direction as the old one. Most key fobs use CR2032 3V batteries, which are available at numerous stores that sell AAA and AA batteries. Once the new battery is installed After that, you can snap the two pieces of the key fob back together and check that all buttons are functioning correctly. Pressing the lock and unlock buttons on the key fob while pointing it at your vehicle will allow you to determine whether or not everything is functioning exactly as it should. If your vehicle still does not respond to the fob, you might require reprogramming the fob and establish wireless connectivity. This is a fairly straightforward process that requires your phone or another device. Reprogram your key fob If your key fob doesn't work and you think it needs to be replaced It may not require an entirely new battery, but rather the old one needs to be changed. This procedure differs for each vehicle. To find out how to do it you must consult the owner's manual. It's usually available in PDF format on the website of the automaker. You can also search YouTube for videos. The majority of modern automobiles require a particular procedure to put the vehicle into “programming mode,” which is usually done by pressing the power button on the driver's side door or ignition several times while pressing a button on the fob within a certain time frame. This is how the fob sends its digital identification code to the vehicle, and it stores it in its memory. After the fob is programmed, it will behave as a normal key. It is important to remember that changing the programming of a key fob will erase any other key fobs that had been programmed previously. If you wish to keep the other fobs following the first, then they should be programmed quickly and with care. You can often find replacement batteries for your key fob for your car at hardware stores, big-box retailers, or online. However, you need to be aware of the model and make of your car prior to purchasing a battery for your fob because the correct type of battery isn't always easy to locate. A CR editor stumbled across a battery for her key fob however, it came from a different vehicle. This meant that although she was able to start the car and open the doors, she wasn't capable of lowering the windows. Fortunately, the dealer can help in this situation and most dealers have the equipment needed to reprogram a fob to the specific vehicle. Dealers are required to carry out this service on certain European vehicles like Audi and BMW because they have specialized security features that can only be reset by the manufacturer. Other dealers we spoke with like those from Toyota and Lexus were willing to try reprogramming the fob in a replacement as long as you knew the exact make and model of the car you own. Replace the Button If you have tried changing the battery and programming the key fob and still not being able to start your car, it may be time to replace the button on your key. The button on the car key is subject to a lot of use and jostling, and it can be damaged or stuck over time. When you press the button on your key fob, an individual code is sent out in a sequence which the receiver inside the vehicle is able to recognize. If you attempt to operate your vehicle from a distance, it may not recognise you. It could shut the doors or turn off the engine. You can buy replacement buttons online or at many local hardware stores. They are fairly easy to open and install and only require a little clear plastic tape to cover the old button. Contact an Auto Locksmith It may be time to speak with a professional If you're experiencing issues with your car's key switch. Auto locksmiths are experts in the repair of electronic keys and locks. These experts are equipped with the tools and expertise to diagnose and fix various issues with your key fob. This includes replacing batteries and reprogramming them. They have the knowledge and skills to handle more complex jobs, like repairing a broken key or cutting a replacement key. The switch in the button for the car key is typically worn out. This is due to overuse and exposure to the elements. The switch is made from an extremely hard plastic with multiple switches on its surface. Each switch is responsible for activating the particular function you are using the key to activate. As the switch gets older, it becomes more difficult to activate these functions. This means that you will need to press harder on the switch to get it to work. This could cause more damage to the switch, thereby reducing its longevity. Replace the battery in your key fob. remote key fob repair of models of cars use lithium-ion coin or button batteries which you can buy at supermarkets, pharmacies and home improvement stores. Your key fob will work once you have replaced the battery. If the issue persists, it may be that your key fob's contacts have worn out. The contacts are made of rubber and coated with an electricity conducting film, which can wear out over time. They are exposed to elements when you use the key and are constantly exposed to dirt and moisture. They'll eventually wear down to the point that they are unable to contact with the circuit board, or the sensor underneath the keypad. The dealership can replace the key fob, however it could be costly and take a long time. You can also contact a local locksmith who will repair your key fob at less.