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How to Repair Car Key Fobs Key fobs can be damaged even if we use them often. In fact, they could be destroyed in a variety of ways. Other issues can be more grave than an unresponsive battery. Luckily, repair car key fob of them can be resolved with a quick DIY fix at home. Dead Battery A dead battery is the most frequent reason for a key fob not working. Fob batteries can be drained quickly, particularly if they're exposed to extreme temperatures, humidity or water. Keep an extra battery in your wallet in case you need it. It is easy to tell that your car key fob's battery is running low because the light on the LED will cease to blink. It's also possible that the fob will no longer work from the same distance it did in the past. In this instance the key fob might require reprogramming or replaced completely. Fortunately replacing a car key fob battery is simple. Find out the type of battery used. The type should be embossed on the back of the fob. If you're unsure then a quick Google search will help. Once you've found the kind of battery you want you want to use, open the key fob near the seam. Use a flathead screwdriver, or your fingernail to separate the two halves. Remove the old battery, and replace it with a brand new one. Make sure you insert the new battery with the positive (+) side facing up toward the buttons on the fob. Some drivers don't even realize that their fob is dead until they lock or unlock their car, and the buttons don't work anymore. This can be corrected by reprogramming the fob. However, it can be time-consuming and expensive. You can also contact roadside assistance to find out if they are able to start your vehicle and get it back on the road. If you've tried all of these options and your car is still unable to start then it's time to call a professional. A trained technician can tell whether your car's computer requires reconfiguring, or if your key fob is only in need of replacement batteries. They can also suggest an auto shop to replace your key fob. In the end, though, sometimes a brand new fob is the most effective solution. Circuit Board Damage A key fob can take many physical abuses and isn't indestructible. Battery, circuit board and buttons are all subject to wear and wear and tear. It is essential to take care of these components to ensure that your key fob is in good working order. Make sure that the battery still working in your key fob. If it is then replace the battery and determine if this fixes the problem. If not, you'll have to remove the key fob and clean the contact surfaces. It isn't easy to open some key fobs because they don't have an easy-release mechanism. You can cause damage to the fob by trying to force it apart. You can purchase a specific tool to open your key fob, however you must always follow the instructions of the manufacturer to avoid damaging it. A damaged or damaged key circuit board for the fob is another frequent issue. This can be caused by numerous factors, such as moisture or dirt getting into the battery compartment. Software issues or an accidental firmware update can be the cause of this. If your key fob has stopped functioning, you might think about having it changed. This can be done by a locksmith who is skilled in this work. Radio interference is also a possibility. This can happen if there are other wireless devices transmitting at the same frequency as your key fob, for instance radar detectors or home security systems. If this is the situation, you should contact the other device manufacturer to ensure that your key fob won't be affected by their signals. There may be a need to replace a switch or other electrical component inside your key fob. This is a more difficult fix, but you can find online guides that will show you how to do it yourself. Be cautious when doing this, as the circuit boards in your key fob are tiny and easily break in the event of rough handling. If you're doing it yourself, be sure to use an SMT switch of good quality and solder the switch in place correctly. Buttons that are worn out Car key fobs are subject to a lot wear and wear and tear. They are more prone to being dropped and spend a lot of time being tossed around in your purse or pocket. Sometimes, this jolting can cause the buttons to wear out or snagged. A simple adjustment can fix the problem. Modern key fobs are fitted with sensors that are able to detect when they've been hit. This is due to the fact that they decrease the chances of someone stealing your vehicle. If the buttons on your key fob don't work when you press them, they're damaged and should be replaced. The circuit board that is in the key fob also sends signals to your car. Those signals include unlock and lock commands, as well as instructions to start your engine. If the circuit board inside is damaged, then your key fob will not be able to unlock or start your engine. Generally, this kind of damage is caused by water, force blunt or a scratch on the circuit board. You'll notice that the buttons on your key fob are wearing out if you find yourself pressing the buttons more than normal to get them to work. In addition the fob might stop transmitting a signal to the car or it'll have a lower range than it did before. Contact a locksmith right away when you're not able to use your key fob to start your vehicle. They can determine if the key fob is damaged, or if your ignition cylinder is worn out. Fortunately, most car keyfob issues aren't very complicated or even serious. Keep a spare key fob in your vehicle always in case you end up being surprised by a malfunctioning key. This will ensure that you're never stuck in a bind due to a lost or malfunctioning key. If you do happen to lose your car key spare, a locksmith can help change the key to work with your car's ignition. They can also repair any internal damage to the key fob. Broken Case The case of a key fob does more than just shield the batteries and buttons. The case also houses the circuitry that does all the electrical magic whenever you press the key fob button. The circuit board relays the signal from your key fob to your car. Your key fob will not work if this board is damaged. Sometimes, a key fob that is dead will just need to be reprogrammed, which is something that your local auto locksmith or the dealership can help you with. Another reason why your key fob might not be working is because the batteries are not working. This is a quick fix that you can do at home by replacing the battery. The good news is that you can locate an alternative battery online or at your local auto parts store since the batteries aren't limited to key fobs. Depending on the type of key fob you have, there are different ways to open it and gain access to the inside. A quick search online should identify the type of key fob you have and the type of battery it takes. You can then buy an alternative and take the old one out, and put the new one in. When repairing a broken key fob, the main goal is not to harm the circuit or buttons further. If you attempt to pry apart the key fob using the screwdriver or another sharp edge, it could break the plastic or damage the case. A replacement case isn't much and you can find an entire fob, including the electronics on eBay or Amazon for under $40. If your key fob doesn't work, you should check if you've damaged the circuit board or the batteries. If this is not the case, you can have it repaired quickly and easily by a professional. Otherwise, it might be time to invest in an upgrade. Just be sure to check for a warranty on any replacement or used fobs you purchase online.