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How to Repair Car Key Fobs Even though we test them numerous times keys aren't impervious to destruction. In fact, they could break down in many different ways. While the most common problem is the battery being dead but other issues can be more grave. Luckily, most of these can be fixed by making a quick DIY fix at home. Dead Battery A dead battery is likely the most frequent reason a car key fob stops working. Fob batteries can deplete quickly, particularly if they are exposed to extreme heat or cold temperatures, humidity or water. Keep an extra battery in your wallet in case you need it. It is easy to tell the moment the battery in your car key fob is depleted because the light on the LED will stop glowing. It is also possible that the fob won't work at the same distance it did in the past. In this scenario it could be necessary to re-program your key fob or replace it altogether. Fortunately, replacing the battery in a car key fob is a simple task. First, you need to determine the kind of battery is used. The type should be engraved on the side of the fob. If you are not sure, a quick Google search can help. Once you've found the kind of battery you want, open the key fob at the seam. nearby key repair shop 'll need an small screwdriver with a flat head or even your fingernail to break the two halves. Then, you can remove the battery that was removed and replace it with the new one in its place. Make sure to insert the new battery with the positive (+) side facing towards the buttons on the fob. Some drivers might not be aware that the fob is dead until they attempt to lock or unlock their car and the buttons don't respond. This can be corrected by reprogramming your fob. However, it can be time-consuming and expensive. Another option is to contact roadside assistance and see if they can jump your vehicle and get you back on the road. If you've tried both of these solutions and your car still won't start then it's time for an expert. A certified technician can determine whether your car's computer requires reprogramming, or if the fob simply needs an upgrade in battery. They can also recommend a reliable auto repair shop to replace your fob's keys. In the end it is not always the case that a new fob is the most effective solution. Circuit Board Damage The key fob isn't impervious to destruction, but it can endure a lot of physical damage. The battery, the circuit board, and buttons all get their fair share of wear and tear with time It is therefore essential to be aware and take care of them to keep your car key fob working efficiently. Check that the battery is still functioning on your key fob. Replace the battery to see if it solves the issue. If this doesn't work, you may need to open the fob and clean the contact surfaces. It isn't easy to open certain key fobs since they don't have an easy-release mechanism. You may harm the fob by trying to force it apart. You can buy a tool to open your key fob. However, you should always follow the instructions of the manufacturer to avoid damaging the. A damaged or corrupted key circuit board for the fob is another frequent issue. This can be caused by various factors, such as dirt or moisture that gets into the battery compartment, software issues or even an unintentional firmware update. If your key fob isn't working, you may be interested in having it reprogrammed. This can be accomplished by a locksmith who specializes in this work. Radio interference is another possible cause. This can occur when you have other wireless devices that transmit on the same frequency, for example, radar detectors or home security systems. If this is the case you need to contact the manufacturer of the other device to ensure that your key fob won't be affected by their signals. It is also possible to replace a switch or other electrical component in your key fob. This is a more difficult fix, but you can find guides online that explain how to do it yourself. You should be careful when doing this, however, because the circuit board that is inside your key fob is very small and could easily break if handled with care. If you decide to do this yourself, be certain to use a top quality SMT switch and then solder it to the correct place. In a state of wear Out Buttons Car key fobs are prone to quite a bit of wear and wear and tear. They are susceptible to being dropped and spend a lot of time being tossed around in your purse or pocket. Sometimes, this can cause the buttons to become worn out or snagged. A simple adjustment can solve the problem. Modern key fobs are fitted with sensors that detect when they've been pressed. This is due to the fact that they decrease the chances of someone stealing your vehicle. If your key fob's buttons don't respond when pushed this is a sign that they're worn out and need to be replaced. Key fobs also contain an internal circuit board which transmits signals to your car. These signals include commands to unlock and lock your car, as well commands to start your engine. If the circuit board inside is damaged, your key fob may 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. If you have to press the buttons harder than normal to activate them, then your key fob buttons are becoming worn out. In addition the fob might stop sending a signal to the car or have a lower range than it did before. Contact a locksmith immediately in the event that you are not able to use your key fob to start your vehicle. They can determine if the key fob is damaged, or if the cylinder of your ignition is worn out. Fortunately, most key fobs for cars problems aren't complicated or serious. The best way to avoid being caught off guard by a malfunctioning key fob is to have an extra in your pocket at all times. You'll never be stranded due to an issue with your key or a lost one. If you lose your spare key, a professional locksmith can reset it to work with your vehicle's engine. They can also fix any internal damage to the key fob. Broken Case The case of a key fob does more than just protect the batteries and buttons. The case also houses the circuitry that does all the electrical magic when you press a key fob button. The circuit board receives the signal from your key fob, and then transmits it to your car. The key fob won't function if the board is damaged. Sometimes, a dead key fob can be reset which is something your local auto locksmith or the dealership can help you with. Another reason your key fob might not be working is that the batteries are not working. The battery can be replaced at home. The good news is that you can locate the replacement battery on the internet or at a local auto parts store since the batteries aren't limited to key fobs. There are many ways to open up a key fob and get inside it, based on the kind. A quick search online should identify the type of key fob you have and what kind of battery it requires. From there, you can buy a replacement and easily pop the old one out and put the new one in. The most important thing to consider when fixing a broken car key fob is that you don't want to cause damage to the circuit board or buttons any further. If you try to pry away the key fob with a screwdriver or other hard edge, it can crack the plastic or damage the case. Luckily, a replacement case is cheap and you can buy a whole fob assembly with the electronics from eBay or Amazon for less than $40. If your key fob does not function, make sure you have damaged the circuit board or batteries. If that's not the case, a professional will repair it quickly and inexpensively. Otherwise, it might be time to invest in a replacement. Make sure to verify the warranty on any replacement or used fobs that you purchase on the internet.