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How to Repair Car Key Fobs Key fobs can become damaged, even if we use them frequently. They can actually be destroyed in different ways. While the most common issue is an unresponsive battery however, other issues could be much more grave. Fortunately, the majority of them can be resolved by a simple DIY fix at home. Dead Battery A dead battery is probably the most common reason the car key fob stop functioning. Fob batteries drain quickly, especially when they're exposed to extreme conditions like humidity, temperatures or even water. key repairs 's a good idea to keep an additional fob battery in your wallet just in case. You will usually know when your car key fob's battery is dying because the light on the LED will stop glowing. It's also possible that your key fob won't function at the same distance it did in the past. In this scenario it might be necessary to re-program your key fob or replace it altogether. It is simple to replace a car keyfob battery. First, find out what type of battery is used. The type of battery should be engraved on the side of the fob. If you're not sure, an easy Google search will be helpful. Once you've identified the kind of battery you want you want to use, open the key fob at the junction. Make use of a flathead screwdriver or your fingernail to break the two halves. Remove the old battery, and replace it with a new one. Insert the new battery so that the positive (+) face is facing the buttons on the fob. Some drivers aren't aware that their fob has died until they lock or unlock their vehicle and the buttons no longer work. This can be corrected by reprogramming the fob. However, it can be time-consuming and expensive. You can also call roadside assistance to see whether they can jumpstart your car and get it back on the road. If you've tried both solutions but your vehicle doesn't turn on, it's time to speak with a professional. A trained technician will be able to determine if the car's computer system needs reprogramming or the fob simply requires an upgrade in battery. They can also recommend an auto repair shop that can replace the fob that you use to access your car. In the end, though it is not always the case that a new fob is the most effective solution. Circuit Board Damage The key fob isn't indestructible, but it is able to withstand a lot of physical harm. The circuit board, battery and buttons are all subject to wear and tear. It is essential to take care of these parts to keep your key fob in good condition. Make sure that the battery still working in your key fob. If it is replaced, check if it fixes your issue. If not, you may require opening the key fob and clean the contact surfaces. This can be difficult because some key fobs don't have easy-release mechanisms that allow you to open them up, and you can easily harm your device if you attempt to break it. You can purchase a special tool to open your key fob. However, you should follow the directions of the manufacturer to avoid damaging it. A damaged or corrupted key circuit board for the fob is another common problem. It can be caused by numerous factors, such as moisture or dirt getting into the battery compartment. Software issues or even an unintentional firmware update may be the cause of this. If your key fob isn't working completely, consider having it reprogrammed by a locksmith that specializes in this type of work. Radio interference is also a possibility. This could happen in the event that you have other wireless devices that transmit at the same frequency, such as radar detectors or home security systems. If this is the case, you should check with the other device manufacturers to ensure that your key fob isn't being affected by their signals. You may also need to replace a switch or an electrical component in your key fob. This is a harder fix, but you can find guides online that show you how to fix it yourself. Be careful, however, as the circuit board in the key fob is tiny and can easily break if handled roughly. If you do this yourself, make sure to use a high quality SMT switch and solder it to the correct place. Buttons that are worn out Car key fobs are susceptible to a lot wear and tear. They are prone to being dropped, and they often spend a lot of time jostled around in your purse or pocket. Sometimes, this jostling can cause buttons to wear out or become stuck. A simple adjustment can solve the problem. Most modern key fobs come with sensors on them that can detect when they've been used. This is because they lower the possibility of someone taking your vehicle. If the buttons on your key fob don't respond when pressed, they are worn out and need to be replaced. Key fobs also have an electronic circuit inside that transmits signals to the car. These signals include commands to unlock and lock your car, as well as commands to start the engine. If the circuit board inside your vehicle is damaged then the key fob you have may not unlock your vehicle or even start the engine. This kind of damage is usually caused by water or blunt force. You'll be able to tell that the buttons on your key fob are wearing out if you find yourself pressing them harder than normal to get them to work. Additionally, your fob may cease transmitting signals to the car or it'll have less range than it did prior to. Contact a locksmith right away if you are unable to use your key fob for your car. They'll be able to tell whether the key fob itself is damaged or your ignition cylinder has worn down. Fortunately, most car keyfob problems aren't complicated or serious. Keep an extra key fob in your vehicle always in case you end up being shocked by a malfunctioning device. This will ensure that you're never trapped in a place because of a lost or malfunctioning key. If you do happen to lose your spare car key, a locksmith will be able to change the key to work with the ignition in your car. They can also repair any internal damage to the key fob. Broken Case The case of a key fob does more than protect the buttons and batteries. The case also houses the circuitry that does all the electrical magic when you press the button on your key fob. The board transmits the signal from your keyfob to your car. If the board is damaged or dead your key fob will not be able to operate. Sometimes, a dead key fob may need to be reprogrammed, which is something your local auto locksmith or the dealership can assist you with. Another reason why your key fob may not be working is that the batteries are not working. The battery can be replaced at home. The positive side is that you can locate an alternative battery online or at your local auto parts shop since these batteries aren't exclusive to key fobs. Depending on the type of key fob you have, there are a variety of ways to open it and access the insides. A quick search on the internet will show you which type of key fob you have and the type of battery it requires. From there, you can purchase a replacement and easily pop the old one out and put the new one in. The main concern when you repair an old car key fob is that you don't want to harm the circuit board or buttons further. If you attempt to pry away the key fob with the screwdriver or another sharp edge, it could break the plastic or damage the case. key fob repair isn't much and you can buy an entire fob, including the electronics on eBay or Amazon for less than $40. If your key fob does not work, check if you've damaged the circuit board or the batteries. If this isn't the case, a professional will fix it quickly and cheaply. If not, it could be time to replace the fob. Be sure to check the warranty of any replacement or used fobs that you purchase online.