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How to Repair Car Key Fobs Key fobs can be damaged, even if we use them frequently. In fact, they are able to break down in many different ways. Other issues could be more important than an unresponsive battery. The majority of these issues can be solved with a quick fix at home. Dead Battery A dead battery is the most frequent cause of the key fob not functioning. Fob batteries tend to drain quickly, especially when they are exposed to extreme heat or cold temperatures, humidity or even water. Keep an extra battery in your wallet in case you require it. It is easy to tell when your car key fob's battery is dying by the fact that the LED light will stop glowing. The key fob could be unable to function from the same distance it used to. In this instance, the key fob may need to be programmed again or replaced completely. It is easy to replace the battery in a car keyfob. First, determine what type of battery is used. The type of battery you are using should be embossed in the back of your key fob. Google can help in case you're unsure. Unlock the key fob along the seam after you've identified the battery type. You will need to use small flathead screwdrivers or even your fingernail to break the two halves. Remove the old battery, and replace it with a brand new one. Place the new battery in such a way that the positive (+) face is facing the buttons on the fob. Some drivers may not realize the fob is dead until they attempt to lock or unlock their car and the buttons do not respond. In some instances this issue can be resolved by reprogramming the fob, however, it can be costly and time-consuming. You can also contact roadside assistance to find out whether they can restart 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 qualified technician will be able to determine if your vehicle's computer system requires reprogramming or if the fob requires a new battery. They can also suggest an auto repair shop that can replace the key fob. Sometimes, however, a new fob might be the best option. Circuit Board Damage The key fob isn't indestructible, but it can withstand a lot of physical damage. The 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 your key fob remains in good working order. The easiest way to test is that the battery in your key fob isn't depleted. If it is then replace the battery and check if it fixes your problem. If car key fob repair does not work, you might need to open the fob and clean the contact surfaces. This can be difficult since some key fobs don't have easy-release mechanisms that allow you to open them up and you may damage your fob if you try to force it apart. You can purchase a special tool to open your key fob, however you should always adhere to the manufacturer's guidelines to avoid damaging it. A damaged or defective key fob circuit board is a frequent issue. It can be caused by various factors, such as dirt or moisture getting into the battery compartment software, hardware issues, or even an accidental firmware update. If your key fob isn't functioning completely, you should think about having it reprogrammed by an expert locksmith who specializes in this kind of work. Radio interference is also a possibility. It could happen if are other wireless devices that transmit on the same frequency your key fob, like a radar detectors and home security systems. If this is the situation, you should contact the manufacturer of the other device to make sure that your key fob will not be affected by their signals. It's also possible that your key fob has an issue with the switch or another electrical component that needs to be replaced. This is a harder fix however, you can find online guides that will show you how to do it yourself. Be cautious when doing this, though it is important to be careful, since the circuit boards that are inside your key fob are tiny and are susceptible to breaking if they are handled roughly. If you decide to do this yourself, be sure to use a good quality SMT switch and solder it into place properly. Worn Out Buttons Car key fobs are subject to a lot of wear and tear. They're susceptible to being dropped and often spend a lot of time moving around in your purse or pocket. The constant jostling can cause buttons to wear out or get stuck. When this happens an easy adjustment could be all it takes to make it work again. Most modern key fobs come with sensors that detect if they've been pressed. This is due to the fact that they decrease the possibility of someone taking your vehicle. If the buttons on your key fob don't work when pressed, they are damaged and should be replaced. Key fobs also contain an electronic circuit inside that transmits signals to the car. These signals include commands to unlock and lock your car, as well commands to start your engine. If the circuit board inside your vehicle is damaged then your key fob might not allow you to unlock your car or even start the engine. This type of damage is typically caused by blunt force or water. You'll be able to tell that the buttons on your key fob are wearing down when you press more than normal to get them to function. In addition your fob could cease transmitting signals to the car or it'll have less range than before. If you're unable to get your key fob to unlock or start your car, you need to contact a locksmith in your area immediately. They can determine if your key fob is damaged or if the cylinder of your ignition is worn out. Fortunately, most key fobs for cars issues aren't very complicated or even serious. Keep an extra key fob in your car always in case you end up being shocked by a malfunctioning device. You won't be left stranded due to an unresponsive or lost key. If you do happen to lose your car key spare, a locksmith can help change the key so that it works with your car's ignition. They'll also be able repair any internal damage that may have been caused to your key fob. Broken Case The case of your key fob provides more than just protection for the battery and buttons. The case also houses the circuitry that executes all the electrical magic when you press a key fob button. This board takes the signal from your key fob and sends it to your car. If the board is damaged or dead the key fob won't be able to operate. A dead key fob may only need to be reprogrammed by your local auto locksmith, or dealership. Another reason why your key fob might not be functioning is that the batteries are dying. The battery can be replaced at home. The good news is that you can find the replacement battery on the internet or at a local auto parts shop since these batteries aren't exclusive to key fobs. There are several ways to open up the key fob and go inside, based on the type. A quick search on the internet will identify the type of key fob yours is and what kind of battery it requires. From there, you can purchase a replacement and easily pop the old one out and 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. When you try to break the fob using a sharp edge, such as a screwdriver can break the case or damage the plastic. Luckily, a replacement case is inexpensive and you can buy a whole fob assembly with the electronics from eBay or Amazon for less than $40. So, if your key fob doesn't work Check to see if the batteries are depleted or if the circuit board is damaged. If that's not the case, a professional can fix it quickly and cheaply. If not, it could be time to invest in a replacement. Make sure you check for a warranty on any used or replacement fobs that you purchase online.