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Key Fob Replacement and Repair Modern car key fobs are used often and are often abused. Sometimes, an easy repair or replacement is all it takes to make them functional again. Most fobs use flat-watch-style batteries that are readily available in hardware stores and auto parts retailers. Before calling in a professional, do a few DIY fixes. Dead Key Fob Batteries The key fob's battery powers the remote you have in your car and in push-to start cars it will start your engine. It is therefore important to maintain a working healthy and a good battery. When you're out and about and your key fob is not working, it can cause a lot of trouble. The good news is that a simple, inexpensive replacement is able to fix the issue quickly. The most obvious sign that a key fob's battery is failing is the loss of signal strength and range. It is also possible to notice that the buttons on your key fob aren't working or require more effort. It is common to find a new key fob battery in the auto parts section of a large box store or on the internet. The majority of these batteries are CR2032 and CR2025 and are available in packs of 2 or more. Make sure to consult your owner's manual prior to you decide on the best battery. Some cars require a specific size or type of battery, which is not always available at big-box stores. Make sure to verify before you buy. Typically, the battery is located in the back of your key fob. It can be removed by prying the case open using a flat-blade screwdriver. It will usually resemble an ordinary coin and will be labelled with the battery's size. Be sure to note down the orientation of the plus and minus marks in order to insert the battery correctly. After the replacement battery is inserted, gently snap both pieces of the fob together and test the buttons to make sure they function. It's worth noting that when your key fob is unable to stop functioning even after a battery replacement, it could be deprogrammed. In this case, a locksmith will be needed to help you. This will cost more than replacing the key fob's battery. If your fob's battery is dying or you're having other issues with your fob's battery, an experienced mechanic like one from YourMechanic can examine and fix it to get you back on the road. Set up an appointment to review all the services we offer in your area. Weak Signals If you find that your key fob isn't responding as you would expect to the buttons on the remote, this could be a sign of a problem with the signaling. Your car and key fob are dependent on radio signals to communicate, and weak or inconsistant signals can result in poor performance and range. One of the first things you should check is whether or not your fob's battery is low because this could significantly affect the sensitivity of the signal. Resetting the settings on the fob could also aid in restoring a regular response. The procedure may differ from vehicle to vehicle. car key repair cost or a call to the manufacturer's support line is the best guide. Other factors, like interference from other devices operating on the same frequency can also contribute to weak signals. Other key fobs and wireless communication devices may interfere with the RF (radio-frequency) signals that your key fob sends to connect to the receiver of your vehicle. Furthermore, physical damage to your key fob can also interfere with the transmission of RF signals which may result in poor range and performance. A blown fuse, broken or cracked button or a bent case of the fob may affect signal transmission and cause the remote not to function properly. You can attempt to resolve the issue by resetting your fob's settings, or by replacing the battery. If your fob is old and worn, it could be the right time to replace it. Don't forget to utilize the spare remote that came with your car in the event that your primary remote starts to fail. Try this method first to determine if you can solve the issue prior to purchasing a new remote. If not, it could be the best time to consult an experienced auto locksmith. They will be able to identify the issue and suggest the best course of actions. Physical Damage Key fobs may have issues from time to time. Fortunately, most of these problems are not complicated or a major issue and can be solved by following a few simple steps. It's important to keep spare batteries or another fob available in case one of your keys fails to work. A dead battery is the most common cause of a car keyfob not working. These tiny devices are powered by lithium-ion button or coin cell batteries. They are easily replaced and are available in most pharmacies and stores. You can access the fob's case using an screwdriver that has a flat-head and gently pull out the battery that is in there. Replace the battery, ensuring that it's not damaged, loose or damaged. The majority of fobs use CR2032 batteries, but yours might require an alternative kind. Your fob could also stop responding to buttons if it loses its connection with your vehicle. This can be caused by many factors like changing the batteries. However, an auto Locksmith or a local dealership can usually solve the issue. If none of the methods above work, you can try this trick: disconnect the battery from the car and fob for a short period of time and then connect them in a reverse order. This can force the system to restart and in certain cases it will resolve the issue without further steps. Keep the fob clear of water or other sources of harm while you're experimenting. Fobs can be quite durable, but it's important to take care with it if you want it to last as long as you can. If the suggestions above do not help, it may be time to consider replacing your key fob. If it's been dropped and trampled or exposed to extreme conditions, it might not be repairable and will require a replacement. Shop around to find the best deal. Lost Fob Even with the best of care, car key fobs can fail at times. It can be expensive to replace yours if you lose it and especially if you do not have an extra. “ car key repair cost could end up paying $50 to $100 for a new one and having it programmed by the dealer, plus mechanical backups that could cost you another $100,” says Mel Yu an automotive analyst at Consumer Reports. One of the most common reasons for a key fob to stop working is a simple problem, such as a weak battery. If you are familiar with how to change the battery, or if your owner's guide has instructions, you can try it yourself. If that doesn't work you'll have to call an expert. A locksmith is able to help you find your lost fob or get it replaced. A locksmith can probably tell you the reason why your fob stopped working in the first initial place. And if your vehicle is a model older than the one you own and has no smart technology built-in You can save money by finding the key number plate on your existing mechanical backup key (it's usually hidden behind a decorative keychain ornament) and storing it in a safe place—such as in your wallet or on your phone. This can make it easier for a locksmith to reprogram a new key fob for your car if you ever need to do so. If your existing key fob is a smart key of the present, you'll have to visit a locksmith or a dealership to deprogram it before getting a new one made and this can be more expensive than simply replacing it. Modern key fobs are secured by rolling-code encryption which stops thieves from gaining access to the car. This means that locksmiths must have a special programing tool that is available only to the car manufacturer, which increases the cost. In most cases, the entire service will be billed at the same time. This includes all costs for reprogramming a keyfob. This could range from around $20 in some stores to more than $200 at car dealerships, depending on the model of vehicle.