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Key Fob Replacement and Repair The key fobs in modern vehicles do a lot of work and are subject to lots of abuse. Sometimes an easy repair or replacement is all it takes to restore them to working order. Most fobs run on a flat watch-style batteries. This can be found in hardware and auto parts stores. Before calling a professional, you can do a few DIY fixes. Dead Key Fob Battery The key fob battery powers the remote function in your car and, with push-to start vehicles, permits it to start your engine. This is why it is critical to maintain an efficient, functioning battery. When you're on the move and your key fob is not working, it could be a major issue. The good news is that a cheap, simple replacement is able to fix the issue quickly. The loss of range and signal strength are the most frequent signs that a keyfob battery is failing. You may also notice the buttons on your key fob aren't working or require extra effort. A new key fob is available in the auto parts section of a big retailer or on the internet. They are typically 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 that isn't always readily available at big-box stores. Make sure to verify before purchasing. Typically, the battery is located on the back of your key fob and is removed by tearing the case open with a flat-blade screwdriver. The battery will look similar to tiny coins and be labeled according to its size. Make sure to note the direction the plus and minus symbols are oriented to ensure that the battery you are replacing is placed correctly. After the battery has been replaced and the fob is closed, gently snap the two pieces of the fob back together and test the buttons. If your key fob still isn't working after replacing the battery, it might have been deprogrammed. In this instance it is likely that a locksmith will be required to assist. This will cost more than just replacing the key fob's battery. If your fob's battery is failing or you're experiencing other issues with your fob's key, 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 the range of services we offer in your area. Weak Signals If your key fob does not respond to the buttons on the remote, it could be an indication that the signaling is not functioning correctly. Radio signals are used to communicate between your car and key fob. Poor or inconsistent radio signals can lead to poor performance and range. The battery level of your fob is a good idea because it could have a significant impact on signal sensitivity. It's also advisable to reset the settings of your fob and help bring back the same response from the car. The process will vary from vehicle to vehicle. Your owner's guide or a phone call to your manufacturer's support line is your best guide. Other factors can contribute to weak fob signals, including interference from other devices operating on the same frequency as your key fob. Other key fobs as well as wireless communication devices may interfere with the RF (radio-frequency) signals that your key fob transmits to the receiver of your vehicle. The physical damage to your keyfob can interfere with the transmission of radio signal, which can result in lower performance and less range. A blown fuses, a damaged or cracked button, or a bent case on the fob may all affect the signal transmission and cause the remote to respond. There are some simple steps you can try to and solve the issue of weak fob signals, for example, resetting the fob's settings, or replacing the battery. If your fob is old and worn out, it might be the right time to replace it. Also, don't forget if you have an extra key fob which comes with your vehicle, it could be used instead of the primary remote if it starts to fail. It's worth trying this solution to see if it can solve the issue before you invest in an entirely new one. If not, it might be the best moment to call a professional auto locksmith. They will be able to determine the cause and suggest the most effective solution. Physical Damage It's not unusual for key fobs to encounter problems from time to time. The majority of these issues are not complex or difficult to fix and can be solved with just a few steps. It's also a good idea to keep spare batteries or another fob available in case one of your keys ceases to function. The most frequent cause for the car key fob not working is a dead battery. These tiny devices depend on tiny lithium-ion coin or button batteries to function. These are easily replaced and can be found at most pharmacies, grocery stores, and other places that sell electronic products. car key fob repairs can access the fob's casing using an screwdriver that has a flat-head and gently pull out the battery that is in there. Make sure it's not loose or damaged and then simply pop in an alternative battery. Most fobs utilize CR2032 batteries, however yours might require an alternative type. If your device loses pairing, it can cease to respond to buttons. This could be due to a variety of factors, such as changing the batteries, however it is generally simple to get an auto Locksmith or your local dealership to fix. If none of the strategies above work, try this trick: unplug the batteries from the car and the fob for a few minutes, then reconnect the two in the opposite order. This may cause the system to restart and in certain cases it can fix the issue without further steps. While you're experimenting with the fob, ensure to keep it away from water and other sources of damage. A fob can be pretty robust, but it's crucial to take care with it if you want it to last as long as it can. If none of the troubleshooting procedures above are helpful you, you may have to replace your key fob. If yours has been dropped or tripped over, or exposed to other extreme environmental conditions, it could be damaged beyond repair and in need of a replacement. Find the most competitive price. Lost Fob Even with the best care keys for cars, they can fail at times. It's expensive to replace yours in the event that you lose it and especially if you do not have an alternative. “You may end up paying between $50 and $100 for a replacement, and getting it programmed by the dealer, as well as an electronic backup that could cost another $100,” says Mel Yu an automotive analyst at Consumer Reports. A weak battery is one of the most common reasons for a keyfob to cease to function. If you are aware of how to replace the battery, or if your owner's guide has instructions, try it yourself. If that doesn't work, you'll need to call an expert. A locksmith is able to help you find your lost fob or get it replaced. They'll also probably have a good idea of why your fob was not functioning in the first place. And if your vehicle is a model older than the one you own and has no built-in smart technology, you can save some cash by locating the key number plate that is on your existing mechanical backup key (it's typically hidden behind a keychain ornament with a decorative design) and storing it in a secure location, such as in your wallet or on your phone. This will make it much easier for a locksmith to reprogram a new key fob for your car in the event that you need to do it. If your key fob is an older smart key, it will need to be deprogrammed by a locksmith or dealer. This can cost more than replacing it. Modern key fobs are secured by encryption using rolling-codes that prevents thieves from getting access to your car. This means that the locksmith must have a special programing tool that only the car manufacturer has, which increases the overall cost. In most cases, the entire service will be billed at once. This includes any costs to reprogramme a new keyfob. This could range from around $20 in certain stores to more than $200 at dealerships for cars, based on the model of vehicle.