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Key Fob Replacement and Repair Key fobs on modern cars are very efficient and are subject to a lot of abuse. Many times just a simple repair or replacement is all that's required to get them back in working order. Most fobs use flat watch-style batteries that can be found in auto parts retailers. Before calling a professional, you can do some DIY fixes. Dead Key Fob Batteries The key fob battery powers the remote function in your car. It also, in conjunction with push-to start vehicles, permits it to start your engine. It is therefore important to maintain a working and healthy battery. A dead key fob can be an issue when you're traveling. A simple, inexpensive replacement can fix the issue quickly. The loss of range and signal strength are among the most commonly observed signs that a keyfob battery is failing. You may also notice the buttons on your key fob aren't working or require more effort. You will often find an updated key fob battery in the auto parts section of a large box store or on the internet. They are typically CR2032 or CR2025 batteries and are available in packs of two or more. Make sure to consult your owner's manual prior to you purchase the correct battery. Certain vehicles require a certain size or kind of battery that's not always in stock at big-box stores Be sure to know the right specs before you buy. The battery is typically located at the back of the key fob. It can be removed using an abrasive screwdriver with a flat blade by prying the case open. The battery will look similar to a small coin and be labeled based on its size. Make sure to note the orientation of the plus and minus signs so that you can put the new battery in the correct place. After the replacement battery is installed, gently snap the two pieces of the fob together and test the buttons to make sure they function. It's worth noting that in the event that your key fob continues to stop functioning even after battery replacement, it may have been deprogrammed. In this case, you'll need to contact locksmiths for assistance, which will cost some more than replacing the battery of your key fob. Whether your fob battery is failing or you're experiencing other issues with your fob's key an experienced mechanic such as one from YourMechanic can check and repair it to get you back on the road. Make sure you check out the range of services we offer in your area and make an appointment now! 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 an indication of a problem with signaling. Your car and key fob depend on radio signals to communicate, therefore weak or inconsistant signals can cause poor range and performance. One of the first things you should examine is whether the battery of your fob is depleted since this can greatly impact signal sensitivity. It's also advisable to reset the settings on your fob and help restore a more consistent 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 the best guide. Other factors, such as interference from other devices that operate at the same frequency can also cause weak signals. Power lines, other key fobs, wireless communication devices, and even cellular networks can disrupt the RF (radio frequency) signals that your key fob uses to connect to the receiver inside your vehicle. Finally physical damage to your key fob can affect the transmission of RF signals, which could result in a decrease in performance and range. A blown fuse, broken or cracked button or a bent case of the fob can affect the transmission of signals and cause the remote to respond. There are a few easy steps you can follow to try and fix the problem of weak fob signals for example, resetting the fob's settings or changing the battery. If your fob is old and worn, it could be the right time to replace it. Don't forget to remember that if you have a spare key fob that is part of your vehicle, it can be used instead of the primary remote if it begins to fail. Try this method first to see if you can resolve the issue before buying an entirely new remote. In this situation, it might be an appropriate time to consult an expert auto-locksmith. They will be able to identify the issue and recommend the best course of action. Physical Damage Key fobs can have problems occasionally. Luckily, the majority of these problems are not complicated or a major issue and can be resolved with a few easy steps. It's important to keep spare batteries or another key fob in the event that one of your keys ever fails to work. A dead battery is the most common reason for a car keyfob not working. These little devices depend on tiny lithium-ion coin or button cell batteries to function. They are easy to replace and can be found in most pharmacies, grocery stores, and other places that sell electronic products. You can open your fob's case using an screwdriver that has a flat-head and gently pry out the battery. Ensure that it is not damaged or loose and then simply pop in the new battery. The majority of fobs use CR2032 batteries, but yours may require a different type. If your device loses its pairing, it could cease to respond to buttons. This could be due to a variety of factors like changing the batteries. However an auto Locksmith or a local dealer can usually repair the issue. You can try this method to solve your fob issue when none of the other methods work: remove the battery from both the fob and the car for about ten minutes, then reconnect them in the opposite order. This can force a restart within the system, and in some cases this will fix the problem without doing any of the other steps. Keep the fob away from water or other sources of damage while experimenting. The fob is tough, but you should take care with it to ensure it lasts for as long as you can. If the above troubleshooting tips aren't working, it could be time to replace your key fob. If car key repair service 's been dropped or tripped over, or exposed to other harsh environmental conditions it could be beyond repair and may require an upgrade. If that's the case, be sure to search for a deal before making a final decision. Lost Fob Even with the best of care it's a fact in the road that car key fobs will occasionally fail to function. It's costly to replace yours when it is lost particularly if you do not have an extra. “You might end up paying $50 – $100 for a new one and having it programmed by the dealer, and mechanical backups that could cost you another $100,” says Mel Yu an automotive analyst at Consumer Reports. A weak battery is among the most common causes for a keyfob's device to cease to function. You can try changing the battery yourself if you know how or get instructions from your owner's manual. If this doesn't work, you'll need to call an expert. A locksmith can be able to help you find your lost fob, or get it replaced. They will also likely have a good idea of the reason your fob stopped working in the first place. If your vehicle is an older model with no smart technology built-in You can save money by finding the key number plate on your current mechanical backup key (it's usually hidden behind a decorative keychain ornament) and storing it in a secure location, such as in your wallet or on your phone. If you're in need of reprogramming the key fob of your car the locksmith can perform the task more easily. If the key fob you have is a modern smart key and you want to change it, you'll need to go to a locksmith or a dealership to remove it from the system and have an entirely new one and this can be more expensive than replacing it. Modern key fobs are secured by encryption using rolling-codes that prevents thieves from gaining access to your car. And that means the locksmith needs to have an exclusive programing tool that only the car manufacturer has, which adds to the overall cost. In most instances, you'll need to pay for the entire service at once, which includes the cost of programming a new key fob. Depending on the type of vehicle it could cost anywhere from a mere $20 at some shops to $200 or more at a dealership for cars.