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Key Fob Replacement and Repair Modern car key fobs are used frequently and are frequently abused. In most cases, an easy repair or replacement is all that's needed to make them functional again. Most fobs use flat watch-style batteries that are easy to find in hardware stores and auto parts stores. Before calling an expert, try a few DIY fixes. Dead Key Fob Batteries The key fob battery powers the remote function in your car. It also, with push-to-start vehicles, allows it to start your engine. As a result, it is crucial to maintain an active, healthy battery. When you're on the go and your key fob is not working, it can cause a lot of trouble. The good news is that a simple, affordable replacement can be made to fix it in a short time. The loss of range and signal strength are among the most frequent indicators that a battery in a keyfob is failing. It is also possible to find that the buttons on your fob do not function or require any effort to turn on. A new key fob can be found in the auto parts section of a large retailer or online. Typically, these batteries are CR2032 and CR2025 and are available in packs of 2 or more. However it's a good idea to check your owner's manual prior to purchasing the correct battery for your vehicle. Some cars require a particular size or type of battery that's not always available at big-box retailers So, make sure you know the right specs before you purchase. The battery is usually found on the back of the key fob. It can be removed using the flat-bladed screwdriver, by prying the case open. It is usually shaped like an ordinary coin and will be labelled with the battery's size. Be sure to note the orientation of the plus and minus marks so that you can put the new battery in the correct place. After the replacement battery is placed in the fob, gently snap both pieces of the fob in place and test all of the buttons to ensure they work. If your key fob still isn't working after replacing the battery, it might have been deprogrammed. In this scenario you'll need to call an expert locksmith which will cost some more than replacing the key fob battery. The skilled mechanics at YourMechanic are able to repair your key fob if it's damaged or the battery has died. Make an appointment to look over all of the services we provide in your area. Weak Signals If you notice 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. Radio signals are used to transmit information between your car and the key fob. Weak or inconsistent radio signals can cause poor performance and a limited range. Examining the battery level of your fob is a good idea, as it can have a significant impact on signal sensitivity. Resetting the settings of the fob can also help restore a more consistent response. The procedure differs from vehicle to vehicle, so your owner's manual or call to the manufacturer's help line is probably the best source of information here. Other factors can contribute to weak fob signals, for example, interference from other devices operating on the same frequency as your key fob. Power lines, other key fobs, wireless communication devices, and even cell networks can interfere with the RF (radio frequency) signals that your key fob uses to connect to the receiver in your vehicle. Finally physical damage to your key fob can also interfere with the transmission of signals RF, which can result in poor range and performance. A blown fuses, a damaged or cracked button, or a bent case on the fob could affect signal transmission and cause the remote not to respond. You can try to solve the issue by resetting the fob's settings or by replacing the battery. If your fob is old and worn out, it's probably time to replace it altogether. Don't forget to use the spare remote that came with your car if your primary remote begins to fail. It's worth trying this solution to see if it solves the issue before investing in an entirely new one. In this instance it could be the right the right time to contact an expert auto-locksmith. They'll be able to diagnose the problem and suggest the best course of action. Physical Damage It's not uncommon for key fobs to experience problems from time to time. Luckily, the majority of these issues aren't serious or complex and can be fixed with a few easy steps. It's a good idea to keep spare batteries or a different fob in case your key ever ceases to work. The most common reason for a car key fob not working is a dead battery. These tiny devices are powered by lithium-ion button or coin cell batteries. key car repair are easily replaced and can be found in most pharmacies and stores. You can open your fob's case using a screwdriver with a flat head and gently remove the battery. Replace the battery, ensuring that it's not damaged or loose. Most fobs use CR2032 batteries. However, yours might require an alternative kind. Your fob could also stop responding to the buttons when it loses its connection to the car. This can happen due to a number of factors, such as changing the batteries, but it is generally simple for an auto Locksmith or your local dealer to resolve. If none of the methods above work, you can try this trick: disconnect the batteries from the car and the fob for a short period of time and then connect them in a reverse order. This could trigger a restart within the system, and in some cases, this alone will fix the issue without having to do any of the other steps. While you're testing the fob, make sure to keep it out of water and other damage sources. The fob is tough but you need to treat it with care to ensure that it lasts as long as it can. If all of the above troubleshooting tips aren't working, it could be time to replace your key fob. If it's been dropped or trampled upon, or exposed to extreme environmental conditions, it may not be able to be repaired and will require a replacement. Look around for the most competitive price. Lost Fob Even with the best of care keys to cars can fail at times. If you lose yours it could be very expensive to replace it—especially if you don't have a spare. “You may end up paying $50 – $100 for a replacement 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 stop working. You can try replacing the battery on your own If you are familiar with the procedure or get instructions from your owner's manual. If that doesn't solve the problem, you need to get help from an expert. A locksmith can help to find or replace your lost key fob. They'll also have a good idea of the reason why your fob stopped working in the first place. If your vehicle is an older model with no smart technology built-in it is possible to save cash by locating the key number plate on your existing mechanical backup key (it's typically hidden behind a decorative keychain) and recording it in a secure location, such as your wallet or on your phone. If you need to reprogram the key fob of your car locksmith is able to do it much more quickly. If your key fob is an older smart key, it'll have to be deprogrammed by a locksmith or dealer. This could cost more than just replacing it. Modern key fobs are secured by encryption using rolling-codes that prevents thieves from gaining access to the car. This means that locksmiths need an exclusive programming tool that only the car manufacturer has, which adds to the overall expense. In most instances, the entire service will be billed at once. This includes all costs for reprogramming a new keyfob. It can cost anywhere from $20 at some shops to more than $200 at dealerships for cars, based on the model of vehicle.