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Key Fob Replacement and Repair The key fobs found in modern vehicles perform a lot of work and are subject to lots of abuse. In most cases, just a simple repair or replacement is all that's needed to make them functional again. Most fobs use flat watch-style batteries that are readily available in auto parts retailers. Before car key repair service call an expert, you can try a few DIY fixes! Dead Key Fob Battery The battery of the key fob powers your car's remote and in push-to start cars, it can start your engine. It is therefore crucial to maintain a functional, healthy battery. When you're out and about, a dead key fob could be a major issue. A simple, inexpensive replacement will fix the problem quickly. The most common sign that a key fob's battery is depleting is the loss of signal strength and range. It is also possible to notice that the buttons on your fob do not work or require extra effort to be activated. You will often find an updated key fob battery in the auto parts section of a big box store or on the internet. Typically, they're CR2032 or CR2025 batteries and are available in packs of two or more. However, it's a good idea to consult your owner's manual before shopping for the correct battery for your fob. Some cars require a specific size or type that isn't always available at big-box stores. Be sure to check before purchasing. The battery is usually found in the back of the key fob. It is removed using the flat-bladed screwdriver, by removing the case. The battery will look like a small coin, and it will 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 positioned correctly. Once the battery replacement is inserted, gently snap both pieces of the fob together. Then test each button to make sure they function. If your key fob still doesn't work after replacing the battery, it may be deprogrammed. In this instance, a locksmith will be needed to help you. This will cost more than just replacing the battery in the key fob. If the battery in your fob is dying or you're having other issues with your key fob An experienced mechanic like one from YourMechanic can inspect and repair it to get you back on the road. Schedule an appointment to see 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 a sign that the signaling is not functioning properly. Radio signals are used to transmit information between your car and the key fob. Weak or inconsistent radio signals can lead to low performance and limited range. One of the first things to check is whether or not the battery of your fob is depleted since this can greatly affect the sensitivity of the signal. Resetting the settings on the fob can also help restore a more consistent response. The procedure may differ from vehicle to vehicle. The owner's manual or a call to the manufacturer's support line is your best guide. Other factors can cause weak fob signals, for example, interference from other devices that operate on the same frequency as your key fob. Other key fobs and wireless communication devices may interfere with the radio frequency (radio-frequency) signals your key fob sends to connect to the vehicle's receiver. Additionally physical damage to your key fob can also interfere with the transmission of RF signals, which may result in poor range and performance. A damaged or blown fuse, a broken or cracked buttons or bent fob case can all affect the transmission of signals, causing the remote to fail to respond. There are a few simple steps you can take to try and solve the issue of weak signals from your fob, such as resetting the fob's settings or replacing the battery. If your fob is worn out, it's probably time to replace it completely. Don't forget to use the spare remote that was included with your vehicle if your primary remote starts to fail. You should test this option first to see if you can fix the problem before purchasing an entirely new remote. If not, it could be the perfect moment to call an expert auto locksmith. They'll be able to diagnose the problem and suggest the most effective course of action. Physical Damage Key fobs may have issues from time to time. Most of these issues are not complex or serious and can be resolved by following a few easy steps. It's also a good idea to keep spare batteries or an additional fob in case one of your keys fails to work. The most common reason for a car key fob not working is the battery is dead. These tiny devices are powered by lithium-ion button or coin cell batteries. These are easily replaced and can be found in most pharmacies, grocery stores, and other places which sell electronic items. You can remove your fob's shell with an screwdriver that has a flat-head and gently remove the existing battery. Ensure that it is not damaged or loose, and then insert an alternative battery. Most fobs require CR2032 batteries. However, yours might need a different type. Your fob might also stop responding to buttons when it loses its pairing with the vehicle. This could be due to a number of reasons, including changing the batteries, but it is usually easy to get an auto Locksmith or your local dealership to fix. If none of the strategies above work, try this method: disconnect the batteries from the car and fob for a short period of time and then connect them in a reverse order. This may cause the system to reboot, and in certain cases it can fix the issue without further steps. When you're playing around with the fob, make sure to keep it out of water and other sources of damage. A fob is durable, but you should treat it with care to make it last for as long as you can. If all of the suggestions above do not help, it may be time to consider replacing your key fob. If it's been dropped, trodden on or subjected to other harsh environmental conditions it could be damaged beyond repair and may require an upgrade. Find the most competitive price. Lost Fob Even with the best care, car key fobs may fail to function. If you lose yours it can be extremely expensive to replace it—especially in the event that you don't have spare. “You may end up spending $50 or more to get an alternative from the dealer and have it programmed, as well as a new mechanical backup, which will cost at least another $100,” says Mel Yu who is an automotive analyst at Consumer Reports. One of the most frequent reasons for a key fob to stop working is a simple issue, like an insufficient battery. If you are familiar with how to replace the battery, or if your owner's manual contains instructions, try it yourself. But if that doesn't fix the problem, you need to contact an expert. A locksmith can be capable of helping you locate your lost fob, or get it replaced. They'll also probably have an idea of why your fob stopped functioning in the first place. If your car is old and doesn't have smart technology built in it is still possible to save money by recording the key number plate from your mechanical backup key. It's typically hidden behind a keychain with an ornamental design. This will make it much easier for the locksmith to reprogram a new key fob to your car should you need to do so. If your key fob is an old smart key, it'll need to be deprogrammed by a locksmith or a car dealer. This could cost more than simply replacing it. Modern key fobs are protected by rolling-code encryption, which prevents thieves from getting access to your car. This means that locksmiths must have a special programing tool that is only available to the car manufacturer, which increases the cost. In the majority of cases, the whole service will be billed at once. This includes any costs to reprogramme a new keyfob. Depending on the vehicle, that can run from $20 at some stores to $200 or more at a car dealership.