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Key Fob Replacement and Repair The key fobs in modern cars are very efficient and are subject to a lot of abuse. Sometimes just a simple replacement or repair is all that's required to get them back in good working good working order. Most fobs use flat watch-style batteries, which are readily available in auto parts retailers. However, before calling an expert, you can try a few DIY fixes! Dead Key Fob Batteries The battery for the key fob power the remote function of your car. It also, with push-to start vehicles, permits it to start your engine. It is therefore essential to maintain a functional healthy and a good battery. When you're on the move, a dead key fob can be a huge problem. The good news is that a simple, inexpensive replacement can be made to fix it in a short time. The loss of range and signal strength are among the most common indications that a battery on a keyfob is dying. You may also notice that the buttons on your fob do not work or require extra effort to turn on. A new key fob is available in the auto part section of a major retailer or on the internet. They are typically CR2032 and CR2025 and are sold in packs of 2 or more. Make sure to consult your owner's manual prior to you shop for the right battery. Certain vehicles require a certain size or type of battery that isn't always available at big-box retailers So, make sure you know the specifications prior to you buy. The battery is usually located at the back of the key fob. It is removed using the flat-bladed screwdriver, by removing the case. It is likely to look like a small coin and be marked with the battery's size. Be sure to note which way the plus and minus symbols are positioned to ensure that the new battery is properly placed. Once the battery replacement is installed, gently snap the two pieces of the fob together and test each button to make sure they function. If your key fob isn't working after replacing the battery, it could be deprogrammed. In this instance you'll have to contact a locksmith for help, 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 is damaged or if the battery has failed. Set up an appointment to review all of the services we offer in your local 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 an indication of a problem with the signaling. Your car and key fob rely on radio signals to communicate, so weak or inconsistant signals can cause poor range and performance. One of the first things to determine is if the battery of your fob is depleted, as this can significantly affect the sensitivity of your signal. It's also worth resetting the settings of your fob and help get a more consistent response from the car. The procedure varies from vehicle to vehicle, so the owner's manual or a call to the helpline of the manufacturer is likely to be the best source of information here. Other factors can cause weak fob signals, for example, interference from other devices operating at the same frequency as your key fob. Other key fobs as well as wireless communication devices may interfere with the RF (radio-frequency) signals your key fob transmits to connect to the vehicle's receiver. Finally physical damage to your key fob can also interfere with the transmission of RF signals which could result in a decrease in range and performance. A blown fuse, broken or cracked button or a bent case on the fob could affect signal transmission and cause the remote not to function properly. There are a few simple steps you can follow to try and fix the problem of weak fob signals such as resetting the fob's settings, or replacing the battery. If your fob is old and worn out, it's the time to replace it all over again. Don't forget to utilize the spare remote that came with your car in the event that your primary remote starts to fail. You should try this solution first to see if it can solve the issue prior to buying a new remote. In this situation, it might be an appropriate time to consult a professional auto-locksmith. They'll be able to diagnose the problem and suggest the most effective solution. Physical Damage It's not unusual for key fobs to experience issues from time-to-time. Fortunately, most of these issues aren't difficult or complicated and can be resolved with some simple steps. It's a good idea to keep spare batteries or a different fob in case your key ceases to work. A dead battery is the main cause of a car keyfob not working. These tiny devices are powered by lithium-ion buttons or coin cell batteries. They can be replaced and can be purchased at most pharmacies and grocery stores. You can open your fob's casing using a flat head screwdriver and gently pull out the battery that is in there. Replace the battery, making sure it's not damaged or loosened. Most fobs require CR2032 batteries. However, yours may require a different type. The fob may not be responding to buttons if it loses its connection with your car. This can happen due to a number of factors, such as changing the batteries, however it is generally simple to get an auto Locksmith or your local dealership to fix. Try this trick to fix your fob in the event that none of the above methods work: disconnect the battery from both the car and the fob for around ten minutes, then reconnect them in a reverse order. This could trigger a reboot within the system, and in some cases this will fix the issue without requiring any of the other steps. Keep the fob clear of water or other sources of damage while playing around. The fob is quite sturdy, but you need to treat it with care if you want it to last as long as possible. If none of the troubleshooting steps above work you, you may have to replace your key fob. If it has been dropped and trampled or exposed to harsh environmental conditions, it could not be repairable and will need a replacement. If this is the case, you should be sure to look around for a deal prior to making your final decision. Lost Fob Even with the best of care it's a fact in life that car key fobs will sometimes fail to function. If yours is lost, it could be a huge expense to replace it—especially if you don't have a spare. “You could end up paying $50 or more to purchase a new replacement from the dealer and then have it programmed, and a new mechanical backup which could cost you at least another $100,” says Mel Yu who is an automotive analyst at Consumer Reports. A weak battery is among the most frequent reasons for a keyfob's stop working. If you are familiar with how to change the battery, or if your owner's manual contains instructions, you can attempt it yourself. If remote key fob repair doesn't work you'll have to call an expert. A locksmith is capable of helping you locate your lost fob or get it replaced. They'll also have a good idea of why your fob stopped working in the first place. If your car is an older model that has no smart technology built-in, you can save some money by finding the key number plate on your existing mechanical backup key (it's usually hidden behind a decorative keychain) and recording it in a safe place—such as your wallet or on your phone. If you need to reprogram your car's key fob, the locksmith can perform the task more easily. If your key fob is an older smart key, it'll need to be deprogrammed by a locksmith or dealer. This could cost more than simply replacing it. Modern key fobs are protected by encryption using rolling-codes which stops thieves from getting access to the car. That means that locksmiths need a special programing tool that only the car manufacturer is equipped with, which adds to the overall cost. In most instances, the entire process will be charged once. This includes any costs for reprogramming a new keyfob. Based on the car, that can run from $20 at some stores to $200 or more at a dealership for cars.