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Car Key Fob Repair – How to Get Back on the Road Even If Your Keyless Entry isn't Working Key fobs can experience problems over time, including a loss of functionality. Some issues may need professional attention, but many can be resolved at home. The first step is typically to change the battery. The majority of fobs have flat watches that are easy to find at auto parts stores. Dead Battery If the battery for a key fob fails, it can be a major inconvenience particularly if you're away from home. There are solutions to get your vehicle back on the road in case your keyless entry system isn't working. The first thing to test is if the buttons on the key fob still work. If they do, the issue could be with the car's locks instead of the fob. If your keys will not unlock, you may find an electronic slot in the trim around your door handles or in other places on your vehicle (consult the owner's manual). Insert the mechanical key, and try again. If this doesn't work, some cars have an app that can unlock doors remotely. FordPass Connect MyChevrolet Mobile App, myMazda apps, for example allow owners to open their doors with their smartphones. However, these apps require a monthly fee. You should also make sure that your key fob isn't draining your car's battery by resting on it. A dead fob can drain your battery fast especially if it's used to control your phone or TV while you're watching. Holding the key fob up to your car's start button can sometimes start a key fob with low battery. This simple fix could save you from a trip to your dealer or certain Interstate All Battery Centers. If your key fob doesn't work try testing it in a vehicle that has an ignition button. If it fails, the fob battery probably requires replacement. It's a good idea keep a spare key fob in your purse or backpack. Damaged Buttons It's possible that your key fob is damaged and has a button. Your key fob contains an electronic circuit that has “contact pads” which are covered by an electrically conductor film. The film wears off over time. This wear could cause your device to respond slower or not at all. The good news is that the pad in the key fob of a car can be replaced easily, and is done using a simple flathead screwdriver. If the key fob is severely damaged or broken in any way, it might be more difficult to open up the case, and you'll be required to take the fob to an auto repair shop for repairs. It's not unusual for a key fob to be dropped on hard surfaces, trodden on or exposed to water. All of these incidents can cause physical damage, such as bending and snapping the keys. This could also cause internal damage to the fob, which could result in a malfunction. This is why it's recommended to keep an extra key fob in your pocket or wallet in case you break the one you already have. Make sure the battery is charged first if your key fob buttons aren't responding as they should. Key fobs don't require an electronic device. They utilize the same battery for two dollars that is used in hearing aids and watches. The batteries are available at drug, hardware, and online stores. If the battery is working, it's likely that the buttons are dirty or worn down and can be easily cleaned by using a damp cloth to wipe them clean. If the buttons still don't work, try an alternative car key fob. This will help determine if the problem is yours or an specific model. If the other fob functions it's likely that your key fob needs to be reprogrammed, or perhaps replaced entirely. Reprogramming The hidden world of car keys fobs is more complex than the myths that surround it suggest. Basic fobs function with radio frequency signals that are specific to each car. The fobs must be programmed correctly to unlock and start the car. Unfortunately the process of reprogramming a fob isn't as easy as pressing a few buttons and with a few exceptions, it has to be done by the dealer. Check the owner's manual for more detailed instructions. Some manufacturers, such as Mercedes have their own proprietary technology that guarantees only dealers can create an entirely new fob and then sync it to your vehicle. However certain independent shops offer this service as well, so be sure to look up reviews and prices prior to choosing the shop. Certain car models erase other fobs after they've been programmed, meaning you'll need any additional fobs professionally programmed as well. This can be costly particularly if your fob has stopped working. It is always advisable to have at minimum a backup mechanical key that you can use to unlock the trunk and doors, even if it won't start the car. Be prepared for a difficult experience if you choose to reprogram your fob yourself. You'll be disappointed with the countless online guides that promise success. Many of these guides were written by people with no experience and are based on unsubstantiated statements. Some of them even state that you can program your own car key fob in just a few clicks, which is very confusing. Most key fobs are secured by a plastic clip which is easy to remove, but the battery is inside the circuit board, which means you'll need to carefully pull it out using a tool. Once you get inside, you'll be able to find the button cell battery which is typically a small watch battery that can be purchased at most pharmacies or home improvement stores. It's usually simple to replace the battery. Before replacing the whole unit, it's worth trying first. Replacement If a car key fob has been damaged or fails to function, it's important to know that there are a few ways to address the issue. An easy fix could be as simple as replacing the battery or reprogramming the key fob, but a more thorough repair may be needed. car keys repairs can also be helpful to have a spare key fob in case one is lost or stolen. The majority of modern key fobs have an incredibly small physical key, in addition to the electronic component which makes them more expensive and more complex to replace than traditional keys. Some “smart” fobs even come with a remote starter. It's therefore important to be aware that it can take up to an hour to get a new key fob cut and programmed to your vehicle. Fobs communicate with the car receiver using a small radio transmitter that is mounted on circuit boards. By pressing a button, the transmitter transmits an RF signal that is unique to the car's receiver. The receiver recognizes the signal and verifies it against preprogrammed codes. This allows the driver to start the car from a distance, without the need to insert the ignition key in. If the buttons on the fob you have purchased fail to respond or work sporadically it could indicate that they have been damaged by water or other factors. You can fix the fob by taking it apart and check for damaged or non-responsive buttons. If this doesn't solve the issue, try reprogramming the fob or getting another one. It is best to check with an auto dealer in your area or a locksmith prior to buying a replacement keyfob on the internet to ensure it is compatible with the security system of your vehicle. You can find aftermarket fobs less expensive, but it's crucial to research the brands and read reviews prior to attempting to program them. While some fobs are able to be replaced by a reputable locksmith others require specialized equipment to program them that can only be used by a vehicle dealer or auto technician.