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How to Repair a Car Key Fob Your key fob is likely to be jostled a lot. This can cause its buttons to get stuck or damaged. You can try giving it a once-over and swapping out the battery if you need to. Most cars use batteries that look like coins. You can buy at pharmacies, big box stores and home improvement stores. However certain models require specialized programming equipment that is only available to dealers. Dead Battery The car key fob is a small and useful device that makes entering your vehicle and starting it easier than ever. What happens when you press the button a few times and nothing happens? The most common reason for this is the battery is dead. Luckily, you can try this out is simple to replace. You can purchase replacements at auto parts stores and supermarkets, as well as some home improvement stores. However there are other features that the key fob has may not function. This could be because of mechanical issues or an electrical problem inside the vehicle or even a deprogramming error in the receiver of your car. In these cases you should definitely consult a professional. Most manufacturers include a mechanical slot in the fob for use in the event of a dead cell. Most of the time the slot for keys is concealed behind a cover on the fob handle. The key's physical form can be put into the slot which will allow you to open your door and start your car. Make sure to insert the key fob back into the slot after you have started your vehicle. If you have a Ford equipped with SYNC Connect you can also start the car by using the key fob. The cupholder on the majority of Fords with SYNC Connect has a backup “E blade”. This key is used to push the starter button in case your key fob isn't able to start the vehicle. To make the most effective use of this feature, make sure the battery is charged. You can also refer to the owner's manual to find out how to do it. If you're having problems with your car after replacing the battery in your key fob It could be the right time to call a locksmith or your dealership to get the battery replaced or to repair the fob. In some cases the key fob could be programmed to your car with a new battery from the dealership or at select Interstate All Battery Center locations. But this will only work in the event that the circuit board and antennas have not been damaged. Damaged Buttons Through the course of time, your car key fob's buttons are likely to be subjected to a lot wear and wear and tear. They are prone to dropping and are frequently in purses and pockets. This could cause internal components to become damaged or loose, which will cause them to not respond to your press. A few simple steps can often resolve this issue, however occasionally, you might have to take your device to a professional locksmith. In addition to an inoperable battery, the most common reason a car key fob can't function is because it requires new batteries. These tiny coin-shaped batteries can be found in a variety of hardware stores and large-box retailers. They aren't expensive. You can also look up videos on YouTube and in the owner's manual of your device that explain how to replace the battery on your key fob. It's important to note that some keyfobs require specific steps to enter the appropriate programming mode to change the batteries. In these instances you'll need to refer to the owner's manual or an authorized auto locksmith to make sure you're following the correct procedure. The fob you have left in extreme cold or hot temperatures could cause it to stop working particularly in the event that the battery has gone out. If this happens, you will have to call an automotive locksmith or a dealer for a new fob. If your key fob's buttons remain unresponsive it could be because the contacts inside are worn out. These contacts are rubber-like and coated with an electricity-conducting film, but they can start to wear out over time due to repeated use. You can try to solve this issue by taking the key fob apart and putting a piece metallic tape over the worn-out contacts. It's important to note that certain key fobs can be extremely tricky to open and can't be opened safely without the use of specialized equipment only accessible at a dealer. If you try to open it using the use of a screwdriver or other tool, you could end up damaging the internal circuit board. This could lead to a much more expensive repair bill. Circuit Board Issues The circuit board could be the reason behind your key fob not functioning as well as it used to. The circuit board is an electronic chip inside the case that transmits signals to your car, telling it whether or not to close your doors, lock the trunk, or turn off your ignition. If the circuit board is damaged the key fob won't be able transmit these signals. Repairing damaged circuit boards by yourself If you have some technical knowledge. Remove the battery, and then remove the rubber button assembly and holder from the circuit board. Use a cotton swab and some rubbing alcohol to clean around the contacts and plastic frame. This should eliminate any corrosion that has stopped the circuit board from transmitting signals. After you've assembled your key fob, check whether it's in programming mode. Go through the owner's manual to find instructions. Many car manufacturers have videos online that demonstrate how to accomplish this. If you're not confident enough to tackle it yourself, take your key fob to a locksmith who specializes in your vehicle's model. Certain of the latest key fobs come with an integrated receiver that lets you unlock your trunk, open your doors and switch on your ignition from some distance. In general, they are more reliable and work with greater precision. If your latest key fob isn't working as well as it used to, it could have an antenna that is not working properly or other issue within the internals. The most likely reason for a key fob that isn't working is the battery is dead or not functioning properly. It's inexpensive and easy to replace. If the circuit board or buttons on the fob are damaged, they will require professional repair and reprogrammed. This service is available through most dealerships, but you can find a service specializing in your car brand. Forgotten Key If you've lost your car key fob, it can be an absolute nightmare. It's possible to turn your home upside down by retracing your steps and searching all over. This includes in drawers, bags and under couches. You'll eventually find it. Preventative measures are the best method to avoid losing your key fob. If you are prone to forgetfulness or have a slight hint of ADD, make several copies and give these to your family and friends so that you won't be shivering and wailing for 4 hours if you lose your key fob. The majority of cars have key fobs that allow you to lock and unlock your doors and in some cases, set off the alarm or open the trunk. However, some of the more advanced models come with even more exciting features, like the ability to summon your car at the touch of a button. This feature isn't available in every model however if you own one of the cars that can do it (Genesis GV60 and Hyundai Sonata are two examples) it's an awesome feature to have. The good thing is that if you have a spare key fob that's programmed to your car then you can use it to start your vehicle in the event you lose the original. You can also reach out to an automotive locksmith and request them create an entirely new key fob that has specifically programmed for your vehicle. Contact your dealer to see whether a replacement keyfob is available at a lower price. If you don't have spare keys the only way to start your car is to call an auto locksmith to come out and cut a new one or replace the current key fob with an empty. A dealer can also do this however, you'll need have your car towed in along with proof of ownership papers. But the good news is that these services are fairly affordable, especially when compared to getting a new replacement key from your dealer that could cost anywhere from $200 to $250.