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How to Repair a Car Key Fob The key fob you have is likely to be jostled a lot. This can cause its buttons to get stuck or break. You can try giving it a once-over and swapping out the battery, if needed. The majority of cars have the coin-style battery, which you can purchase at big box stores, home improvement retailers and pharmacies. Some models require programming equipment that is available only to dealers. Dead Battery The car key fob is a compact and handy little device that makes getting into your vehicle and launching it easier than ever. But what happens if you press the button a few times and your car isn't responding? The most frequent reason for this is the battery is dead. The battery can be easily replaced. You can find replacements at auto parts stores, supermarkets and even some home improvement stores. Other features offered by the key fob might not function. It could be due to a mechanical problem or an electrical issue inside the car or even a problem with deprogramming in the car's receiver. In these cases it is recommended to call an expert. The majority of manufacturers include a mechanical slot on the fob to be used in case of a dead cell. In most instances, a cover is attached to the handle of the fob to hide the key slot. The physical key can be inserted into the slot, which will allow you to unlock your door and start your vehicle. Make sure to insert the key fob back into the slot once you've started the car. If you have a Ford equipped with SYNC Connect, you are able to start the car using the key fob. Most of the SYNC Connect equipped Ford vehicles have an additional “E-blade” within the cupholder. It is a mechanical key that can be used to press the starter button, should your key fob not be able to start the car. To get the most benefit of this feature, ensure that the battery in your car is charged and go through the owner's manual to learn what the procedure. If you're having problems with your car after changing the battery on your key fob, it may be time to call a locksmith or your dealership to have the battery replaced or the fob repaired. In some cases, the key fob can be programmed into your car by replacing the battery at the dealership or at selected Interstate All Battery Center locations. However, this is only possible in the event that the circuit board and antennas have not been damaged. Damaged Buttons Over the course of time the car key fob's buttons are bound to be subjected to a lot wear and wear and tear. They are prone to dropping and are often sat in pockets and purses. The jolting could cause internal components to loosen or become damaged, leading to them not responding when you press them. A few simple steps can usually solve this issue, but occasionally, you might need to take your fob to a professional locksmith. Apart from an inoperable battery The most frequent reason why a key fob for a car will not work is because it requires new batteries. These tiny coin-shaped batteries can be found at most hardware stores and large-box retailers. They are inexpensive. You can also find videos explaining how to replace the battery for your key fob on YouTube or in your owner's guide. However, it's important to be aware that some key fobs require a particular procedure to enter the programming mode needed for changing the battery. In these instances you'll have to consult the owner's manual or an authorized auto locksmith to make sure you're following the correct procedure. Leaving how to repair car key fob in extreme hot or cold temperatures could cause it to stop functioning, especially when the battery has failed. If this happens, you'll need to contact an automotive locksmith or dealer to purchase a new fob. If how to repair car key fob on your key fob remain unresponsive, it could be that 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 remedy this issue by removing the key fob and putting the metallic tape over the worn out contacts. It's important to remember that certain key fobs are extremely tricky to open and cannot be opened with confidence without the right equipment that is only available at a dealership. If you try to open yours using a screwdriver or another tool it's likely that you'll break the circuit board inside, and incur a more expensive repair bill than you might have otherwise needed. Circuit Board Issues If your key fob is able to unlock your car's doors and start your engine however, it's not functioning as far away as it did previously, the problem may be with the circuit board. The circuit board is an electronic chip within the case. It transmits signals to the car telling it that you want to close the doors, lock the trunk, or turn off the ignition. If the circuit board has been damaged, your keyfob will not be able transmit these signals. Repairing damaged circuit boards by yourself if you have some technical knowledge. Start by removing the battery and taking the rubber button and holder assembly from the circuit board. Clean the plastic frame and contacts with rubbing alcohol and a cotton swab. This should eliminate any rust that blocks the circuit board to transmit signals. Once you've reassembled the key fob, be sure it can enter its programming mode. Usually, this requires turning it on and off several times, so check the owner's manual for specific instructions. Many vehicle manufacturers have videos online that demonstrate how to accomplish this. If you're not confident enough to do it yourself, you can bring your key fob to a locksmith who specializes in your vehicle's model. Certain key fobs that are newer have a built-in receiver that enables you to unlock your trunk and open the doors, and also turn on your ignition and start the engine from a distance. In general, they are more reliable and operate over a greater range. If your key fob does not work as far as it used too, it may have an internal issue that isn't working or an antenna that isn't functioning properly. If you're unable to get your key fob to function the most likely reason is a dead battery. It's cheap and simple to change. However, if the fob's buttons or circuit board are damaged, you'll need have it professionally repaired and changed to a new program. Many dealerships will provide this service but you can also find a service that specializes in the model of your car. Forgotten Key It can be an absolute nightmare if you lose the car key fob. It's possible to turn your home upside down by retracing all your steps and looking everywhere. This includes in bags, drawers and under couches. In the end, you'll find it. But the best way to ensure you don't lose your key fob is by taking preventative measures. If you're prone to forgetfulness or have a slight hint of ADD Make multiple copies and hand them out to your family and friends so that you won't be sweating and cursing for four hours should you lose your key fob. Most cars have key fobs that let you lock and unlock your doors. You can also, in some cases, set off the alarm or open the trunk. Some of the more advanced models offer even cooler features like the ability summon your car by pressing a button. This feature isn't available in all models, but if you have one of the cars that can do it (Genesis GV60 and Hyundai Sonata are two examples) This is an amazing feature to have. If you have an extra car key fob programmed for your vehicle, you may use it in the event you lose your original. You can also get in touch with an automotive locksmith to make a key fob that is programmed to your vehicle. Talk to your dealer to find out whether a replacement keyfob is available at a lower price. If you don't have a spare key the only method to start your car is to call an auto locksmith to come out and cut a new one or replace your current key fob with an empty. Dealers are also able to do this however they'll need your car to be towed as well as proof of ownership. But the good news is that these services are fairly affordable, particularly when compared with getting a new replacement key from your dealer, which can cost $200-$250.