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How to Get a Replacement Electronic Car Key Fob Modern cars come with fobs that open doors and even start engines. Many of them have smart features, such as auto-parking, or rolling down the windows. Change the battery inside one is easy and cheap. Many online videos or owner's manuals will guide you through changing the battery yourself. But replacing a fob can be a lot more expensive particularly for high-tech versions that have advanced security features. Security features Today's key fobs do much more than unlock and start a car. Some are integrated with mobile apps and provide advanced security features, such as proximity sensors. Others have the ability to remotely lock and unlock doors as well as open trunks. They can also be used to alter the temperature of your car or even start it from a distance, which is handy in extreme conditions. In certain situations, the fob can even send a signal to your vehicle to automatically park it. The fob communicates to the receiver of the vehicle's locking mechanism by using radio signals. The transmitter inside the fob contains the code printed on a microchip. When you press the button, the transmitter transmits the code along with the function code to the receiver. If the receiver receives the expected 40-bit code it will carry out the intended function. The transmission of a key fob's signal can be affected by electronic devices and metal objects nearby, so it's important to keep the transmitter away from such items. If you're having issues with your device ensure that the buttons work correctly. If they're not, you might need to re-programme your remote according to the instructions or site of the car manufacturer. The dealer will have access to software specifically designed for your vehicle model. However, the dealership can sometimes be more expensive than an automotive locksmith who has experience in reprogramming electronic key fobs. Some key fobs are also only available at the original car dealer of the manufacturer, since they require specialized programming that only the dealer has access to. Key fobs that are specialized often come with additional features that are not included in standard models, like the remote starter and smart-key functions. These additional features however, are typically worth the higher cost. This is particularly true for drivers who want to upgrade to a laser-cut or switchblade type key which are harder to copy and provide a higher level of security. Battery life The car key fob is a convenient tool for drivers. However, they must be maintained properly in order to function properly. Sometimes, keys can not function properly or stop working, which can cause frustration and even safety concerns. The key might temporarily function again when you shake it or tap it against your hand however, replacing the battery in your key fob is the best option. This can be accomplished quickly and cheaply in a car repair shop or dealership. If the car is not able to accept the signal from the keyfob, it is among the most common indicators of a failing cell. The car may not open and the doors could remain locked. The key fob's indicator light will also be less bright or flash more often, which is a clear indication that it's time to replace the battery. Other indications of a defective key fob battery are inconsistent and delayed signal reception. If you have to press the key fob several times before your vehicle responds, then it's time to replace the battery. Certain fobs require multiple presses to start the engine. Therefore, it is important to pay attention to this indicator when using the key fob. Another method to determine when it's time to replace the battery is to search for a “talking” fob. The car will tell you whether the fob is in its range, and will continue to communicate with the vehicle even when the key is in your pocket or purse. This constant communication will drain your battery. Even for the same year, model and model of car, key fob batteries may differ. The inside of the case may differ from one manufacturer to another. Certain key fobs, for instance, feature a notch that allows you to open them. Others are designed to be opened by force. Key fobs that are forced to open may cause damage to internal components, and could require replacement. When you are removing the fob battery, ensure that you employ a tool that is able to penetrate the shell without damaging it. The flathead screwdriver is a good choice. Do not over-tighten the screwdriver or apply too much pressure. If you do, the fob may break and scatter pieces across your living room. Once the battery is replaced the fob must be put back together and tested to make sure it works correctly. Programming The majority of modern cars have keys that lets drivers unlock the car and start it up without having to put the physical key in the ignition. While they're handy but they're not indestructible, and can often break or stop working after a few years of being tossed around in pockets and purses. Fobs can also be pricier than traditional keys and require special programming to work with a vehicle's security system. There are many ways to replace these expensive gadgets if they stop working. Batteries are available at big-box stores and hardware stores. They cost about $10 and can be replaced in a matter of minutes. Some models only require one battery while others need two. Owner's guides and online videos explain how to remove the battery from a key fob. Press any button on the key fob to check if it's already in programming mode. Enter the security code for your vehicle and follow the on-screen instructions to connect with a new key fob. This step is important to ensure that you don't erase all the other fobs in your vehicle. Some vehicles can be programmed to use the onboard key fob pairing system, which uses a smartphone app and a special USB cable to pair the key with the vehicle. This is less expensive than buying a dealership key however, it does require a computer with the right software and internet access. Some mechanics offer this service at a fee. However replacement car key fob cost 's not always possible for older cars. Some key fobs are self-programmable that means you can do it yourself, without the need for an expert or specialist equipment. The process varies by vehicle, but it generally involves turning off and on the car and pressing the fob's buttons within a predetermined time period. The vehicle will respond by turning off the door locks or emitting the sound of a chime. If the process fails then try a different key fob or battery. If the fob is in bad battery or is broken it can be fixed by removing it from the keychain. Make use of a flathead mini screwdriver to pry the two halves of the fob apart. Replace the battery with a brand new CR 2032 3V battery and carefully reassemble the unit. Dealerships Replace the battery in case your car's fob doesn't respond to button presses. It's a cheap fix if you're careful not to choose the wrong replacement part, which can cause the fob to stop functioning completely. If you have replaced the battery, and the key fob in your car does not start, you could have a different issue, such as corroded connections or damaged pads on the buttons. In this scenario you'll need to go to your local dealership for help. You will need to know the type of key fob that you have. This will determine the cost to replace and the time it takes. It will also affect whether you'll save money by visiting the dealership or purchasing an aftermarket key fob. Plastic casings with buttons that unlock doors or arm alarms were the simplest key fobs that became popular in 1990s. Some key fobs have a metal blade inside and some look like switchblades. To turn the motor on you have to insert the key made of metal into the ignition. Newer cars feature a more advanced type of key fob, referred to as smart keys. These keys are similar to the older keyless entry remotes, except they come with a transponder chip that connects to the vehicle's immobilizer system. This chip is an element of security that blocks unauthorized users from starting your car. The fob is also programmed to respond to the commands of its owner which means that your car will not respond to any other key that tries to operate it. Smart keys do not work with aftermarket replacements. To replace one, you'll have to visit a dealer or purchase the original fob from the manufacturer. Depending on the model of your car and the manufacturer, the dealer will charge for programming the new key, which may take as long as an hour. It can be difficult to find an individual dealer who can sell replacement key fobs if you've lost it. However, you can save money and avoid the hassle by visiting an area Interstate All Battery Center to get an aftermarket replacement for the key fob in your car. They're almost exactly the same as the originals, however, they're much cheaper. They're also a great choice for adding a spare without paying dealer prices.