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How to Fix G28 in a small, handheld device. These functions can include locking and opening your car to re-starting it at the touch of a button. Keeping your smart keys in good working condition is vital. You can replace the batteries yourself if you notice they are low. Unlocking A lot of us use key fobs as a convenience but it takes a second to realize how useful they are. These handheld devices unlock our cars and enable remote-start systems. These devices also help protect us from theft, since they emit a unique number when connected to the antenna of the car. The simple key fob is a great invention but it can be a hassle when it fails. The good news is, just a few simple fixes will often bring back the functionality. Many car manufacturers provide do-it-yourself (DIY) key fob programming instructions in their owner's manuals. The procedure is usually relatively easy. Some automakers offer this information on their websites. Before you start the process, it's best to have an additional fob or key available particularly if the one you have been lost. If you haven't already done so, purchase an additional key and program it and keep it in a secure location. If you're trying to reset your smart key take a step away from the vehicle and walking few feet before returning to the driver's seat and trying again. Most smart fobs can be programmed by connecting them to a computer or smartphone and using the software that is available on the majority of automotive manufacturers' websites. If you're unable get your key fob to work following the manufacturer's instructions or instructions, contact your local dealer for assistance. It is crucial to select a high-quality battery for your smartkey. The batteries that are not of the highest quality will last less and can drain too quickly. To prolong the life of your smart key, you should replace the batteries frequently. Before you take out the old batteries, you should read the manufacturer's handbook and choose the replacement that is compatible with your model's unique requirements. Many smart keys are pre-programmed to have settings that automatically adapt to the preferences of the driver. If the key fob is detected by the vehicle, for instance the vehicle can adjust the seats and mirrors to the proper positions. You can also set up temperature control settings, preset radios, and speed limits for specific keyfobs, to ensure that they are not used by anyone else. Some Chevy and GMC vehicles allow you to fold the side-view mirrors wirelessly by using the key fob. This is useful in situations where you have to maneuver into a tight space. To enable this feature, hold down the lock button on the key fob for 10 seconds. If you're in the market for a new car, ask dealerships about this and many other cool key fob features. Starting Key fobs are used to unlock your vehicle and activate your car alarm. Certain key fobs can be used to start the engine, and even manage other vehicle features such as air heating or air conditioning. The remote-start capability makes the key fob an essential accessory for any car. It is especially useful in areas where using traditional keys could be risky or difficult. Many of us have a difficult time remembering to turn the ignition key to start the car, especially when we're in a hurry or distracted. The panic button on key fobs can be an answer to this problem. Pressing the fob's panic buttons activates your vehicle's emergency alert system that blasts your horn, emitting a loud siren to disorient potential thieves. Key fobs have been extremely popular in recent years. They're small and easy to use and can serve many functions. Although they're not as convenient as traditional keys, many people are happy to trade an inch of size for the convenience of having their car at their fingertips. Smart fortwo isn't a new addition to the trend of using key fobs that come with a traditional metal key and an integrated fob unit. Model 3 can be operated by pressing the key fob button or tapping the touchscreen. The key fob can also serve as a backup your phone fails to work or is out of battery. Key fobs work with only one Model 3 at a time but they can be re-paired with a different Model 3 if you authenticate it once more (see the section Managing Keys). After you've successfully repaired with a key fob, or card, its name will be displayed in the list of keys. By touching the pencil icon, you can personalize the name of any key fob that's been authenticated. If your key fob isn't working, a message appears on the touchscreen, indicating it is required to be reprogrammed or replaced. Follow the instructions in your manual to gain access to the key's battery compartment and remove it. You can replace the battery yourself by following these simple steps: Place your key fob with its button facing down on a smooth surface and gently lift the cover away from the retaining clips. Avoid touching the flat areas of the battery since fingerprints can decrease the lifespan of the battery. Coin cell replacement batteries CR2016 are available from all major retailers and auto parts stores. Select a brand that offers an assurance against dead batteries.