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How to Fix a Smart Fortwo Key Fob A smart key fob packs a variety of nifty features into a small hand-held device. The functions include everything from locking and unlocking your car, to starting the vehicle with just one touch. Keeping your smart keys in good working condition is vital. You can easily replace the batteries yourself if they're low. Unlocking Key fobs are usually taken as a given, but it only takes a few seconds to realize how useful they are. These handheld devices allow us to unlock our cars and activate remote-start systems. These devices also help protect us, as they generate a unique code when connected to the car's antenna. While there's a lot to love about the basic key fob, it can be a bit annoying when it malfunctions. The good news is that just a few simple fixes will often bring back functionality. Many car manufacturers provide do-it-yourself (DIY) key fob programming instructions in their owner's manuals, and the process is usually quite easy. Some automakers offer this information on their websites. Before you begin, however, it's a good idea to have an additional fob or key on hand, especially if yours has been lost. If you haven't already done so, purchase an additional key and program it and store it in a safe place. If you're in need of resetting your smart key take a step away from the vehicle and walking a few feet away before returning to the driver's seat. Try again. Most smart fobs can be programmed by connecting them to a smartphone or computer and using the software that is available on the majority of automotive manufacturers websites. If you are unable to make your key fob function after following the guidelines of the manufacturer, you can contact your local dealership for assistance. It is crucial to use a quality battery for your smartkey. This is because cheap batteries are not guarantee to last, and they tend to drain too quickly. To prolong the life of your smart key, make sure you replace the batteries frequently. Before removing the batteries that are old, read the manual of the manufacturer and select a replacement that matches the specific requirements of your model. Many smart keys are pre-programmed and have settings that automatically adapt to the preferences of the driver. For example, if the key fob is detected it will cause the vehicle to adjust the mirrors and seats to their appropriate positions. You can also set up climate control settings, preset radios and speed limits for specific keyfobs in order to block unauthorized use. Certain Chevy and GMC vehicles allow you to fold your side-view mirrors remote by using the key fob. This can be beneficial in situations where you have to maneuver within a restricted space. To activate this feature, just press the lock button for 10 seconds on the key fob. If you're looking for a new car, talk to dealers about this and other cool features of the key fob. Starting As the name suggests, key fobs can be used to unlock your car, and maybe arm your car alarm system. Some key fobs allow you to start the engine, and manage other vehicle features, such as air heating or air conditioning. The remote-start feature makes the key fob a crucial accessory in any vehicle. It is especially helpful in situations where a a conventional key might be unsafe or difficult. Many of us have a hard of remembering to turn the ignition key to start the car, particularly when we're in a hurry or distracted. The panic button on key fobs can be a solution to this problem. The panic button on your key fob will trigger the emergency system of your vehicle, which will blare your horn and emit a loud siren to scare away potential thieves. Key fobs have become extremely popular in recent years. They are small, easy to operate and can perform many functions. While they're not as portable as traditional keys, a majority of people are willing to sacrifice a little size for the convenience of having their car in their hands. Smart Fortwo follows the trend and has keys made of metal and a fob unit integrated. Model 3 can be operated by pressing the key fob button or tapping the touchscreen. The key fob also serves as an alternative in the event that your phone runs out of batteries or is not available. Key fobs are compatible with only one Model 3 at a time, but can be re-paired with another Model 3 if you authenticate it again (see managing keys). After you've successfully repaired a key fob or key card, its name displays in the list of keys. By pressing the pencil icon, you can customize the name of the key fob that has been authenticated. If your key fob does not work, a message may appear on the touchscreen to indicate it needs reprogramming or replacement. Follow the steps in your handbook to access the key fob's battery compartment and remove it. smart car key reprogramming can replace the battery yourself by following these simple steps Step 1: Place your key fob's button down on a smooth surface and gently lift the bottom cover away from the clips that hold it. Avoid touching the flat surface of the battery as fingerprints may reduce the battery's lifespan. Most major auto parts stores and retailers offer replacement batteries for CR2016 coin cells. Select a manufacturer that offers a guarantee against dead batteries.