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How to Replace a BMW Key The replacement of a BMW key is expensive. BMW keys are highly-technical, and must be reprogrammed in order to work with the vehicle. Purchasing a new BMW key online will save you money, but it is crucial to find an online retailer that is specialized in car keys and has positive reviews. It's also recommended that you visit a dealership to make sure that your new key is properly programmed. Smart Keys Keys Many new BMW models come with the smart-key system that lets you unlock and lock your vehicle with just a click on the steering wheel. Certain models also come with remotes that allow you to start the engine and shut the windows and sunroof from the distance. These keys feature radios for locking and unlocking as well as infrared (IR) to communicate with the dashboard. The IR circuit creates an infrared bridge bidirectional that transmits commands to and from the dashboard and to the receptacle within the key. This allows the key to control the car from a few meters away. The key also has an RF coil that receives the remote lock signal from the car and transmits it to the dashboard. These smart keys also store information such as mirror and power seat settings. To share access with someone, you need to connect the key to an iPhone and then follow the directions on your device. This will enable you to give them a digital key that will work for as long as your phone is powered up and within Bluetooth range. Contrary to older key fobs for cars, which transmit the same frequency repeatedly (which could impact other makes and models utilizing the same system, and could make it easier for thieves with a tech background to steal cars), modern smart keys emit a distinct encrypted signal each time they're used to open or close a door, or open the trunk. The vehicle's embedded antennas then respond by emitting a specific frequency in order to identify the key, and then unlock or turn it on. Hacking is possible but not impossible. A skilled professional could take over IR transmissions and gain access to your vehicle. Always carry a backup key, or leave your smart key at home if are going to go out to eat or shop. If you do lose your keys, be sure you have the VIN number of your BMW and a government ID in case you have to request an exchange from the dealer. Key Fob Batteries The BMW key fob is a convenient device that offers security and convenience with the push of a single button. But, as with everything that is dependent on a battery, the key fob's battery can die-often at the most inconvenient time. Fortunately, replacing the battery of a BMW key fob battery is easy and quick. To replace the key fob's battery, open the fob at the seam that connects its two halves. The backplate of the fob is secured by a an opening that can be opened using the flat-bladed screwdriver or finger. Once the backplate is removed, insert a new button cell battery into the slot. The new battery is usually designed to look like a small coin with plus and minus symbols printed on it. Place the new battery inside the fob with the same orientation as you did with the old battery, and then snap the two halves together. After replacing the battery Test it by pressing each of the fob's buttons to ensure they function as expected. Based on the model you have you may need to reconnect the key fob with your vehicle or follow other steps to ensure that it functions properly. Consult the owner's manual of your BMW for detailed instructions on how you can re-sync the key fob. A weak or dead key fob battery could reduce the range of the signal it transmits with your car, which can limit its ability to lock and unlock the trunk and doors, or arm/disarm the alarm system. It is time to replace your battery if find yourself needing to move closer to your car to unlock the doors or start the engine. It's simple to replace the battery on your key fob at home. After the battery has been replaced, it's important to test the functions of the key fob by locking and unlocking the vehicle, or putting it in the ignition. Reassemble the keyfob and then test it again to make sure that it's functioning properly. Knowing what happens when the batteries on the key fob need to be changed and how to replace them and how to start a vehicle without a battery that is dead will allow you to take advantage of all of BMW's convenient features. Slant Shaped Key Batteries BMW owners are likely to make the most of the keyless entry system as well as ignition. These features make driving your BMW more enjoyable, and they can even help you avoid some common car problems. If you aren't paying attentively to the indications that your BMW keyfob battery is running low, it will eventually run out. If your BMW key fob is dead, it's no longer able to communicate with the vehicle's computer in order to unlock or start the engine. The batteries that are found in many BMW keys can be replaced easily. The process is straightforward and typically takes an hour to complete. If you have a spare BMW key It's recommended to keep it in your pocket so you can replace the battery if it runs out of power. When replacing a BMW keyfob battery, it's important to use the correct type of battery. The smart key requires a CR2450, while the sleek slant-shaped slant-shaped Comfort Access fobs, which were available in various F series models from 2011 to 2017 require a battery CR2032. Both are available at most auto shops as well as department stores at an affordable price. Another option is to purchase an alternative key for your BMW from a locksmith or dealership. These keys are laser-cut and coded by the car's manufacturer to ensure compatibility with the keyless entry and start system. The downside is that these keys are more expensive than ones from the aftermarket and may take longer to arrive. If you're considering purchasing a replacement key for your BMW look into BimmerTech's online ordering system to save yourself time and money. Some drivers prefer to use a smartphone as an “surrogate key” to start their BMW. By using Bluetooth technology, your smartphone can connect to your BMW's keyless entry and start system. This is especially helpful during hot days, when you don't wish to carry a heavy BMW Key in your pocket. Valet Key Batteries A key fob is an effective tool, however you may sometimes run out of batteries. This could make it difficult to lock your car, and it could also prevent you from being able to turn on the engine and drive. It is easy to replace the battery on the case of a BMW keyfob. The steps may differ slightly based on the type of key you have, but they are all pretty similar. It is simple to replace the newer slant shaped key batteries with a simple procedure. You just need to press the small tab that releases the inside of the valet key which is found on either the side or bottom of the fob. The battery can be accessed with a screwdriver that is flat. After the old battery has been removed, you can put in a new one and then put it back together. It isn't easy to replace a battery in an older diamond-shaped key by a rechargeable one. These keys aren't designed to be replaced with a battery, and can be damaged if you attempt to remove the backplate. You can force it open, but you'll probably need the help of a professional. If you need to replace a battery that is old it is recommended to contact a dealership to get it done by a professional. Another thing to think about is that there are different types of BMW keys that are available. Each key fob comes with its specific driver profile, and can be paired with different drivers. This allows family members to use the same vehicle while still being able customize their driving experience. click through the next post to remember in this article is to know what kind of key you own and how to replace it. It is crucial to know this if want your car to start when you push the buttons on the key fob. This can help you avoid frustration if your key is not working properly, and it can also save you lots of money if you are not obligated to make a repair appointment at a dealership.