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How to Replace a BMW Key The cost of replacing a BMW key can be costly. This is due to the fact that BMW keys are highly-technical and require reprogramming to function with your vehicle. Purchasing a new BMW key online can save you money, however it is important to find a seller that specializes in car keys and has good reviews. It is also recommended to visit the dealership to ensure that your new key is properly programmed. Smart Keys Keys A lot of new BMW models are equipped with the smart-key system that allows you to lock and unlock your car by simply pressing the steering wheel. In addition, some models also come with a system that lets you start the engine from a distance and also remotely close the windows and the sunroof. These keys are advanced and use radios for locking and unlocking as well as infrared (IR) to communicate with the dashboard. The IR circuit powers a two-way infrared link which transmits commands from the dashboard, as well as to the receptacle inside the key. This allows the key to control the car from a couple of meters away. The key has an RF coil that detects and transmits the remote lock signal from the car to the dashboard. These smart keys can also be used to store information such as power seat and mirror settings. If you wish to share access to a person with whom you share access all you have to do is pair the key to an iPhone and follow the instructions on your device. This will allow you provide them with a key that works when their phone is connected and within Bluetooth range. Modern smart keys, unlike older car keys that transmit the same frequency repeatedly (which could affect cars using the same system, making it easier for criminals with tech skills to steal cars) they transmit a different encrypted message each time they are used to open or shut a door or pop out the trunk. The antennas in the vehicle respond by generating a corresponding frequency in order to recognize the key, and then unlock or turn it on. Smart key systems can still be vulnerable to hacking, however. An experienced professional can be able to intercept IR transmissions and gain access to your vehicle. Always keep a spare key in your vehicle, or leave your smart key at home when you plan to go out to eat or shop. If you lose your keys, make sure to have the VIN number of your BMW and a government ID in case you have to request a replacement from a dealer. Key Fob Batteries The key fob is a crucial feature of the BMW driving experience, providing security and convenience at the press of a button. The battery of the key fob could also go out of service, as with any device powered by a battery. This occurs at the worst time. It's easy to replace the BMW key fob batteries. Open the fob along the line which connects the two halves. The fob's backplate is held in place with the notch that can be opened using a flat-bladed screwdriver or a finger. Once the backplate is removed, place a brand new button cell battery in the slot. replacement bmw key fob is likely to appear like a small coin, and will have plus and minus signs printed on it. Insert the new battery in the same way as the previous one, then snap the fob's two halves back together. After replacing the battery, test it by pressing the fob's buttons to ensure they function as expected. Based on the model, you could have to re-sync your key fob to your vehicle or take additional steps to ensure it works correctly. If you have to update the sync of your key fob, consult the vehicle's owner manual for detailed instructions specific to your BMW. A weak or dead battery for the key fob could reduce the range of the signal that communicates with your vehicle, limiting its ability to lock and unlock doors and trunk and arm/disarm the alarm system. It is time to replace the battery if you discover that you must 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 is important to test the key fob's functions by locking and unlocking the vehicle, or placing it in the ignition. Then, reassemble the key fob and test again to make sure it functions properly. By understanding the time when a key fob's battery requires replacement, knowing how to change the battery, and also how to start your vehicle with the battery of your key fob that is dead, you will be well on your way to enjoying the BMW's convenient and secure features. Slant Shaped Key Batteries If you're a BMW owner, then you take a lot of advantage of the keyless entry and ignition features. These conveniences make driving your BMW much more comfortable and can help you avoid some common car problems. If you aren't paying attention to the indicators that your BMW keyfob battery is running low, it could quickly go out. If your BMW key fob is dead, it's no longer able to communicate with the vehicle's computer to unlock or start the engine. The battery in most BMW keys can be replaced easily. The procedure is simple and takes only minutes. Keep a spare BMW in your pocket to replace the battery when it is exhausted. When replacing the BMW keyfob battery, it's important to use the correct type of battery. A smart key will require the CR2450 battery, whereas the Comfort Access and sleek slant-shaped fobs used in many F-series models between 2011 and 2017 will require the CR2032 type of battery. Both types are available at many auto shops as well as department stores at a reasonable price. A locksmith or BMW dealership can also provide you with a replacement BMW key. These keys are laser cut and coded by vehicle manufacturers to ensure compatibility with keyless entry and start systems. The downside is that these keys are more expensive than ones from the aftermarket and may take longer to arrive. If you're interested in getting an additional key for your BMW you should consider BimmerTech's online ordering system to save time and money. Some drivers prefer using a smartphone as an “surrogate key” to start their BMW. Smartphones can be connected to the keyless entry and start system via Bluetooth technology. This is particularly useful on hot summer days and when you don't want to carry a heavy BMW Key in your pocket. Valet Key Batteries Key fobs are useful device however, sometimes you might be unable to recharge your battery. This can make it hard to lock your car, and also stop you from being able to turn on the engine and drive. It is easy to replace the battery in the case of a BMW keyfob. The steps will differ based on the kind of key, but they're pretty similar. The latest slant-shaped key batteries are easy to replace with simple steps. You just need to press the small tab that opens the inside of the valet key which is found on either the bottom or side of the fob. You can then use a flat screwdriver to remove the access port that conceals the battery. After removing the old battery and replacing it with a new one. Then put everything back together. It can be a challenge to replace a battery on an older diamond-shaped key by rechargeable ones. Unlike the slant-shaped keys, they are not designed to be replaced and can be damaged if you try to pry off the back plate of the key. You can force it open but you'll likely need to hire a professional. It is advised that if you require to replace the battery, you contact an auto dealer for help from a professional. BMW keys are available in different styles. Each key fob comes with its individual driver profile and can be linked to different drivers. This allows family members to use the same vehicle and still be able to customize their driving experience. This is a crucial article since you need to know what type of key you own and how to replace that key. This is vital if want to ensure that your car will be able to start when you push the buttons on your fob. This can help you avoid frustration when the key isn't working correctly, and can also save you a significant amount of money if you're not obligated to pay for a service appointment at an auto dealership.