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How to Replace a BMW Key Replacement of a BMW key is costly. BMW keys are highly-technical, and must be reprogrammed in order to work with the vehicle. A new BMW key online could save you money, however it is important to find a vendor that specializes in keys for cars and has excellent reviews. It is also recommended that you visit a dealership to ensure that the replacement key is properly programmed. Smart Keys Today, many of the latest BMW models come with a smart key system that allows you to lock and unlock your car with a simple click of a button on the steering wheel. In addition, some models come with a feature that lets you start the engine from a distance, and also remotely close the windows and sunroof. These advanced keys make use of radio to lock or unlock and infrared technology to communicate with the dashboard. The IR circuit powers a two-way infrared link that sends and receives commands from the dashboard, as well as to the receptacle inside the key. The key is able to control the car even from a distance of a few metres. The key is equipped with an RF coil that picks up and transmits the remote signal for locking from the car to the dashboard. Info have the ability to store information like mirror and power seat settings. If you'd like to share access to a friend all you have to do is pair the key with an iPhone and follow the prompts on your device. This will allow you provide them with a key that can be used as long as their phone is connected and within Bluetooth range. Modern smart keys, in contrast to older car key fobs that broadcast the same frequency over and over again (which could impact cars that use the same system and make it easier for cyber-savvy criminals to take cars), broadcast a different encrypted message each time they're used to open or close doors or open the trunk. The vehicle's embedded antennas then respond by emitting a specific frequency in order to recognize the key and unlock or start it. Hacking is possible but it isn't impossible. An experienced professional can be able to intercept IR transmissions and gain access to your car. To safeguard yourself, keep a backup key in your vehicle or make sure to keep the smart key at home whenever you go out to eat or out shopping. If you lose your keys, make sure to keep the VIN number of your BMW and a government ID in case you need to obtain an exchange from the dealer. Key Fob Batteries The BMW key fob offers security and convenience with the click of a button. But, as with everything that relies on a battery, the key fob's battery is prone to dying at the worst possible time. It's simple to replace the BMW key fob's batteries. To replace the battery in the key fob you must open the fob at the seam connecting its two halves. The fob's backplate is usually secured by a notch which can be opened with either a finger or a screwdriver with a flat blade. Insert a new button-cell battery in its place after taking off the backplate. The new battery is usually shaped as a small coin and has plus and minus symbols printed on it. Inject the new battery into the fob with the same orientation that you did when inserting the old battery and then snap the two halves together. After replacing the battery Test it by pressing the buttons on the fob to ensure they function as expected. Based on the model of your car you may have to reconnect the key fob with your vehicle, or follow other steps to ensure proper operation. Check the owner's manual for your BMW for specific instructions on how to sync the key fob. A weak or dead battery for the key fob can decrease the range of the signal that communicates with your car, limiting its ability to lock and unlock trunk and doors, or arm/disarm the alarm system. If you notice that you are required to stand closer and closer to your vehicle in order to access the key fob to unlock or start the engine, it is likely time to replace the battery. Change the battery of the key fob is a simple job that can be completed at home. Once the battery is replaced it is crucial to test the key fob's functions by locking and unlocking the vehicle, or inserting it into the ignition. After that, reassemble the key fob, and then test it again to ensure it works properly. Knowing when the key fob's batteries require replacement, the best way to replace them, and how to start a vehicle with a dead battery will allow you to take advantage of all of BMW's features. Slant Shaped Key Batteries BMW owners will likely make the most of the keyless entry system as well as ignition. These features make driving your BMW much more comfortable and could help you avoid some common automotive problems. If you're not aware of the signs that your BMW key fob battery is dwindling it will soon run out of juice. If your BMW key fob is dead and is no longer able to communicate with the computer in your vehicle to unlock or start the engine. Fortunately, the batteries in the majority of BMW key fobs can be replaced relatively inexpensively. The procedure is easy and typically takes only an hour to complete. Keep an extra BMW in your pocket to replace the battery when it runs out. When replacing the BMW keyfob battery, it's important to use the correct kind of battery. The smart key requires a CR2450, as do the sleek slant-shaped, slant-shaped Comfort Access fobs that were used in a variety of F series models from 2011 to 2017, require a battery CR2032. Both kinds can be bought at most department stores and auto shops at a reasonable price. A locksmith or BMW dealership can also provide you with the replacement BMW key. These keys are laser-cut, and encoded by the manufacturer of the vehicle to ensure compatibility with the keyless entry and start system. The disadvantage is that the keys are more expensive than the replacement keys and can take longer to arrive. If you're considering purchasing an alternative key for your BMW, consider using BimmerTech's convenient online ordering process to save yourself time and money. Some drivers prefer to use a smartphone as an “surrogate key” to start their BMW. Your smartphone can connect to the keyless start and entry system using Bluetooth technology. This is especially helpful during hot summer days and when you don't want to carry a heavy BMW Key in your pocket. Valet Key Batteries A key fob can be an excellent tool, but you might run out of batteries. This could make it difficult to secure your car and it can also prevent you from turning on the engine and drive. Fortunately, changing a BMW key fob battery isn't too difficult and can be done at home. The steps can differ based on the kind of key, but they're all quite similar. It is simple to replace the more modern key batteries that have a slant shape with an easy process. You simply need to press the small tab that opens the inside of the valet key which is found on either the side or bottom of the fob. Then, you can employ a flat screwdriver to remove the access port that conceals the battery. After removing the old battery, you can replace it with a brand new one. Then put everything back together. If you have an older diamond-shaped key that has rechargeable batteries, it can be more tricky to replace the battery. Contrary to the slant-shaped key, they aren't designed to have the battery replaced. They could be damaged if you try to pry off the back plate of the key. You can try to force it open, but you will likely require the assistance of a professional for doing so. It is recommended that if you have to replace the battery, you contact a dealership for professional help. Another thing to consider is that there are many different kinds of BMW keys that are available. Each of these key fobs has its own driver profile, and you can pair them with different drivers in the vehicle. This allows family members to use the same vehicle while still being able customize their driving experience. This article is most important since you need to know which kind of key you have and how to replace that key. It is essential to know this if want your car to start once you push the buttons on your key fob. This will help you avoid frustration when the key isn't functioning correctly, and can also save you a lot of money if you're not forced to make a repair appointment at an auto dealership.