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How to Replace a BMW Key The cost of replacing a BMW key can be expensive. This is because BMW keys are high-tech and require reprogramming to function with your vehicle. You can save money by purchasing a brand new BMW car key online, but you must locate a dealer who is specialized in car keys and has good reviews. It's also recommended that you visit a dealer to ensure that your new key is programmed correctly. Smart Keys Keys Many of the latest BMW models come with the smart-key system that allows you to lock and unlock your vehicle with just a click on the steering wheel. Some models even feature a system that lets you start the engine from a distance and also remotely shut the windows and the sunroof. These advanced keys use radio to lock or unlock, and infrared to connect with dashboard. The IR circuit is the source of an infrared bridge bidirectional that transmits commands to and from the dashboard and to the receptacle within the key. The key can be controlled by the car from a distance of just a few meters. The key also features an RF coil that picks up the remote lock signal of the car and transmits it to the dashboard. These smart keys also have the ability to save information such as power seat and mirror settings. If you'd like to share access with a friend all you need to do is connect the key with an iPhone and follow the prompts on your device. This will the key to be shared with them that is working as long as their phone is on and within Bluetooth range. Modern smart keys, in contrast to older car keys that broadcast the same frequency over and over again (which could harm cars using the same system and make it easier for criminals with tech skills to take cars) they transmit a different encrypted message each time they're used to open or shut the door or to open the trunk. The radio antennas in the vehicle respond by creating the corresponding frequency to identify the key, unlock or open it. Hacking is possible however, it is it isn't impossible. An experienced professional can be able to take over IR transmissions and gain access to your vehicle. Always have a backup key or leave your smart key at home if are planning to eat out or shop. If you do lose your keys, make sure to keep the VIN number of your BMW and government ID available in case you have to get an exchange from the dealer. Key Fob Batteries The BMW key fob is a convenient device that offers security and convenience with the click of a button. But, as with everything that is dependent on a battery, the key fob's battery will eventually die, often at the worst possible moment. Fortunately, replacing a BMW key fob's battery is easy and quick. To replace the key fob's battery open the fob in the seam connecting its two halves. The fob's backplate is held in place by a the notch that can be opened using a flat-bladed screwdriver or a finger. After the backplate is removed, place a brand new button cell battery into its place. The new battery will typically resemble a small coin and will have plus and minus symbols printed on it. The new battery should be placed in the same orientation as the previous one, then snap the fob's two halves together. After replacing the battery Test it by pressing each of the buttons on the fob to ensure they function as expected. Depending on the model, you might need to reconnect your key fob to your vehicle or take additional steps to make sure it works correctly. Refer to the owner's guide of your BMW for detailed instructions on how to sync the key fob. A weak or dead battery in your key fob can limit the range at which it communicates with your car, limiting the ability to lock or open the trunk or doors, or arm/disarm your alarm system. If you notice that you have to stand closer and closer to your vehicle in order to access the key fob to unlock or start your engine, it is likely time to replace the battery. Change the battery of the key fob is a straightforward task that can be completed at home. After replacing the battery, check the functionality of the keyfob by locking and unlocking your vehicle, or placing it in the ignition. Then, reassemble the key fob and run a test to ensure it works properly. If you know the moment when a key fob's batteries must be replaced, knowing how to change the battery, and knowing how to start your vehicle using a the battery of your key fob that is dead you'll be on your way to enjoying the BMW's convenience and secure features. Slant Shaped Key Batteries If you're a BMW owner, then you take a lot of advantage of your car's keyless ignition and entry features. These features make driving your BMW more enjoyable and can aid you in avoiding common car issues. However, if you aren't attentive to the indicators that your BMW key fob battery is dwindling it could quickly run out of juice. When your BMW key fob is dead and is no longer in a position to communicate with the vehicle's computer to unlock or start the engine. The batteries in the majority of BMW keys can be easily replaced. The process is easy and takes only a few moments. If you have an extra BMW key it's a good idea to keep it in your pocket so you can change the battery if it is depleted of power. When replacing a BMW keyfob battery, it is crucial to use the correct kind of battery. The smart key requires a CR2450, while 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 CR2032 battery. Both are available at the majority of auto shops as in department stores for an affordable price. A locksmith or BMW dealership can also provide you with a replacement BMW key. These keys are laser cut and digitized by vehicle manufacturers to ensure compatibility with keyless entry and start systems. They are more expensive and take longer to arrive than aftermarket versions. BimmerTech provides a simple online ordering system for BMW keys replacement. This will help you save time and money. While the most commonly used method to start your BMW is with the traditional key certain drivers prefer using their smartphones as a “surrogate” key. Your smartphone can connect to your BMW's keyless start and entry system by using Bluetooth technology. This is especially helpful during hot summer days, when you don't wish to carry a heavy BMW Key in your pocket. Valet Key Batteries Key fobs are a very useful tool, but sometimes you may run out of battery power. This can make it difficult to lock your car, and it can also prevent you from turning on the engine and drive. It is easy to change the battery in a BMW keyfob. The steps can vary a little depending on what kind of key you have, but they are all very similar. It is simple to replace the key batteries that have a slant shape with an easy procedure. Simply press the small tab to release the inside of the valet key, located on the bottom or side of the fob. Then, you can use a flat screwdriver to take out the access port that is hiding the battery. After more info 've removed the old battery and replacing it with a brand new one. Then put everything back together. If you own an older diamond-shaped key that has a rechargeable battery, it can be more tricky to replace the battery. In contrast to the slant-shaped keys these are not intended to have the battery replaced. They could be damaged if you try to pry off the back plate of the key. You may 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 that you contact an authorized dealer to have it done by a professional. Another thing to consider is that there are different types of BMW keys available. Each key fob comes with its individual driver profile and can be paired with different drivers. This allows family members to share a single car, while still being capable of adjusting their driving experience. The most important thing to remember in this article is that you need to know which type of key you have and how to replace it. This is essential if you want to ensure that your vehicle will be able to start when you press the buttons on your fob. This will save you from frustration if the key isn't working correctly, and it could also save you lots of money if you are not forced to pay for a service appointment at an auto dealership.