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How to Replace a BMW Key Replacement of a BMW key is costly. key bmw are high-tech, and must be reprogrammed to function with the vehicle. The purchase of a new BMW key online could save you money, but it is essential to choose an online retailer that is specialized in car keys and has positive reviews. It is also recommended to visit the dealership to make sure the replacement key is programmed correctly. Smart Keys Many of the latest BMW models come with the smart-key system that allows you to lock and unlock your car with just a click on the steering wheel. Some models also feature remotes that allow you to start the engine and shut the windows and sunroof from an extended distance. These keys feature radio for locking or unlocking and infrared (IR) to communicate with the dashboard. The IR circuit is a two-way infrared link which transmits commands from and to the dashboard, and also to the receptacle within the key. The key is able to control the car even at a distance of few meters. The key has an RF coil that detects and transmits the remote signal to lock the car to the dashboard. These smart keys also have the ability to store information like power seat and mirror settings. If you'd like to share access to a friend all you need to do is connect the key to an iPhone and follow the prompts on your device. This will allow you provide them with a key that works as long as their phone is in Bluetooth range. Unlike older car key fobs that transmit the same frequency over and over (which could impact other models and makes using the same system, and could makes it easier for tech-savvy thieves to steal cars), modern smart keys emit a distinct encrypted signal every time they're used to open or close a door, or open the trunk. The vehicle's embedded radio antennas respond by generating the corresponding frequency to identify the key, unlock it or turn it on. Smart key systems may be vulnerable to hacking, however. A skilled professional can snoop on IR transmissions and gain access to your vehicle. To ensure your safety, keep a backup key or ensure that you keep the smart key at home when you go out for a meal or out shopping. If you lose your keys, be sure to keep 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 provides convenience and security with the click of a button. The battery of the key fob could also go out of service, as with everything powered by a battery. This occurs at the worst time. It's easy to replace the BMW key fob's batteries. Open the fob at the seam which connects the two halves. The fob's backplate is usually held in place by a notch which can be opened with the fingers or a screwdriver with a flat blade. Install a new button cell battery in its place after taking off the backplate. The new battery will usually look like a small coin with plus and minus signs printed on it. The new battery should be placed in the same direction as the previous one, then snap the fob's two halves back together. After replacing the battery on the key fob, press each button to test whether it functions as you expect. Depending on your model you may have to re-synchronize the key fob to your vehicle or follow other steps to ensure proper function. If you need to sync your key fob again, consult the vehicle's owner manual for specific instructions specific to your BMW. A dead or weak battery in your key fob can reduce the range it communicates with your vehicle, limiting its capability to lock or unlock the trunk or doors or arm/disarm your alarm system. It is time to replace your battery if you find yourself needing to move closer to your car to unlock the doors or start the engine. It's easy to replace the battery in your key fob at home. After replacing the battery, you should test the function of the keyfob by locking and unlocking your vehicle or placing it in the ignition. Reassemble the keyfob and then test it again to make sure that it is working properly. By knowing the time when a key fob's battery requires replacement, knowing how to change the battery, and knowing how to start your vehicle using a an empty battery from the key fob you'll be on your way to taking advantage of all of your BMW's convenient and secure features. Slant Shaped Key Batteries If you're a BMW owner, you likely enjoy the benefits of the keyless ignition and entry features. These features make driving your BMW much more comfortable and can assist you in avoiding some common car issues. If you aren't paying attention to the indicators that your BMW keyfob battery is low, it may run out. If your BMW key fob is damaged, it can't communicate with the car computer to unlock the doors or start the motor. The batteries in the majority of BMW keys can be replaced easily. The process is easy and takes only minutes. Keep an extra BMW in your pocket to charge the battery if it is exhausted. The most important thing to keep in mind when replacing a BMW key fob battery is to use the right type of replacement battery. The smart key requires a CR2450, while the sleek slant-shaped and Comfort Access fobs that were used in a variety of F series models from 2011 to 2017 require a CR2032 battery. Both are available in the majority of auto shops as in department stores for a reasonable price. Another option is to get an alternative key for your BMW from an authorized locksmith or dealer. The keys are laser cut and coded by car manufacturers to ensure compatibility with keyless entry and starting systems. These keys are more expensive and take longer to arrive than aftermarket versions. BimmerTech provides a simple online ordering system for BMW replacement keys. This will help you save time and money. The most popular method to start your BMW is using keys that are traditional, some drivers prefer using their smartphones as a “surrogate” key. Smartphones can be connected to the keyless entry and start system using Bluetooth technology. This is especially helpful during hot days, when you don't wish to carry around a bulky BMW Key in your pocket. Valet Key Batteries Key fobs can be an effective tool, however you may sometimes run out of batteries. This can 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 in the case of a BMW keyfob. The steps will differ based on the type of key, however they're all fairly similar. The newer slant-shaped batteries for key batteries are easy to replace through a a simple process. Simply 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 which conceals the battery. After removing the old battery and replacing it with a new one. Then, put everything back together. If you own an older diamond-shaped key with a rechargeable battery It can be difficult to replace the battery. These keys aren't intended to be replaced with batteries, and they can be damaged if you attempt to pry the backplate off. You can force it open, but you'll likely need to hire a professional. If you need to replace a battery that is old it is recommended to call an authorized dealer to have it done properly. Another thing to take into consideration is that there are many different kinds of BMW keys that are available. Each key fob has its individual driver profile and can be paired to different drivers. This makes it easier for family members to share a single car, while still being able to customize their driving experience. The most important aspect of this article is that you need to know which type of key you have and the best way to replace it. This is essential if you want to ensure that your car can start when you press the buttons on your fob. You can avoid frustration and save money by not needing to pay for an appointment at the dealership in the event that your key doesn't perform as expected.