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How to Replace a BMW Key The cost of replacing the BMW key could be expensive. BMW keys are highly-technical, and need to be reprogrammed to function with the vehicle. You can save money by purchasing a brand new BMW car key online, but you should locate a dealer who specializes in car keys that has excellent reviews. It's also recommended that you visit a dealership to make sure that your new key is programmed correctly. Smart Keys Keys Many of the latest BMW models are equipped with an intelligent-key system that allows you to lock and unlock your vehicle with just a click on the steering wheel. Additionally, certain models also come with a system that allows you to start the engine from a distance and also remotely shut the windows and the sunroof. These keys feature radios for locking and unlocking and infrared (IR) to communicate with the dashboard. The IR circuit is a two-way infrared link that sends commands from the dashboard, as well as to the receptacle in the key. The key is able to control the car at a distance of few meters. The key also comes with 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 the power seat and mirror settings. If you wish to share access with a friend all you need to do is pair the key with an iPhone and follow the instructions on your device. This will give them a key that can be used when their phone is in Bluetooth range. Contrary to older key fobs for cars that transmit the same frequency repeatedly (which could impact other models and makes using the same system, not to mention makes it easier for thieves with a tech background to take cars) Modern smart keys transmit a distinct encrypted signal each time they're used to open or close a door or pop the trunk. The car's antennas respond by emitting a specific frequency to recognize the key and allow it to unlock or start it. Smart key systems may be vulnerable to hacking however. A skilled professional could be able to intercept IR transmissions and gain access to your vehicle. To ensure your safety, keep a backup key or make sure to keep the smart key at home whenever you go out for a meal or out shopping. If you lose your keys, make sure to keep the VIN number of your BMW and your government ID in case you need to get an exchange from the dealer. Key Fob Batteries The BMW key fob is a convenient device that offers convenience and security with the push of a single button. However, like everything that relies on a battery, the key fob's battery is prone to dying at the worst possible moment. Fortunately replacing a BMW key fob's battery is quick and easy. Open the fob along the seam that joins the two halves. The fob's backplate is usually fixed by a notch which can be opened with either a finger or a screwdriver with a flat blade. Insert a new button-cell battery into its place after removing the backplate. The new battery will usually appear like a small coin, and will have plus and minus signs printed on it. Insert the new battery into the fob with the same orientation as you did with the old battery, and then join the two halves. After replacing the battery on the key fob make sure to press each button to ensure whether it functions as you expect. Based on the model of your car, you may need to re-sync the key fob with your vehicle, or follow other steps to ensure proper function. Consult the owner's manual of your BMW for detailed instructions on how to sync the key fob. A weak or dead key fob battery could reduce the range of the signal that communicates with your car, which can limit its ability to lock and unlock the doors and trunk and arm/disarm the alarm system. It is time to replace the battery if you notice that you need to move closer to your car to unlock the doors or start the engine. It's simple to replace the battery in your key fob at home. Once the battery is replaced it is crucial to test the functions of the key fob by locking and unlocking the vehicle, or placing it in the ignition. Reassemble the keyfob and test it again to confirm that it is working properly. If you know the time when a key fob's battery needs to be replaced and knowing how to replace the battery, and knowing 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 convenience and secure features. genuine bmw replacement key are likely to make good use of the keyless entry system and ignition. These features make driving your BMW much more comfortable and can aid you in avoiding common car problems. If you're not attentive to the indicators that your BMW key fob battery is depleting, it can quickly be out of juice. When your BMW key fob is damaged and is no longer capable of communicating with the vehicle's computer in order to unlock or start the engine. Fortunately, the battery in most BMW key fobs can be replaced relatively cost-effectively. The process is simple and usually takes just a few minutes to complete. If you have a spare BMW key It's an ideal idea to keep it in your pocket so that you can replace the battery if it runs out of power. The most important thing to keep in mind when replacing the BMW key fob battery is to select the correct replacement battery. A smart key requires a CR2450 battery, while the Comfort Access and sleek slant-shaped fobs used in a variety of F-series models between 2011 and 2017 will require the CR2032 battery. Both types are available at many auto shops as well in department stores for an affordable price. A locksmith or BMW dealership can also provide you with the replacement BMW key. The keys are laser cut and digitized by car manufacturers to ensure compatibility with keyless entry and starting systems. They are more expensive and take longer to arrive than the aftermarket ones. If you're considering purchasing a replacement key for your BMW you should consider BimmerTech's convenient online ordering process to save time and money. Some drivers prefer to use smartphones as an “surrogate key” to start their BMW. Your smartphone can connect to your BMW's keyless start and entry system via Bluetooth technology. This is especially helpful on hot days when you don't want to carry an oversized BMW key in your pocket. Valet Key Batteries Key fobs are useful device however, sometimes you might run out of battery power. This could make it difficult to lock your car and also prevent you from being able to start the engine. It is simple to change the battery in the case of a BMW keyfob. The steps may differ slightly based on the kind of key you have however, they're all fairly similar. The latest slant-shaped key batteries are easy to replace with an easy process. Simply press the small tab to release the inside of the valet key located on the bottom or side of the fob. The battery is accessible with a screwdriver that is flat. After removing the old battery and replacing it with a brand new one. Then put everything back together. It can be difficult to replace a battery on an older diamond-shaped key with a rechargeable one. These keys are not designed to be replaced with a battery, and can be damaged if you try to pry the backplate off. You can force it open but you'll most likely need an expert. If you're looking to replace a battery that is old, it is recommended to call a dealer to get it done professionally. Another thing to take into consideration is that there are many different types of BMW keys available. Each key fob comes with its individual driver profile and can be connected with different drivers. This allows family members to share a car while being able to customize their driving experience. The most important aspect of this article is to know the type of key you own and how to replace it. It is important to know this if want your car to start when you press the buttons on your key fob. You can save yourself frustration and money by not needing to pay for an appointment at the dealership in the event that your key doesn't function properly.