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How to Replace a BMW Key The replacement of a BMW key is expensive. This is due to the fact that BMW keys are highly-technical and require reprogramming to work with your vehicle. You can save money by purchasing a brand new BMW car key online, but you must find a seller who is an expert in car keys and has good reviews. It is also recommended to visit the dealership to make sure that your new key is programmed correctly. Smart Keys Today, many of the latest BMW models come with a smart key system that lets you lock and unlock your car with a simple click of one button on the steering wheel. In addition, 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 keys are advanced and use radio to lock or unlock and infrared to communicate with the dashboard. The IR circuit powers a two-way infrared link that sends and receives commands from the dashboard, and also to the receptacle inside the key. This lets the key control the car from a few meters away. The key has an RF coil that receives and transmits the remote lock signal from the car to the dashboard. These smart keys also have the ability to store information such as mirror and power seat settings. If you want to share access to a person with whom you share access all you need to do is pair the key with an iPhone and follow the instructions on your device. This will allow you to give them the key digitally and it works when the phone is running and is within Bluetooth range. Modern smart keys, unlike older car keys that transmit the same frequency repeatedly (which could impact cars that use the same system, making it easier for criminals with tech skills to take cars), broadcast a different encrypted message each time they are used to open or shut doors or open the trunk. The vehicle's embedded radio antennas respond by creating the corresponding frequency to identify the key, unlock or open it. Hacking is possible but it isn't impossible. A skilled professional can intercept IR transmissions to gain access to your car. To safeguard yourself, keep a backup key on hand or ensure you leave the smart keys at home whenever you go out for a meal or out shopping. If you lose your keys, be sure to have your VIN number and ID from the government in case you require a replacement. Key Fob Batteries The key fob is a crucial feature of the BMW driving experience, providing convenience and security with the push of a button. The battery of the key fob could also go out of service, as with anything that is powered by a battery. This occurs at the worst time. Fortunately, replacing the battery of a BMW key fob battery is simple and quick. Open the fob along the seam which connects the two halves. The backplate of the fob is typically held in place by a notch which can be opened with either a finger or a flat-blade screwdriver. Install a new button cell battery after taking off the backplate. The new battery is usually designed to look as a small coin and has plus and minus symbols on it. The new battery should be placed in the same direction as the previous one, then snap the fob's two halves together. After replacing the battery After replacing the battery, test it by pressing the buttons on the fob to ensure they work as expected. Based on the model of your car, you may need to re-sync the key fob to your vehicle, or follow other steps to ensure proper operation. If you have to re-sync your key fob check the owner manual for detailed instructions specific to your BMW. A dead or weak battery in your key fob can reduce the range that the signal communicates with the car, which can limit the ability to lock or unlock the trunk or doors or arm/disarm your alarm system. If you are noticing that you need to step closer and closer to your vehicle in order to get the key fob to unlock or start your engine, it is likely time to replace the battery. It's simple to replace the battery inside your key fob at home. Once the battery is replaced it is crucial to test the key fob's functions by locking and unlocking the vehicle or putting it in the ignition. After that, reassemble the key fob and run a test to ensure that it works correctly. Understanding the time when the batteries of the key fob require replacement, the best way to replace them, and how to start a vehicle without a battery that is dead will allow you to take advantage of all of BMW's convenient features. Slant Shaped Key Batteries BMW owners probably make good use of the keyless entry system as well as ignition. These features can make driving your BMW more enjoyable and can help you avoid common car problems. If you aren't paying attention to the signs that your BMW keyfob battery is running low, it could quickly run out. If your BMW key fob dies and it isn't able to communicate with the vehicle computer to unlock the doors or start the motor. The batteries that are found in many BMW keys can be easily replaced. The process is easy and takes just minutes. If you have an extra BMW key it's recommended to keep it in your pocket so that you can swap the battery as soon as it's exhausted. The most important thing to remember when changing the BMW key fob battery is to select the right replacement battery. A smart key will require a CR2450 battery, while the Comfort Access and sleek slant-shaped fobs that are used in a variety of F-series models between 2011 and 2017 will require the CR2032 type of battery. Both types are available at the majority of auto shops as as department stores at a reasonable price. A locksmith or BMW dealership can also provide you with a replacement BMW key. The keys are laser cut and coded by vehicle 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 looking to purchase a replacement key for your BMW, consider using BimmerTech's easy online ordering process to save yourself time and money. The most popular method to start your BMW is to use a traditional key however, some drivers prefer using their smartphones as an “surrogate” key. Your smartphone can connect with the keyless entry and start system by using Bluetooth technology. This is particularly useful on hot weather and when you don't want to carry around a heavy BMW Key in your pocket. Valet Key Batteries Key fobs can be a useful tool, but it is possible to 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. Fortunately, replacing the BMW key fob battery isn't too difficult and can be done at home. The steps vary slightly based on the type of key you have however they're fairly similar. The newer slant-shaped key batteries are easy to replace through a an easy process. Simply press the small tab to release the inside of the valet key, which is found on either the side or bottom of the fob. The battery can be removed with a screwdriver that is flat. After removing the old battery you can replace it with a new one. After that, you can put it back together. If you have an older diamond-shaped key that has rechargeable batteries it could be more difficult to replace the battery. Contrary to the slant-shaped key, these are not designed to have the battery replaced. bmw car key replacement can be damaged by trying to remove the back plate of the key. You can attempt to force it open, but you will likely require the help of a professional to do so. It is recommended that if you have to replace a battery, you contact an auto dealer for help from a professional. Another thing to think about is that there are different kinds of BMW keys available. Each of these key fobs comes with a driver profile, and you are able to pair them with various drivers in the vehicle. This lets family members use the same vehicle while still being able customize their driving experience. This is the most important part because you need to know what kind of key you have and how to replace that key. This is crucial if you want to ensure that your vehicle will be able to start when you push the buttons on your fob. This can help you avoid frustration if your key isn't functioning correctly, and can also save you a significant amount of money since you're not obligated to make a repair appointment at the dealership.