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How to Replace a BMW Key The cost of replacing the BMW key can be expensive. This is because BMW keys are highly-technical and require reprogramming to function with your vehicle. The purchase of a new BMW key online will save you money, but it is essential to choose a seller that specializes in car keys and has positive reviews. It is also recommended to visit the dealership to make sure that your new key is properly programmed. Smart Keys Keys Today, many new BMW models come with a smart key system that allows you to lock and unlock your car with a simple click of one button on the steering wheel. Some models also feature remotes that allow you to start the engine and close the sunroof and windows from the distance. These keys are advanced and use radios for locking and unlocking and infrared (IR) to communicate with the dashboard. The IR circuit is the source of a bidirectional infrared bridge that sends commands to and from the dashboard, and also to the receptacle inside the key. This lets the key control the car from just a couple of meters away. The key is equipped with an RF coil which picks up and transmits the remote signal for locking from the car to the dashboard. These smart keys can also be used 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 to an iPhone and follow the prompts on your device. This will allow you the key to be shared with them that works when their phone is on and within Bluetooth range. In contrast to older key fobs, which transmit the same frequency over and over (which could be affecting other models and makes that use the same system, not to mention makes it easier for thieves with a tech background to steal vehicles) Modern smart keys broadcast a different encrypted signal each time they're used to open or close a door or pop the trunk. The vehicle's embedded radio antennas respond by creating the corresponding frequency to identify the key, unlock it or start it. Hacking is possible but it isn't impossible. An experienced professional can be able to intercept the IR transmissions and gain access to your vehicle. To ensure your safety, keep a backup key on hand or make sure to leave the smart key at home when going out to eat or shopping. If you do lose your keys, be sure you keep the VIN number of your BMW and your government ID in case you need to get a replacement from the dealer. Key Fob Batteries The key fob is a crucial element of the BMW driving experience, providing convenience and security at the press of a button. The battery for the key fob can also die, as with any device powered by a battery. This happens at the worst time. It's simple to replace the BMW key fob batteries. bmw key fob replacement cost along the seam that joins the two halves. The backplate of the fob is held in place by a an opening that can be opened using the flat-bladed screwdriver or finger. Install a new button cell battery in its place after taking off the backplate. The new battery will typically appear like a small coin, and will have plus and minus signs printed on it. Place the new battery in the same direction as the previous one, then snap the fob's two halves back together. After replacing the battery Test it by pressing the fob's buttons to ensure they function as you expect. Based on the model, you may have to re-sync your key fob to your vehicle or take other steps to ensure that it functions properly. If you need to sync your key fob again check the owner manual for specific instructions specific to your BMW. A dead or weak battery in your key fob can reduce the range that the signal can communicate with the car, which can limit the ability to lock or open the doors or trunk, or arm/disarm your alarm system. It is time to replace your battery if find yourself needing to get closer to your car to unlock the doors or start the engine. Changing the key fob's battery is a straightforward task that can be accomplished at home. After replacing the battery it is important to test the key fob's functions by locking and unlocking the vehicle or placing it in the ignition. Reassemble the keyfob, and test it again to confirm that it's working as intended. If you know the time when a key fob's battery needs to be replaced and how to replace the battery, and knowing how to start your vehicle with a dead key fob battery, you will be well on your way to enjoying the BMW's convenience and secure features. Slant Shaped Key Batteries BMW owners will likely benefit from the keyless entry system and ignition. These conveniences make driving your BMW much more comfortable and could help you avoid some common car issues. If you aren't paying attention to the signs that your BMW keyfob battery is running low, it could quickly go out. If your BMW key fob is damaged and is no longer in a position to communicate with the computer in your vehicle to unlock or start the engine. The battery in most BMW keys can be replaced easily. The process is simple and takes just about a minute. Keep an extra BMW in your pocket to recharge the battery if it gets depleted. The most important thing to remember when changing the BMW key fob battery is to use the correct replacement battery. The smart key requires a CR2450 as do the sleek slant-shaped, slant-shaped Comfort Access fobs, which were available in various F series models from 2011 until 2017 require a battery CR2032. Both types are available at most auto shops as well in department stores for a reasonable price. Another option is to purchase a replacement key for your BMW from a locksmith or dealership. These keys are laser-cut, and encoded by the manufacturer of the vehicle to ensure compatibility with the keyless entry and start system. These keys are more expensive and take longer to arrive than aftermarket versions. BimmerTech provides a user-friendly online ordering system for BMW replacement keys. This will help you save time and money. While the most common way to start your BMW is to use keys that are traditional, some 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 particularly useful on hot summer days and when you don't want to carry around a bulky BMW Key in your pocket. Valet Key Batteries A key fob can be an excellent tool, but it is possible to run out of batteries. This can make it difficult to lock your vehicle and stop you from being in a position to start the engine. It is simple 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 pretty similar. The latest slant-shaped key batteries are simple to replace using a a simple process. Press the small tab to unlock the valet key. It can be found on the bottom or the side of the fob. The battery is accessible by using a flat screwdriver. After you have removed 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 uses a rechargeable battery it could be more tricky to replace the battery. In contrast to the slant-shaped keys they are not designed to be replaced. They could be damaged by trying to remove the back plate of the key. You can try to open it however, you'll require the assistance of a professional for doing so. If you need to replace a battery that is old, it is recommended to call a dealer to get it done professionally. Another thing to consider is the fact that there are a variety of different types of BMW keys that are available. Each key fob has a specific driver profile, and you are able to pair them to different drivers in your vehicle. This makes it easier for family members to share a car, while still being capable of adjusting their driving experience. This is the most important part since you need to know which kind of key you have and how to replace it. This is vital if want to ensure that your car will start when you press the buttons on your fob. You will save yourself frustration and money by not needing to pay for an appointment at the dealership when your key doesn't work properly.