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How to Replace replacement key for bmw of replacing a BMW key can be expensive. BMW keys are high-tech, and need to be reprogrammed in order to work with the vehicle. You can save money by purchasing a brand new BMW car key online, but you must find a vendor who is an expert in car keys that has excellent reviews. It is also recommended that you visit a dealership to ensure that the replacement key is programmed correctly. Smart Keys Keys A lot of new BMW models are equipped with the smart-key system that lets you unlock and lock your vehicle with just a click on the steering wheel. In addition, some models come with a feature that allows you to start the engine from a distance and also remotely shut the windows and open the sunroof. These keys feature radios for locking and unlocking and infrared (IR) to communicate with the dashboard. The IR circuit creates an infrared bridge bidirectional that sends commands to and from the dashboard and to the receptacle inside the key. The key is able to control the car even from a distance of just a few meters. The key also comes with an RF coil that picks up 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 want to share access with a friend all you have to do is pair the key to an iPhone and follow the instructions on your device. This will enable you to provide them with a key that works as long as their phone is on and within Bluetooth range. Contrary to older key fobs for cars that transmit the same frequency over and over (which could affect other models and makes that use the same system, not to mention makes it easier for tech-savvy thieves to take vehicles) Modern smart keys emit a distinct encrypted signal each time they're used to open or close a door, or pop the trunk. The antennas in the vehicle respond by emitting a specific frequency to identify the key and allow it to unlock or turn it on. Smart key systems can still be vulnerable to hacking however. An experienced professional can be able to be able to intercept IR transmissions and gain access to your vehicle. To ensure your safety, keep a backup key on hand or ensure you leave the smart key at home when you go out for a meal or 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 BMW key fob offers security and convenience with the click of a button. But, just like anything that relies on batteries the battery of the key fob can die-often at the worst possible moment. Fortunately the replacement of the BMW key fob's battery is quick and easy. Open the fob along the seam which connects the two halves. The backplate of the fob is held in place with the notch that can be opened using a flat-bladed screwdriver or a finger. After the backplate has been removed, place a brand new button cell battery in its place. The new battery is typically formed like a small coin, with plus and minus symbols printed on it. Place the new battery inside the fob in the same way as you did with the old battery, and then join the two halves. 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-sync the key fob with your vehicle or follow other steps to ensure that it functions properly. If you have to update the sync of your key fob make sure you consult the owner's manual for detailed instructions specific to your BMW. A weak or dead key fob battery can reduce the range of the signal it transmits with your car, limiting its ability to lock and unlock the trunk and doors, or arm/disarm the alarm system. It is time to replace your battery if notice that you need to get closer to your car to unlock the doors or start the engine. Change inquiry of the key fob is a simple job that can be accomplished at home. After the battery has been replaced, it's important to test the key fob's functions by locking and unlocking the vehicle or putting it in the ignition. Then, you can reassemble the key fob, and then test it again to ensure it works properly. Understanding what happens when the batteries on the key fob need to be changed, how 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 will likely benefit from the keyless entry system and ignition. These features can make driving your BMW more enjoyable and can help you to avoid some common car problems. If you're not aware of the signs that your BMW key fob battery is dwindling it could quickly run out of juice. When your BMW key fob is damaged it's not in a position to communicate with the vehicle's computer in order to unlock or start the engine. The batteries that are found in many BMW keys can be replaced. The process is straightforward and typically takes only about a couple of minutes to complete. If you have an extra BMW key It's a good idea to keep it in your pocket so that you can replace the battery as soon as it's exhausted. When replacing a BMW keyfob battery, it's important to select the right type of battery. A smart key will require an CR2450 battery. Likewise, the Comfort Access and sleek slant-shaped fobs utilized in a number of F-series models between 2011 and 2017 will require the CR2032 battery. Both are available in most auto shops as well in department stores for an affordable price. A locksmith or BMW dealership can also supply you with an alternative BMW key. The keys are laser cut and coded by car manufacturers to ensure compatibility with keyless entry and starting systems. The drawback is that they are more expensive than aftermarket versions and can take longer to arrive. If you're interested in getting an alternative key for your BMW you should consider BimmerTech's online ordering system to save yourself time and money. While the most commonly used method to start your BMW is using a traditional key, some drivers prefer using their smartphones as a “surrogate” key. Your smartphone can connect with the keyless start and entry system by using Bluetooth technology. This can be particularly useful during hot weather when you don't want to carry an oversized BMW key around in your pocket. Valet Key Batteries Key fobs are useful device however, sometimes you might run out of battery power. This can make it hard to lock your car and it could also prevent you from turning on the engine and drive. Fortunately, changing the BMW key fob battery isn't difficult and can be done at home. The steps may differ a little depending on what kind of key you own, but they are all pretty similar. The newer slant-shaped key batteries are easy to replace through a an easy process. Press the small tab to unlock the valet key. This can be found on the bottom or the side of the fob. Then, you can use a flat screwdriver to remove the access port that is hiding the battery. After the old battery has been removed, you can put in a new one and then put it back together. If you own an older, diamond-shaped key that uses rechargeable batteries, it can be more difficult to replace the battery. These keys aren't designed to be replaced using batteries, and they can be damaged if you attempt to pry off the backplate. You can force it open, but you'll most likely need a professional. If you need to replace a battery that is old, it is recommended to contact a dealer to get it done professionally. Another thing to consider is that there are many different types of BMW keys available. Each key fob has its individual driver profile and can be linked to various drivers. This lets family members share the same car but still have the ability to personalize their driving experience. This is a crucial article since you need to know what kind of key you have and how to replace that key. It is important to know this if you would like your car to start when you press the buttons on the key fob. This will save you from frustration if the key isn't working properly, and it can also save you a lot of money since you're not forced to make a repair appointment at an auto dealership.