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How to Replace a BMW Key The cost of replacing a BMW key can be costly. This is due to the fact that BMW keys are high-tech and require reprogramming to function with your vehicle. You can save money by purchasing a brand new BMW car key online, but you must find a seller who specializes in car keys that has excellent reviews. It is also recommended to visit the dealership to ensure that your new key is programmed correctly. Smart Keys Many of the latest BMW models come with a smart-key system that lets you lock and unlock your car by simply turning the steering wheel. Some models also feature remote systems that allow you to start the engine and shut the sunroof and windows from a distance. These advanced keys use radio to lock / unlock, and infrared to connect with dashboard. The IR circuit is powered by an infrared link with two ways that transmits and receives commands from the dashboard, in addition to the receptacle inside the key. This lets the key control the car from a couple of meters away. The key also has an RF coil that detects the remote lock signal from the car and transmits it to the dashboard. These smart keys also have the ability to save information such as mirror and power seat settings. To share access with someone else, you simply need to pair the key with an iPhone and then follow the instructions on your device. This will allow you provide them with a key that works when their phone is in Bluetooth range. Modern smart keys, in contrast to 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 steal cars) they transmit a different encrypted message each time they're used to open or shut doors or open the trunk. The car's radio antennas respond by generating the corresponding frequency to identify the key, unlock or start it. Smart key systems can still be vulnerable to hacking however. A skilled professional can snoop on IR transmissions to gain access to your vehicle. Always have a backup key or leave your smart key at home if you plan to go out to eat or shop. If you do lose your keys, make sure to have the VIN number of your BMW and a government ID in case you have to obtain a replacement from a dealer. Key Fob Batteries The key fob is an essential element of the BMW driving experience, providing security and convenience with the push of a button. The key fob battery can also die, as with anything that is powered by batteries. This happens at the most inconvenient time. It's simple to replace the BMW key fob's batteries. Open the fob along the line which connects the two halves. The backplate of the fob is held in place by a the notch that can be opened with an screwdriver with a flat blade or a finger. Once the backplate is removed, insert a new button cell battery in its place. The new battery is likely to appear like a small coin, and have plus and minus symbols printed on it. Insert the new battery into the fob in the same orientation as you did with the old battery and then join the two halves. After replacing the battery Test it by pressing each of the buttons on the fob to ensure they work as expected. Based on the model, you might have to re-sync your key fob to your vehicle or take other steps to ensure it is working properly. Consult the owner's manual of your BMW for more detailed instructions on how to sync the key fob. A dead or weak battery in your key fob may reduce the range it communicates with your vehicle, limiting its capability to lock or unlock the doors or trunk, or arm or disarm your alarm system. If you're finding that you need to step closer and closer to your vehicle to unlock the key fob, or unlock or start the engine, it's time to replace the battery. It's easy to replace the battery inside your key fob at home. After replacing the battery, you should test the keyfob's functionality by locking and unlocking your vehicle, or placing it in the ignition. Reassemble the keyfob, and test it again to confirm that it is working properly. Understanding what happens when the batteries on the key fob need to be replaced and 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 features. Slant Shaped Key Batteries BMW owners will likely 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 to avoid some common issues with your car. However, if you aren't careful about the signs that your BMW key fob battery is depleting, it can quickly become depleted of power. If your BMW key fob fails to function and it isn't able to communicate with the vehicle computer to open the doors or start the motor. The batteries that are found in many BMW keys can be easily replaced. The procedure is easy and typically takes about a couple of minutes to complete. Keep an extra BMW in your pocket to charge the battery if it gets depleted. When replacing a BMW keyfob battery, it is important to use the correct type of 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 kinds can be bought in most auto shops and department stores at reasonable prices. Another option is to get a replacement key for your BMW from the dealership or a locksmith. key bmw are laser cut and digitized by car manufacturers to ensure compatibility with keyless entry and start systems. These keys are more expensive and take longer to arrive than aftermarket versions. If you're considering purchasing an additional key for your BMW, consider using BimmerTech's convenient online ordering process to save yourself time and money. Some drivers prefer using a smartphone as an “surrogate key” to start their BMW. Your smartphone can connect with your BMW's keyless start and entry system using Bluetooth technology. This is especially helpful during hot summer days, when you don't wish to carry a heavy BMW Key in your pocket. Valet Key Batteries A key fob is an effective tool, however you may sometimes run out of batteries. This can make it difficult to lock your car and also prevent you from being able to start the engine. Luckily, replacing the BMW key fob battery isn't too difficult and can be done at home. The steps can vary slightly depending on the kind of key you own, but they are all pretty similar. It is simple to replace the newer slant shaped key batteries with a simple procedure. Press the small tab to release the valet key. This can be found on the bottom or the side of the fob. Then, you can make use of a flat screwdriver take out the access port that is hiding the battery. After you've removed the old battery, you can replace it with a new one. Then, put everything back together. It can be a challenge to replace a battery in the older diamond-shaped keys with rechargeable one. These keys are not designed to be replaced with batteries, and they can be damaged if you attempt to remove the backplate. You can force it open, but you'll most likely need a professional. It is recommended that if you need to replace batteries, you call an authorized dealer for assistance. BMW keys come in many different varieties. Each key fob has its own driver profile and can be linked to different drivers. This allows family members to share the same vehicle, and still be able to customize their driving experience. This is a crucial article because you must know what kind of key you have and how to replace it. It is crucial to know this if want your car to start once you push the buttons on your key fob. This will help you avoid frustration if the key isn't functioning correctly, and can also save you lots of money if you are not required to pay for a service appointment at an auto dealership.