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How to Replace a BMW Key The cost of replacing a BMW key can be expensive. BMW keys are highly-technical, and require reprogramming in order to work with the vehicle. The purchase of a new BMW key online can save you money, but it is essential to choose a vendor that specializes in car keys and has positive reviews. It's also recommended that you visit a dealer to ensure that the replacement key is programmed correctly. Smart Keys Many new BMW models come with an intelligent-key system that lets you lock and unlock your car with just a click on the steering wheel. Additionally, certain models also come with a system that lets you start the engine from a distance and also remotely shut the windows and the sunroof. These advanced keys use radio to lock or unlock, and infrared to connect with dashboard. The IR circuit is the source of a bidirectional infrared bridge which transmits commands to and from the dashboard, and also to the receptacle in the key. This allows the key to control the car from just a few meters away. The key has an RF coil that receives and transmits the remote signal to lock the car to the dashboard. These smart keys also have the ability to store information like mirror and power seat settings. If you'd like to share access with a friend all you need to do is pair the key to an iPhone and follow the prompts on your device. This will enable you to share the key digitally and it will work as long as the phone is running and in Bluetooth range. In contrast to older key fobs that transmit the same frequency over and over (which could be affecting other models and makes using the same system, and could making it easier for thieves with a tech background to take vehicles), modern smart keys broadcast a different encrypted signal every time they're used to open or close a door or pop the trunk. The antennas in the vehicle respond by generating a corresponding frequency to recognize the key, and then unlock or start it. Hacking is possible but not impossible. A skilled professional can snoop on IR transmissions to gain access to your car. Always carry a backup key, or leave your smart key at home if are planning to go out to eat or shop. If relevant resource site lose your keys, be sure you 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 BMW key fob is a convenient device that offers convenience and security with the click of a button. The key fob battery can also fail, just like any device powered by batteries. This happens at the most inconvenient time. Fortunately replacing the battery of a BMW key fob battery is easy and quick. To replace the key fob's battery open the fob in the seam that connects its two halves. The backplate of the fob is typically held in place by a notch which can be opened using either a finger or a flat-blade screwdriver. Install a new button cell battery in its place after taking off the backplate. The new battery will typically appear like a small coin, with plus and minus symbols printed on it. Insert the new battery into the fob in the same orientation that you did when inserting 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 make sure 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 make sure it works properly. If you need to update the sync of your key fob make sure you consult the owner's manual for the specific instructions applicable to your BMW. A weak or dead key fob battery can reduce the range of the signal that communicates with your vehicle, limiting its ability to lock and unlock doors and trunk, or arm/disarm the alarm system. It is time to replace your battery if you notice that you need to be closer to your vehicle to unlock the doors or start the engine. It's simple to replace the battery inside your key fob at home. After replacing the battery, you should test the function of the keyfob by locking and unlocking your vehicle, or placing it in the ignition. Then, you can reassemble the key fob and run a test to ensure it works properly. If you know the time when a key fob's battery requires replacement and knowing how to replace the battery, and knowing how to start your vehicle with an empty battery from the key fob, you will be well on your way to enjoying all of your BMW's convenient and secure features. Slant Shaped Key Batteries If you're a BMW owner, you probably enjoy the benefits of your car's keyless entry and ignition features. These features can make driving your BMW more comfortable and may even assist you to avoid some common car problems. However, if you aren't aware of the signs that your BMW key fob battery is dwindling, it can quickly run out of juice. If your BMW key fob is damaged and it isn't able to communicate with the vehicle computer to unlock the doors or even start the motor. The batteries that are found in many BMW keys can be replaced. The process is easy and takes just about a minute. Keep an extra BMW in your pocket to charge the battery if it gets depleted. The most important thing to remember when changing a BMW key fob battery is to use the right type of replacement battery. A smart key will require an CR2450 battery. Likewise, the Comfort Access and sleek slant-shaped keys that are utilized in a number of F-series models from 2011 to 2017 will require the CR2032 battery. Both types can be purchased in most auto shops and department stores at a reasonable price. Another option is to get an alternative 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. The downside is that the keys are more expensive than aftermarket versions and can take longer to arrive. If you're looking to purchase an alternative key for your BMW look into BimmerTech's convenient online ordering process to save yourself time and money. Some drivers prefer using smartphones as an “surrogate key” to start their BMW. With Bluetooth technology, your smartphone can connect to your BMW's keyless entry and start system. This is especially helpful during hot summer days and when you don't want to carry a heavy BMW Key in your pocket. Valet Key Batteries A key fob can be a useful tool, but you might run out of batteries. This can make it difficult to secure your car and also stop you from being able to turn on the engine and drive. Luckily, replacing the BMW key fob battery isn't too difficult and can be done at home. The steps will differ based on the type of key, but they're fairly similar. The newer slant-shaped batteries for key batteries are simple to replace using a an easy process. You just need to press the small tab that releases the inside of the valet key, located on the side or bottom of the fob. The battery can be accessed with a screwdriver that is flat. 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 own an older diamond-shaped key with a rechargeable battery it could be more difficult to replace the battery. Contrary to the slant-shaped key, they are not intended to have the battery replaced. They can be damaged by trying to pry off the back plate of the key. You can force it open, but you'll probably need the help of an expert. It is recommended that if you need to replace the battery, you contact an authorized dealer for assistance. BMW keys are available in different styles. Each key fob comes with its own driver profile and can be connected to various drivers. This makes it easier for family members to share a vehicle while being capable of adjusting their driving experience. The most important aspect of this article is that you need to know which type 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 when the key isn't working properly, and it can also save you a lot of money if you're not obligated to make a repair appointment at the dealership.