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How to Replace a BMW Key The cost of replacing a BMW key could be expensive. BMW keys are highly-technical, and need to be reprogrammed to function with the vehicle. Purchasing a new BMW key online can save you money, but it is important to find a vendor that specializes in keys for cars and has excellent reviews. It's also recommended that you visit a dealership to ensure that your new key is programmed correctly. Smart Keys Keys Today, many of the latest BMW vehicles come standard with an intelligent key system that lets you lock and unlock your vehicle with a simple click of an icon on the steering wheel. Some models also feature a remote system that allows you to start the engine and close the sunroof and windows from a distance. These advanced keys use radio to lock and unlock, and infrared to connect with the dashboard. The IR circuit is powered by an infrared link with two ways that transmits commands from the dashboard, and also to the receptacle in the key. This lets the key control the car from just a few meters away. The key also features an RF coil that detects the car's remote lock signal and transmits it to the dashboard. These smart keys are also able to store information like mirror and power seat settings. If you want to share access to a friend all you need to do is connect the key to an iPhone and follow the prompts on your device. This will enable you to provide them with an electronic key that can be used when the phone is turned on and in Bluetooth range. In contrast to older key fobs that transmit the same frequency over and over (which could impact other makes and models utilizing the same system, not to mention makes it easier for thieves with a tech background to steal vehicles), modern smart keys emit a distinct encrypted signal every time they're used to open or close a door or pop the trunk. The radio antennas in the vehicle respond by generating the corresponding frequency to identify the key, lock it or start it. Hacking is possible however, it is it isn't impossible. A skilled professional can take over IR transmissions and gain access to your vehicle. Always have a backup key or leave your smart key at home if are planning to eat out or shop. If you lose your keys, be sure to keep your VIN number and government ID handy in case you need an replacement. Key Fob Batteries The key fob is a crucial feature of the BMW driving experience, offering security and convenience by pressing a button. The battery for the key fob can also go out of service, as with anything that is powered by a battery. This happens at the most inconvenient time. Fortunately, replacing the battery of a BMW key fob's battery is simple and quick. Open the fob at the seam which connects the two halves. The backplate of the fob is held in place with a notch which can be opened using an screwdriver with a flat blade or a finger. Once the backplate is removed, you can insert a new button cell battery into the slot. The new battery will usually look like a small coin and have plus and minus symbols printed on it. Place the new battery inside the fob in the same orientation that you used to insert the old battery and then snap the two halves together. After replacing the battery on the key fob, press each button to verify whether it functions as you expect. Depending on the model, you might have to re-sync your key fob to your vehicle or take other steps to ensure it is working correctly. If you need to sync your key fob again check the owner manual for specific instructions specific to your BMW. A weak or dead battery in your key fob can reduce the range that it communicates with your vehicle, limiting its ability to lock or unlock the doors or trunk, or arm or disarm your alarm system. If you are noticing that you have to stand closer and closer to your car to unlock the key fob, or unlock or start your engine, it is likely time to replace the battery. bmw extra key is easy to change the battery in 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, reassemble the key fob and test again to ensure that it works correctly. Understanding the time when the batteries of the key fob need to be replaced and the best way to replace them, and how to start a car without a battery that is dead will allow you to take advantage of all of BMW's features. Slant Shaped Key Batteries If you're a BMW owner, you probably take a lot of advantage of the keyless ignition and keyless entry features. These conveniences can make driving your BMW more comfortable and may even assist you to avoid some common car problems. If you aren't paying attentively to the indications that your BMW keyfob battery is low, it could quickly run out. If your BMW key fob fails to function and it isn't able to communicate with the computer in the vehicle to unlock the doors or start the motor. Fortunately, the battery in most BMW key fobs can be replaced relatively cost-effectively. The process is simple and takes just a few moments. Keep an extra BMW in your pocket to replace the battery when it is exhausted. When replacing a BMW keyfob battery, it is crucial to use the correct type of battery. The smart key requires a CR2450 while the sleek slant-shaped slant-shaped Comfort Access fobs that were used in a variety of F series models from 2011 until 2017 require a battery CR2032. Both are available at many auto shops as well in department stores for an affordable price. Another option is to purchase a replacement key for your BMW from an authorized locksmith or dealer. The 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 they are more expensive than the ones from the aftermarket and may take longer to arrive. BimmerTech provides a user-friendly online ordering system for BMW keys replacement. This will save you time and money. The most popular method to start your BMW is to use keys that are traditional certain drivers prefer to use their smartphones as a “surrogate” key. Your smartphone can connect with the keyless start and entry system via Bluetooth technology. This is especially useful during hot weather, when you don't wish to carry around a bulky BMW Key in your pocket. Valet Key Batteries Key fobs are extremely useful tool but at times, you may be unable to recharge your battery. This can make it difficult to lock your vehicle and also prevent you from being in a position to start the engine. It is easy to change the battery in a BMW keyfob. The steps vary slightly based on the kind of key you own, but they are all fairly similar. It is easy to replace the more modern slant shaped key batteries with an easy procedure. Simply press the small tab that opens the inside of the valet key located on the bottom or side of the fob. The battery is accessible with a screwdriver that is flat. After the old battery has been removed, you can install the new one and put it back together. It isn't easy to replace a battery on the older diamond-shaped keys with rechargeable one. In contrast to the slant-shaped keys they aren't designed to have the battery replaced and can be damaged if you try to remove the back plate of the key. You can try to force it open but you'll need a professional to do the job. It is recommended that if you need to replace the battery, you contact a dealership for professional help. BMW keys come in many different styles. Each of these key fobs has its own driver profile, and you are able to pair them with different drivers in your vehicle. This lets family members use the same vehicle but still have the ability to personalize their driving experience. The most important part of this article is to know which type of key you have and the best way to replace it. It is essential to know this if would like your car to start once you push the buttons on the key fob. This will save you from frustration if your key is not working properly, and it can also save you a significant amount of money if you're not forced to make a repair appointment at a dealership.