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How to Replace a BMW Key The cost of replacing a BMW key could be expensive. BMW keys are high-tech and require reprogramming to function with the vehicle. A new BMW key online will 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 replacement is properly programmed. Smart Keys Keys Many new BMW models are equipped with an intelligent-key system that lets you lock and unlock your vehicle by simply turning the steering wheel. In addition, some models even feature a system that lets you start the engine from a distance, and also remotely close the windows and the sunroof. These keys feature radios for locking and unlocking as well as infrared (IR) to communicate with the dashboard. The IR circuit is an infrared link with two ways which transmits and receives commands from and to 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 is equipped with an RF coil that detects and transmits the remote lock signal from the car to the dashboard. These smart keys can also be used to store information like power seat and mirror settings. To share access with someone else, you simply need to pair the key to an iPhone and then follow the instructions on your device. This will permit you to give them a digital key that works as long as the phone is running and in Bluetooth range. Modern smart keys, unlike older car keys that broadcast the same frequency over and over again (which could affect cars using the same system and make it easier for criminals with tech skills to steal cars) They transmit a distinct encrypted message each time they are used to open or close the door or to open the trunk. The vehicle's embedded antennas then respond by creating a similar frequency in order to identify the key and unlock or open it. Hacking is possible but it isn't impossible. A skilled professional can snoop on IR transmissions and gain access to your car. To safeguard yourself, keep a backup key on hand or ensure that you keep the smart key at home when going out to eat or out shopping. If you lose your keys, make 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 element of the BMW driving experience, offering security and convenience at the press of a button. The key fob battery can also go out of service, as with anything that is powered by a battery. This occurs at the worst time. Fortunately the replacement of a BMW key fob's battery is easy and quick. To replace the battery in the key fob you must open the fob at the seam connecting its two halves. The backplate of the fob is secured by a the notch that can be opened using the flat-bladed screwdriver or finger. Install a new button cell battery in its place after removing the backplate. The new battery will typically resemble a small coin and will have plus and minus symbols printed on it. The new battery should be placed in the same direction as the previous one, then snap the fob's two halves back together. After replacing the battery on the key fob, press each button to ensure that it works as expected. Based on the model of your car you may have to re-synchronize the key fob to your vehicle, or follow other steps to ensure proper function. Check the owner's manual for your BMW for more detailed instructions on how to re-sync the key fob. A weak or dead battery for the key fob could reduce the range of the signal it transmits with your vehicle, limiting its ability to lock and unlock trunk and doors and arm/disarm the alarm system. If you're finding that you have to stand closer and closer to your vehicle to access the key fob to unlock or start the engine, it is likely time to replace the battery. It's simple to replace 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. Reassemble the keyfob, and test it again to make sure that it's functioning properly. If you know the moment when a key fob's batteries must be replaced and knowing how to replace the battery, and also how to start your car with a the battery of your key fob that is dead you'll be on your way to enjoying the BMW's convenient and secure features. Slant Shaped Key Batteries BMW owners are likely to benefit from the keyless entry system as well as ignition. These conveniences make driving your BMW much easier and can help you avoid some common automotive problems. However, if G28 of the signs that your BMW key fob battery is dwindling, it can quickly become depleted of power. If your BMW key fob is damaged it's not capable of communicating 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 easily. The procedure is simple and takes just a few moments. Keep an extra BMW in your pocket to replace the battery when it gets depleted. When replacing the BMW keyfob battery, it's important to choose the correct type of battery. A smart key will require a CR2450 battery, while the Comfort Access and sleek slant-shaped fobs used in a variety of F-series models between 2011 and 2017 will require the CR2032 battery. Both are available in most auto shops as well as department stores at affordable prices. A locksmith or BMW dealership can also supply you with a replacement BMW key. These keys are laser-cut and coded by the vehicle's manufacturer to ensure compatibility with the keyless entry and start system. They are more expensive and take longer to arrive than the aftermarket ones. BimmerTech offers a convenient online ordering system for BMW keys replacement. This will help you save time and money. Some drivers prefer using a smartphone as an “surrogate key” to start their BMW. By using Bluetooth technology, your smartphone can connect to your BMW's keyless entry and start system. This can be particularly useful during hot weather when you don't want carry an oversized BMW key around in your pocket. Valet Key Batteries Key fobs are extremely useful tool, but sometimes you may run out of battery power. This can make it hard to lock your car, and it can also prevent 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, however they're all quite similar. It is easy to replace the newer key batteries that have a slant shape with an easy process. Press the small tab to release the valet key. It can be found on the bottom or side of the fob. Then, you can use a flat screwdriver to remove the access port which 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 an older diamond-shaped key with rechargeable ones. Contrary to the slant-shaped key, they aren't designed to have the battery replaced. They could be damaged if you try to pry off the back plate of the key. You may force it open, but you'll most likely need a professional. It is recommended that if you need to replace the battery, you contact a dealership for professional help. BMW keys are available in a variety of different varieties. Each key fob has its own driver profile, and you can pair them to various drivers in the vehicle. This allows family members to share the same car but still have the ability to personalize their driving experience. This article is most important since you need to know what kind of key you have and how to replace that key. This is essential if you want to ensure that your car will be able to start when you push the buttons on your fob. You will save yourself frustration and money by not having to make an appointment at the dealership when your key doesn't perform as expected.