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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 highly-technical and require reprogramming to work with your vehicle. You can save money by purchasing a brand new BMW car key online, but you must locate a dealer who specializes in car keys and has good reviews. It is also recommended to visit a dealer to ensure that your new key is programmed correctly. Smart Keys Today, many new BMW models come with an intelligent key system that lets you lock and unlock your car by simply pressing one button on the steering wheel. Certain models also come with a remote system that allows you to start the engine and close the sunroof and windows from the 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 sends commands from the dashboard, as well as to the receptacle within the key. The key is able to control the car from a distance of just a few meters. The key also features an RF coil that picks up the car's remote lock signal and transmits it to the dashboard. The smart keys can also save information such as mirror and power seat settings. If you wish to share access to a friend, all you need to do is connect the key with an iPhone and follow the instructions on your device. This will permit you to share the key digitally and it can be used when the phone is powered up and in Bluetooth range. Contrary to older key fobs for cars that transmit the same frequency over and over (which could affect other makes and models utilizing the same system, and could making it easier for thieves with a tech background to take cars) Modern smart keys broadcast a different encrypted signal every time they're used to open or close a door or open the trunk. The car's antennas respond by creating a similar frequency in order to recognize the key and unlock or start it. Hacking is possible, but it isn't impossible. A skilled professional can intercept IR transmissions to gain access to your car. Always have a backup key or leave your smart key at home if are going to eat out or shop. If you lose your keys, make sure to have the VIN number of your BMW and your government ID in case you need to get a replacement from the dealer. Key Fob Batteries The BMW key fob provides convenience and security with the push of a single button. But, just like anything that relies on a battery the battery in the key fob can die-often at the worst possible moment. It's easy to replace BMW key fob's batteries. To replace the battery of the key fob you must open the fob at the seam that joins its two halves. The fob's backplate is held in place by a the notch that can be opened with a flat-bladed screwdriver or a finger. After the backplate is removed, insert a new button cell battery in its place. The new battery is typically formed like a small coin, with plus and minus symbols on it. Insert the new battery in the same way as the old one, then snap the fob's two halves together. After replacing the battery After replacing the battery, test it by pressing each of the fob's buttons to ensure they function as expected. Depending on the model, you could have to re-sync your key fob to your vehicle or take additional steps to make sure it functions properly. Refer to the owner's guide of your BMW for detailed instructions on how to re-sync the key fob. A weak or dead key fob battery could reduce the range of the signal it transmits with your vehicle, limiting its ability to lock and unlock trunk and doors, or arm/disarm the alarm system. It is time to replace your battery if find yourself needing to be closer to your vehicle to unlock the doors or start the engine. The battery replacement for the key fob is a straightforward task that can be completed at home. After the battery has been replaced, it's important to verify the function of the key fob by locking and unlocking the vehicle, or placing it in the ignition. Then, you can reassemble the key fob, and then test it again to ensure that it works properly. By knowing when a key fob's battery requires replacement and knowing how to replace the battery, and also how to start your vehicle with the battery of your key fob that is dead you'll be on your way to enjoying all of your BMW's convenient and secure features. Slant Shaped Key Batteries If you're a BMW owner, then you enjoy the benefits of the keyless entry and ignition features. These conveniences make driving your BMW more enjoyable, and they can even help you avoid some common car issues. If you don't pay attentively to the indications that your BMW keyfob battery is low, it could quickly go out. If your BMW key fob is dead it's not capable of communicating with the vehicle's computer in order to unlock or start the engine. Fortunately, the batteries in most BMW key fobs can be replaced cost-effectively. The process is simple and typically takes a few minutes to complete. Keep an extra BMW in your pocket to replace the battery when it runs out. When replacing a BMW keyfob battery, it's important to select the right type of battery. The smart key requires a CR2450 as do the sleek slant-shaped, slant-shaped 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 at most department stores and auto shops at reasonable prices. Another option is to purchase an alternative key for your BMW from the dealership or a locksmith. These keys are laser-cut, and coded by the vehicle's manufacturer to ensure compatibility with the keyless entry and start system. The drawback is that they are more expensive than aftermarket versions and can take longer to arrive. If you're considering purchasing an additional key for your BMW look into BimmerTech's easy online ordering process to save time and money. Some drivers prefer using a smartphone as a “surrogate key” to start their BMW. Through Bluetooth technology, your smartphone can connect to the keyless entry and start system. This is particularly useful on hot summer days and when you don't want to carry a heavy BMW Key in your pocket. Valet Key Batteries Key fobs are very useful tool however, sometimes you might be unable to recharge your battery. This can make it difficult to lock your car, and also stop you from turning on the engine and drive. Luckily, replacing the BMW key fob battery is not difficult and can be done at home. The steps may vary depending on the type of key, however they're all fairly similar. It is simple to replace the more modern key batteries that have a slant shape with an easy process. Press the small tab to unlock the valet key. This can be found on the bottom or side of the fob. You can then make use of a flat screwdriver remove the access port which conceals the battery. Once the old battery is removed, you can put in another one and put everything back together. bmw x5 key replacement can be a challenge to replace a battery on the older diamond-shaped keys with rechargeable ones. In contrast to the slant-shaped keys these are not intended to have the battery replaced. They can be damaged if you try to pry off the back plate of the key. You can attempt to force it open but you'll require the help of a professional to do this. If you're looking to replace a battery that is old it is recommended to contact a dealer to get it done by a professional. BMW keys come in many different varieties. Each key fob has its specific driver profile, and can be connected to different drivers. This allows family members to share a single car while being able to customize their driving experience. This is the most important part since you need to know which kind of key you have and how to replace it. This is vital if want to ensure that your vehicle can start when you push the buttons on your fob. You can avoid frustration and save money by not having to pay for an appointment with the dealership when your key doesn't work properly.