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How to Replace a BMW Key Replacement of a BMW key is costly. This is due to the fact that BMW keys are highly-technical and require reprogramming in order to function with your vehicle. You can save money by purchasing a brand new BMW car key online, but you must locate a dealer who is an expert in car keys and has good reviews. It is also recommended that you visit a dealer to ensure that your replacement is properly programmed. Smart Keys Keys Many of the latest BMW models come with an intelligent-key system that lets you lock and unlock your car by simply pressing the steering wheel. In addition, some models also come with a system that lets you start the engine from a distance, and also remotely close the windows and sunroof. These advanced keys make use of radio to lock or unlock, and infrared to connect with dashboard. The IR circuit powers a bidirectional infrared bridge that sends commands to and from the dashboard and to the receptacle in the key. This lets the key control the car from a few meters away. The key is equipped with an RF coil that picks up 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. If you wish 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 the key to be shared with them that works when their phone is on and within Bluetooth range. In contrast to older key fobs that transmit the same frequency over and over (which could affect other models and makes using the same system, not to mention 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 vehicle's embedded antennas then respond by creating a similar frequency to identify the key and allow it to unlock or turn it on. Hacking is possible, but not impossible. An experienced professional can be able to intercept IR transmissions to gain access to your vehicle. To ensure your safety, keep a backup key on hand or make sure to leave the smart key at home when going out to eat or out shopping. If you lose your keys, make sure you keep 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 click of a button. The battery for the key fob can also go out of service, as with any device powered by a battery. This happens at the most inconvenient time. It's easy to replace BMW key fob's batteries. Open the fob along the seam which connects the two halves. The fob's backplate is usually held in place by a notch that can be opened with either a finger or a flat-blade screwdriver. After the backplate is removed, you can insert a new button cell battery in the slot. The new battery is likely to appear like a small coin, and have plus and minus signs printed on it. Place the new battery inside the fob with the same orientation as you did with the old battery and then join the two halves. After replacing the battery After replacing the battery, test it by pressing the buttons on the fob to ensure they function as you expect. Based on the model you have you may need to reconnect the key fob with your vehicle or follow additional steps to ensure that it functions properly. If you're required to re-sync your key fob check the owner manual for detailed instructions specific to your BMW. A weak or dead battery for the key fob could reduce the range of the signal that communicates with your car, limiting its ability to lock and unlock the doors and trunk, or arm/disarm the alarm system. If you are noticing that you have to stand closer and closer to your car to get the key fob to unlock or start your engine, it is likely time to replace the battery. Changing the key fob's battery is a simple task that can be done at home. Once the battery is replaced, it's important to verify the function of the key fob by locking and unlocking the vehicle or inserting it into the ignition. After that, reassemble the key fob, and then test it again to ensure it works correctly. By understanding the moment when a key fob's batteries requires replacement, knowing how to change the battery, and knowing how to start your vehicle with the battery of your key fob that is dead then you'll be on your way to enjoying the BMW's convenient and secure features. Slant Shaped Key Batteries BMW owners will likely make good use of the keyless entry system as well as ignition. These features make driving your BMW much easier and could help you avoid some common car issues. If you don't pay attentively to the indications that your BMW keyfob battery is running low, it will eventually go out. If your BMW key fob is dead and is no longer capable of communicating with the computer in your vehicle to unlock or start the engine. The batteries that are found in many BMW keys can be replaced. The procedure is simple and takes just minutes. Keep a spare BMW in your pocket to charge the battery if it runs out. The most important thing to keep in mind when replacing a BMW key fob battery is to select the right type of replacement battery. A smart key will require an CR2450 battery. Likewise, the Comfort Access and sleek slant-shaped fobs utilized in a number of F-series models from 2011 until 2017 will require a CR2032 battery. Both are available at many auto shops as well as department stores at affordable prices. A locksmith or BMW dealership can also provide you with a replacement BMW key. 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 these keys 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 replacement keys. This will help you save time and money. Some drivers prefer using a smartphone as a “surrogate key” to start their BMW. With Bluetooth technology, your smartphone can connect to the keyless entry and start system. This can be especially useful during hot weather when you don't wish to carry an oversized BMW key in your pocket. Valet Key Batteries Key fobs can be an excellent tool, but you may sometimes run out of batteries. This could make it difficult to lock your car and also prevent you from being in a position to start the engine. Fortunately, replacing the BMW key fob battery is not difficult and can be done at home. The steps can differ based on the type of key, however they're fairly similar. It is easy 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. It is located on the bottom or side of the fob. The battery can be accessed with a screwdriver that is flat. After the old battery has been removed, you can put in another one and put it back together. If you have an older diamond-shaped key that has rechargeable batteries it could be more difficult to replace the battery. In contrast to the slant-shaped keys these are not designed to be replaced. They can be damaged when trying to pry off the back plate of the key. You can force it open, but you'll most likely need an expert. If you need to replace an old battery, it is recommended to call an authorized dealer to have it done properly. BMW keys come in many different varieties. new bmw key cost has its own driver profile and can be paired with different drivers. This allows family members to share a vehicle and still be able to customize their driving experience. This is the most important part because you need to know what kind of key you have and how to replace that key. It is crucial to know this if want your car to start once you press 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 significant amount of money if you're not forced to make a repair appointment at a dealership.