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How to Replace a BMW Key The cost of replacing a BMW key can be costly. BMW keys are high-tech and require reprogramming to function with the vehicle. Purchasing a new BMW key online will save you money, however it is important to find a vendor that specializes in car keys and has good reviews. It is also recommended that you visit a dealer to ensure that the replacement key is programmed correctly. Smart Keys Keys Many new BMW models come with the smart-key system that allows you to lock and unlock your car by simply turning the steering wheel. Some models also have remote systems that allow you to start the engine and shut the sunroof and windows from an extended distance. These advanced keys use radio for locking / unlocking as well as infrared (IR) to communicate with the dashboard. The IR circuit powers a bidirectional infrared bridge which transmits commands to and from the dashboard and to the receptacle inside the key. The key is able to control the car from a distance of just a few meters. The key also comes with an RF coil that picks up the remote lock signal from the car and transmits it to the dashboard. These smart keys also store information such as mirror and power seat settings. If you wish to share access to a friend, all you need to do is pair the key to an iPhone and follow the instructions on your device. This will enable you to give them a key that is working when their phone is on and within Bluetooth range. Modern smart keys, as opposed to older car key fobs that transmit the same frequency repeatedly (which could affect cars using the same system and make it easier for tech-savvy criminals to take cars), broadcast a different encrypted message each time they're used to open or close doors or open the trunk. bmw mini key replacement 's embedded radio antennas respond by emitting the appropriate frequency to identify the key, lock it or turn it on. Smart key systems could be vulnerable to hacking however. A skilled professional could intercept the IR transmissions and gain access to your vehicle. Always carry a backup key, or leave your smart key at home if you are going to eat out or shop. If you lose your keys, make sure to keep the VIN number of your BMW and government ID available in case you have to request a replacement from the dealer. Key Fob Batteries The BMW key fob offers convenience and security with the click of a button. The battery of the key fob could also go out of service, as with any device powered by a battery. This occurs at the worst time. Fortunately, replacing the BMW key fob battery is quick and easy. To replace the battery of the key fob open the fob in the seam that connects its two halves. The backplate of the fob is secured by a an opening that can be opened using the flat-bladed screwdriver or finger. After the backplate has been removed, you can insert a new button cell battery in its place. The new battery is typically designed to look like a small coin with plus and minus symbols on it. Place the new battery in the same direction as the previous one, then snap the fob's two halves together. After replacing the battery After replacing the battery, test it by pressing each of the buttons on the fob to ensure they function as you expect. Depending on your model, you may need to re-synchronize the key fob to your vehicle, or follow other steps to ensure that it functions properly. If you need to update the sync of your key fob, consult the vehicle's owner manual for detailed instructions specific to your BMW. A dead or weak battery in your key fob can reduce the range the signal communicates with the car, which can limit the capability to lock or unlock the trunk or doors or arm/disarm the alarm system. It is time to replace your battery if find yourself needing to move closer to your car to unlock the doors or start the engine. It's easy to replace the battery in your key fob at home. After replacing the battery, test the keyfob's functionality by locking and unlocking your vehicle, or placing it in the ignition. After that, reassemble the key fob and run a test to make sure it functions properly. Understanding the time when the batteries of the key fob need to be replaced, how 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 convenient features. Slant Shaped Key Batteries If you're a BMW owner, you likely benefit from the many advantages of the keyless ignition and entry features. These conveniences can make driving your BMW easier and even help you to avoid some common issues with your car. If you don't pay attentively to the indications that your BMW keyfob battery is running low, it will eventually run out. When your BMW key fob is damaged, it's no longer in a position to communicate with the computer in your vehicle to unlock or start the engine. Fortunately, the battery in the majority of BMW key fobs can be replaced relatively cost-effectively. The procedure is easy and typically takes only an hour to complete. If you have a spare BMW key, it's an ideal idea to keep it in your pocket to ensure that you can change the battery if it is depleted of power. When replacing the BMW keyfob battery, it is important to select the right type of battery. A smart key requires a CR2450 battery, while the Comfort Access and sleek slant-shaped fobs that are used in many F-series models between 2011 and 2017 will require the CR2032 battery. Both are available in most department stores and auto shops at a reasonable price. Another option is to get an alternative key for your BMW from an authorized locksmith or dealer. These keys are laser cut and digitized by car manufacturers to ensure compatibility with keyless entry and starting systems. The downside is that these keys are more expensive than replacement keys and can take longer to arrive. BimmerTech provides a simple 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. With Bluetooth technology smartphones can connect to the keyless entry and start system. This can be especially useful during hot weather when you don't wish to carry a heavy BMW key in your pocket. Valet Key Batteries A key fob is an excellent tool, but it is possible to run out of batteries. 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. Fortunately, replacing a BMW key fob battery isn't too difficult and can be done at home. The steps can vary slightly based on the type of key you have however, they're all pretty similar. The newer slant-shaped key batteries are easy to replace with an easy process. Simply press the small tab that releases the inside of the valet key located on the bottom or side of the fob. The battery can be removed by using a flat screwdriver. After you've removed the old battery you can replace it with a new one. Then put everything back together. It isn't easy to replace a battery in an older diamond-shaped key with rechargeable one. The keys are not designed to be replaced using batteries, and could be damaged if you try to pry off the backplate. You may force it open, but you'll most likely need an expert. It is recommended that if you need to replace batteries, you call a dealership for professional help. BMW keys are available in different designs. Each key fob has its specific driver profile, and can be paired to different drivers. This makes it simpler for family members to share a car and still be in a position to personalize their driving experience. This article is most important because you need to be aware of the type of key you own and how to replace that key. This is crucial if you want to ensure that your car will start when you press the buttons on your fob. This will save you from frustration when the key is not working correctly, and can also save you a significant amount of money if you're not required to pay for a service appointment at the dealership.