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How to Replace a BMW Key The cost of replacing a BMW key can be expensive. This is due to the fact that BMW keys are highly-technical and require reprogramming in order to function with your vehicle. The purchase of a new BMW key online could save you money, but it is essential to choose a seller that specializes in car keys and has good reviews. It is also recommended that you visit the dealership to make sure your replacement key is programmed correctly. Smart Keys Keys A lot of new BMW models come with a smart-key system that lets you unlock and lock your vehicle by simply turning the steering wheel. Some models also feature remotes that allow you to start the engine and shut the windows and sunroof from the distance. These advanced keys make use of radio to lock or unlock and infrared technology to communicate with dashboard. The IR circuit is the source of a bidirectional infrared bridge which sends commands from and to the dashboard as well as to the receptacle within the key. This allows the key to control the car from a few meters away. The key also features an RF coil that detects the remote lock signal from the car and transmits it to the dashboard. These smart keys are also able to store information like power seat and mirror settings. If you want to share access with a friend all you need to do is connect the key to an iPhone and follow the instructions on your device. This will enable you to provide them with the key digitally and it will work when the phone is powered up and is within Bluetooth range. Modern smart keys, as opposed to older key fobs for cars that transmit the same frequency continuously (which could impact cars that use the same system, making it easier for criminals with tech skills to steal vehicles) they transmit a different encrypted message each time they're used to open or close doors or open the trunk. The radio antennas in the vehicle respond by generating the corresponding frequency to identify the key, lock it or open it. Hacking is possible, but it isn't impossible. A skilled professional could take over IR transmissions and gain access to your vehicle. Always keep a spare key in your vehicle, or leave your smart key at home if plan to go out to eat or shop. If you lose your keys, make sure to have your VIN number and ID from the government in case you require a replacement. Key Fob Batteries The key fob is a crucial feature of the BMW driving experience, providing convenience and security with the push of one button. The key fob battery can also go out of service, as with anything that is powered by batteries. This happens at the most inconvenient time. It's simple to replace the BMW key fob's battery. To replace the key fob's battery you must open the fob at the seam that connects its two halves. The backplate of the fob is typically secured by a notch that can be opened using a finger or a screwdriver with a flat blade. After the backplate is removed, place a brand new button cell battery into the slot. The new battery will usually appear like a small coin, and will have plus and minus signs printed on it. Insert the new battery into the fob with the same orientation that you did when inserting the old battery, and then snap the two halves together. After replacing the battery on the key fob, press each button to ensure whether it functions as you expect. Based on g28carkeys.co.uk have you may need to reconnect the key fob to your vehicle or follow other steps to ensure proper function. Check the owner's manual for your BMW for detailed instructions on how to re-sync the key fob. A weak or dead battery in your key fob may reduce the range the signal can communicate with the car, limiting the ability to lock or unlock the trunk or doors, or arm/disarm your alarm system. It is time to replace your battery if you discover that you must get closer to your car to unlock the doors or start the engine. The battery replacement for the key fob is a simple job that can be accomplished at home. After the battery has been replaced, it's important to test the functions of the key fob by locking and unlocking the vehicle, or inserting it into the ignition. Reassemble the keyfob and test it once more to ensure that it is working properly. Understanding when the key fob's batteries need to be changed and 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 useful features. Slant Shaped Key Batteries BMW owners are likely to benefit from the keyless entry system and ignition. These conveniences make driving your BMW much easier and can assist you in avoiding some common automotive problems. If you don't pay attentively to the indications that your BMW keyfob battery is running low, it may run out. If your BMW key fob dies, it can't communicate with the computer in the vehicle to unlock the doors or even start the motor. Fortunately, the batteries in most BMW key fobs is replaceable inexpensively. The procedure is easy and usually takes just an hour to complete. Keep a spare BMW in your pocket to recharge the battery if it gets depleted. The most important thing to remember when replacing a BMW key fob battery is to choose the correct replacement battery. A smart key will require a CR2450 battery, while the Comfort Access and sleek slant-shaped fobs that are used in a variety of F-series models from 2011 to 2017 will require the CR2032 battery. Both are available in most auto shops as well as department stores at affordable prices. Another option is to get an alternative key for your BMW from the dealership or a locksmith. These keys are laser-cut, and coded by the car's manufacturer to ensure compatibility with the keyless entry and start system. These keys are more expensive and take longer to arrive than the aftermarket ones. 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 to use a smartphone as an “surrogate key” to start their BMW. By using Bluetooth technology, your smartphone can connect to the keyless entry and start system. This is especially useful during hot summer days and when you don't want to carry around a heavy BMW Key in your pocket. Valet Key Batteries Key fobs are a very useful tool however, sometimes you might be unable to recharge your battery. This could make it difficult to lock your car, and it could also prevent you from being able to turn on the engine and drive. Luckily, replacing the BMW key fob battery isn't difficult and can be done at home. The steps may differ a little depending on what kind of key you own however, they're all very similar. It is simple to replace the key batteries that have a slant shape with an easy procedure. Press the small tab to release the valet key. It is located on the bottom or side of the fob. Then, you can use a flat screwdriver to remove the access port that is hidden by the battery. After removing the old battery, you can replace it with a new one. After that, you can put it back together. It can be difficult to replace a battery on an older diamond-shaped key with rechargeable one. Contrary to the slant-shaped key, these are not designed to have the battery replaced. They could be damaged by trying to remove the back plate of the key. You can attempt to force it open, but you will likely require the assistance of a professional for doing this. If you are looking to replace a battery that is old it is recommended to call a dealer to get it done by a professional. Another thing to take into consideration is the fact that there are a variety of different kinds of BMW keys available. Each key fob comes with its specific driver profile, and can be connected to various drivers. This allows family members to share a car while being in a position to personalize their driving experience. This is the most important part because you need to be aware of the type of key you own and how to replace that key. It is important to know this if you want your car to start once you push the buttons on your key fob. You can avoid frustration and save money by not having to make an appointment with the dealership when your key doesn't work properly.