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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 on the internet, but you need to find a vendor who is specialized in car keys with good reviews. It is also recommended that you visit the dealership to make sure your replacement key is properly programmed. Smart Keys A lot of new BMW models come with a smart-key system that lets you lock and unlock your vehicle by simply turning the steering wheel. Some models also have remotes that allow you to start the engine and close the sunroof and windows from an extended distance. These advanced keys use radio to lock and unlock, and infrared to connect with dashboard. The IR circuit is powered by an infrared link with two ways that transmits and receives commands from the dashboard, and also to the receptacle within the key. This allows the key to control the car from a couple of meters away. The key also has an RF coil that receives the car's remote lock signal and transmits it 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 with a friend all you need to do is pair the key with an iPhone and follow the instructions on your device. This will enable you to share an electronic key that will work when the phone is turned on and is within Bluetooth range. Unlike older car key fobs, which transmit the same frequency repeatedly (which could impact other models and makes that use the same system, and could making it easier for tech-savvy thieves to steal cars), modern smart keys broadcast a different encrypted signal each time they're used to open or close a door, or open the trunk. The antennas in the vehicle respond by generating a corresponding frequency in order to identify the key, and then unlock or open it. Smart key systems may be vulnerable to hacking however. An experienced professional can be able to take over IR transmissions and gain access to your vehicle. To protect yourself, always keep a backup key on hand or make sure to leave the smart key at home when you go out to eat or shopping. If you do lose your keys, be sure you have the VIN number of your BMW and a government ID in case you need to get a replacement from the dealer. Key Fob Batteries The key fob is an essential element of the BMW driving experience, offering convenience and security by pressing one button. However, like everything that is dependent on a battery, the key fob's battery will eventually die, often at the most inconvenient time. Fortunately replacing the battery of a BMW key fob's battery is easy and quick. To replace the battery in the key fob open the fob in the seam that connects its two halves. The fob's backplate is usually fixed by a notch that can be opened using a finger or a screwdriver with a flat blade. After the backplate is removed, you can insert a new button cell battery in the slot. The new battery is typically shaped like a small coin, with plus and minus symbols printed on it. Inject the new battery into the fob in the same way that you used to insert the old battery, and then connect the two halves. After replacing the battery on the key fob make sure to press each button to test whether it functions as you expect. Based on the model, you could need to reconnect your key fob to your vehicle, or take other steps to make sure it works properly. Consult the owner's manual of your BMW for detailed instructions on how to sync the key fob. A dead or weak battery in your key fob can reduce the range the signal can communicate with the car, limiting the ability to lock or unlock the trunk or doors, or arm or disarm your alarm system. If you notice that you have to stand closer and closer to your vehicle to unlock the key fob, or unlock or start the engine, it is likely time to replace the battery. The battery replacement for the key fob is a simple task that can be accomplished at home. After replacing the battery, you should check the functionality of the keyfob by locking and unlocking your vehicle or placing it in the ignition. Reassemble the keyfob and test it once more to ensure that it's working as intended. If you know the moment when a key fob's batteries needs to be replaced, knowing how to change the battery, and knowing how to start your car with a the battery of your key fob that is dead then you'll be on your way to taking advantage of all of your BMW's convenient and secure features. Slant Shaped Key Batteries If you're a BMW owner, you probably take a lot of advantage of the keyless entry and ignition features. These features can make driving your BMW more comfortable and may even assist you avoid common automotive issues. If how much are bmw replacement keys paying attention to the indicators that your BMW keyfob battery is low, it could quickly be out of charge. When your BMW key fob is dead, it's no longer in a position to communicate with the vehicle's computer to unlock or start the engine. The battery in most BMW keys can be replaced easily. The process is simple and usually takes just a few minutes to complete. Keep a spare BMW in your pocket to recharge the battery if it gets depleted. The most important thing to remember when changing a BMW key fob battery is to select the right replacement 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 from 2011 to 2017 will require the CR2032 type of battery. Both types are available at the majority of auto shops as as department stores at an affordable price. Another option is to purchase an alternative key for your BMW from a locksmith or dealership. These keys are laser-cut and coded by the car manufacturers to ensure compatibility with keyless entry and starting systems. The disadvantage is that they 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. While the most common way to start your BMW is with a traditional key certain drivers prefer using their smartphones as an “surrogate” key. Your smartphone can connect with the keyless entry and start system using Bluetooth technology. This is especially helpful during hot weather, when you don't wish to carry a heavy BMW Key in your pocket. Valet Key Batteries Key fobs are a extremely useful tool, but sometimes you may run out of battery power. This could make it difficult to lock your car, and it can also prevent you from being able to turn on the engine and drive. It is easy to change the battery in a BMW keyfob. The steps can vary slightly depending on the kind of key you own, but they are all fairly similar. The latest slant-shaped key batteries are simple to replace using a a simple process. Press the small tab to release the valet key. This can be found on the bottom or the side of the fob. The battery can be accessed 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 can be a challenge to replace a battery on an older diamond-shaped key with a rechargeable one. The keys are not designed to be replaced using batteries, and could be damaged if you attempt to pry the backplate off. You can force it open, but you'll most likely need an expert. If you're looking to replace an old battery it is recommended to contact a dealer to get it done properly. Another thing to take into consideration is that there are different kinds of BMW keys to choose from. Each of these key fobs has its own driver profile, and you can pair them to different drivers in your vehicle. This allows family members to use the same vehicle and still be able to customize their driving experience. This is the most important part since you need to be aware of the type of key you own and how to replace it. This is crucial if you want to ensure that your car will start when you push the buttons on your fob. This can help you avoid frustration if the key isn't functioning correctly, and can also save you lots of money if you're not forced to make a repair appointment at the dealership.