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How to Replace a BMW Key The cost of replacing the BMW key could be expensive. This is because BMW keys are high-tech and require reprogramming to function with your vehicle. You can save money by purchasing a brand new BMW car key online, but you should find a seller who is specialized in car keys and has good reviews. It's also recommended that you visit a dealership to ensure that your replacement is programmed correctly. Smart Keys Keys Nowadays, a lot of new BMW models come with an intelligent key system that lets you lock and unlock your car with just a click of one button on 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 to lock / unlock, and infrared to connect with the dashboard. The IR circuit is a two-way infrared link that sends commands from the dashboard, as well as to the receptacle in the key. This lets the key control the car from just a couple of meters away. The key also has an RF coil that picks up the remote lock signal from the car and transmits it to the dashboard. These smart keys also have the ability to store information like power seat and mirror settings. To give access to someone else, you need to connect the key to an iPhone and then follow the instructions on your device. This will provide them with a key that is working when their phone is on and within Bluetooth range. Modern smart keys, unlike older car key fobs that transmit the same frequency repeatedly (which could harm cars using the same system and make it easier for cyber-savvy criminals to take cars), broadcast a different encrypted message each time they are used to open or close the door or to open the trunk. The vehicle's embedded radio antennas respond by generating the corresponding frequency to identify the key, lock it or start it. Smart key systems may be vulnerable to hacking, however. A skilled professional can intercept the IR transmissions and gain access to your vehicle. Always carry a backup key, or leave your smart key at home if you plan to go out to eat or shop. If you do lose your keys, make sure to keep the VIN number of your BMW and government ID available in case you have to obtain an exchange from the dealer. Key Fob Batteries The key fob is an important element of the BMW driving experience, offering convenience and security with the push of a button. However, like everything that is dependent on a battery the battery of the key fob can die-often at the worst possible time. It's simple to replace the BMW key fob batteries. Open the fob along the seam that connects the two halves. The backplate of the fob is held in place with a notch which can be opened with the flat-bladed screwdriver or finger. Once the backplate is removed, you can insert a new button cell battery into its place. The new battery will usually appear like a small coin, and will have plus and minus signs printed on it. Place the new battery in the same orientation as the previous one, then snap the fob's two halves together. After replacing the battery, test it by pressing the buttons on the fob to ensure they work as expected. Based on the model of your car, you may need to reconnect the key fob with your vehicle or follow other steps to ensure that it functions properly. Consult the owner's manual of your BMW for detailed instructions on how to sync the key fob. A weak or dead key fob battery can reduce the range of the signal that connects with your car, which can limit its ability to lock and unlock the trunk and doors and arm/disarm the alarm system. It is time to replace the battery if you 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 simple task that can be completed at home. After replacing the battery it is crucial to test the functions of the key fob by locking and unlocking the vehicle, or inserting it into the ignition. Then, you can reassemble the key fob, and then test it again to ensure that it works correctly. By understanding when a key fob's battery must be replaced and how to replace the battery, and knowing how to start your vehicle using a an empty battery from the key fob 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 ignition and keyless entry features. These features make driving your BMW much more comfortable and can aid you in avoiding common automotive problems. If you're not careful about the signs that your BMW key fob battery is getting low, it can quickly become depleted of power. If your BMW key fob is dead it's not able to communicate with the vehicle's computer to unlock or start the engine. Fortunately, the batteries in most BMW key fobs can be replaced relatively cheaply. The process is simple and typically takes only about a couple of minutes to complete. Keep a spare BMW in your pocket to charge the battery if it runs out. The most important thing to keep in mind when changing the BMW key fob battery is to select the correct replacement battery. The smart key requires a CR2450, as do the sleek slant-shaped, slant-shaped Comfort Access fobs, which were available in various F series models from 2011 to 2017, require a battery CR2032. Both are available in the majority of auto shops as as department stores at affordable prices. A locksmith or BMW dealership can also supply you with an alternative BMW key. The keys are laser-cut and coded by vehicle manufacturers to ensure compatibility with keyless entry and start systems. The drawback is that these keys are more expensive than the aftermarket versions and can take longer to arrive. If you're considering purchasing an additional key for your BMW, consider using BimmerTech's convenient online ordering process to save yourself time and money. While bmw car key replacement used method to start your BMW is using keys that are traditional certain drivers prefer to use their smartphones as an “surrogate” key. Through Bluetooth technology, your smartphone can connect to the keyless entry and start system. This is especially helpful on hot days when you don't want carry an oversized BMW key around in your pocket. Valet Key Batteries Key fobs are a very useful tool however, sometimes you might run out of battery power. This can make it difficult to lock your vehicle and stop you from being in a position to start the engine. Luckily, replacing a BMW key fob battery isn't too difficult and can be done at home. The steps can differ based on the type of key, but they're all pretty similar. It is simple to replace the more modern slant shaped key batteries with an easy process. Press the small tab to release the valet key. It is located on the bottom or side of the fob. The battery is accessible by using a flat screwdriver. After you've removed the old battery and replacing it with a new one. Then put everything back together. If you have an older, diamond-shaped key that uses a rechargeable battery It can be tricky to replace the battery. In contrast to the slant-shaped keys these are not designed to have the battery replaced. They can be damaged by trying to pry off the back plate of the key. You can attempt to open it however, you'll require the help of a professional to do the job. If you're looking to replace an old battery It is recommended to call an authorized dealer to have it done professionally. BMW keys are available in a variety of different styles. Each key fob has its own driver profile and can be connected to various drivers. This makes it easier for family members to share a single car and still be capable of adjusting their driving experience. The most important part of this article is that you need to know the type of key you own and how to replace it. It is crucial to know this if would like your car to start when you push the buttons on your key fob. You can avoid frustration and save money by not needing to pay for an appointment at the dealership if your key does not work properly.