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How to Replace a BMW Key The cost of replacing the BMW key can be expensive. This is due to the fact that BMW keys are highly-technical and require reprogramming in order to work with your vehicle. A new BMW key online will save you money, however it is important to find a seller that specializes in car keys and has positive reviews. It is also recommended that you visit the dealership to make sure that your new key is properly programmed. Smart Keys Keys Nowadays, a lot of new BMW models come with a smart key system that allows you to lock and unlock your car with just a click of a button on the steering wheel. Some models also have remote systems that allow you to start the engine and close the windows and sunroof from a distance. These advanced keys make use of radio to lock and unlock, and infrared to connect with dashboard. The IR circuit is a two-way infrared link that sends and receives commands from and to the dashboard, in addition to the receptacle within the key. This lets the key control the car from a couple of meters away. The key has an RF coil which picks up and transmits the remote signal to lock the car to the dashboard. These smart keys can also be used to save information such as power seat and mirror settings. If you want to share access with a friend all you have 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 as long as their phone is connected and within Bluetooth range. Modern smart keys, as opposed to older key fobs for cars that transmit the same frequency repeatedly (which could harm cars using the same system, making it easier for criminals with tech skills to steal cars), broadcast a different encrypted message each time they're used to open or close the door or to open the trunk. The radio antennas in the vehicle respond by emitting the appropriate frequency to identify the key, lock it or start it. Hacking is possible but not impossible. A skilled professional could be able to intercept IR transmissions and gain access to your vehicle. Always keep a spare key in your vehicle, or leave your smart key at home if you plan to go out to eat or shop. If you lose your keys, be sure you have the VIN number of your BMW and your government ID in case you need to get a replacement from a 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. The key fob battery can also go out of service, as with everything powered by batteries. This happens at the worst time. Fortunately the replacement of the battery of a BMW key fob's battery is easy and quick. Open the fob along the line that connects the two halves. The backplate of the fob is typically held in place by a notch which can be opened with either a finger or a screwdriver with a flat blade. After the backplate is removed, place a brand new button cell battery in its place. The new battery is usually shaped as a small coin and has plus and minus symbols printed on it. Insert the new battery into the fob in the same orientation that you used to insert the old battery and then join the two halves. After replacing the battery on the key fob Press each button to ensure that it works as expected. Based on the model you have you may have to re-sync the key fob with your vehicle or follow other steps to ensure that it functions properly. Refer to bmw 1 series replacement key g28carkeys.co.uk of your BMW for more detailed instructions on how to sync the key fob. A dead or weak battery in your key fob may limit the range at which the signal can communicate with the car, limiting the capability to lock or unlock the doors or trunk, or arm or disarm your alarm system. If you are noticing that you need to step closer and closer to your car to get the key fob to unlock or start the engine, it is likely time to replace the battery. It's simple to replace the battery on your key fob 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. Then, reassemble the key fob and run a test to make sure it functions correctly. Knowing when the key fob's batteries require replacement and how to replace them, and how to start a vehicle with a dead battery will allow you to take advantage of all of BMW's convenient features. Slant Shaped Key Batteries BMW owners are likely to make the most of the keyless entry system as well as ignition. These features make driving your BMW much more comfortable and could help you avoid some common car problems. If you aren't paying attention to the indicators that your BMW keyfob battery is low, it could quickly run out. If your BMW key fob fails to function, it can't communicate with the computer in the vehicle to unlock the doors or even start the motor. The batteries in the majority of BMW keys can be replaced. The process is simple and typically takes only an hour to complete. Keep a spare BMW in your pocket to charge the battery if it runs out. The most important thing to remember when replacing the BMW key fob battery is to select the right type of replacement battery. The smart key requires a CR2450, while the sleek slant-shaped slant-shaped Comfort Access fobs that were used in a variety of F series models from 2011 until 2017 require a battery CR2032. Both are available at most auto shops and department stores at a reasonable price. A locksmith or BMW dealership can also supply you with the replacement BMW key. The keys are laser-cut and coded by the car's manufacturer to ensure compatibility with the keyless entry and start system. They are more expensive and take longer to arrive than replacement versions. If you're looking to purchase an additional key for your BMW look into BimmerTech's online ordering system to save time and money. Some drivers prefer to use smartphones as an “surrogate key” to start their BMW. Your smartphone can connect with the keyless entry and start system using Bluetooth technology. This can be particularly useful on hot days when you don't wish to carry the weighty BMW key in your pocket. Valet Key Batteries A key fob is a useful tool, but it is possible to run out of batteries. This can make it hard to lock your car, and it could also prevent you from turning on the engine and drive. It is simple to replace the battery in a BMW keyfob. The steps may differ slightly depending on the kind of key you have however they're very similar. The newer slant-shaped batteries for key batteries are simple to replace using a an easy process. Press the small tab to unlock the valet key. It is located on the bottom or side of the fob. You can then employ a flat screwdriver to take out the access port that is hidden by the battery. After removing the old battery, you can replace it with a brand new one. After that, you can put it back together. If you have an older diamond-shaped key with rechargeable batteries 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 could be damaged when trying to pry off the back plate of the key. You can force it open but you'll probably need the help of a professional. If you're looking to replace a battery that is old It is recommended to contact a dealer to get it done by a professional. BMW keys are available in different styles. Each key fob comes with its own driver profile and can be paired to different drivers. This lets family members use the same vehicle but still have the ability to personalize their driving experience. This is a crucial article because you need to know what type of key you own and how to replace that key. This is vital if want to ensure that your car can start when you push the buttons on your fob. You will avoid frustration and save money by not having to make an appointment at the dealership in the event that your key doesn't work properly.