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Troubleshooting Problems With BMW Keys BMW keys used to be large, black plastic rectangles. They were inserted into the ignition to begin and unlock the car. The digital key revolutionized everything. But can it be hacked? Do you have to use a keyfob that is not genuine to enable Comfort Access on your BMW? Keyless entry If you've owned a BMW for any length of time you're familiar with remote start and keyless entry. These features are convenient and make driving safer. If you've got the right apps installed on your smartphone you can lock and unlock your vehicle from the comfort of home. However, just like any other new technology keys have certain quirks that can be confusing. Some BMW owners wonder about, for example, whether their key fob could be stolen. BMWs were designed with security and are therefore virtually impossible to hack. The system works by sending a unique identification signal from your fob to the car, which is then checked and then allowed to unlock. This means that other parties cannot copy your fob or use a signal amplifier to gain access to your vehicle. Another issue that people ask is whether or whether the BMW fob sleeps. If the fob isn't used for a set amount of time it will go to sleep. This helps save battery power and prevents the car from opening uninvited. However, the key fob will work in the ignition if it's repeatedly pressed. In addition to keyless entry In addition to keyless entry, the BMW key fob can also lock and unlock the car or activate the automatic transmission of cars that have manual shifters. The BMW key fob will also control some of the vehicle's comfort functions, such as mirror, seat and adjustments to the steering wheel. It can also save personal settings, including presets for the radio and seat position and let owners unlock their BMW by using the MyBMW app on their smartphones. BMW key fobs can be used to unlock a trunk, or to trigger the push-button start on certain models. To do this, simply press the button on the bottom of the fob until it sounds. Insert the key into the trunk opening, then pull it down to unlock the trunk. The BMW key fob is also capable of controlling the car's media system and climate control. Electronic immobilizer The engine immobilizer, which is a security feature, helps to prevent car thefts by ensuring only the correct key can be used to start the vehicle. This is accomplished by using the code on the car's key to the one stored on the computer. The engine will only be able to start when the codes are identical. This system has been in use for more than 20 years and has helped in reducing vehicle theft. It's also a great way to prevent hotwiring, which is the act of bypassing the ignition switch by connecting wires between the ignition coil and the fuel pump relay. The immobilizer is a part of a key fob, or key that has transponder. The chip transmits a passcode to the immobilizer unit of the car that is integrated into the PCM, BCM, instrument cluster or smart junction box or any other module. The immobilizer unit then verifies the passcode and allows the engine to start if it is correct. Modern transponder chips and keys use a cryptographic algorithms to ensure that codes are sent only once, and only through authorized key fobs or keys. These algorithms are designed to be difficult for hackers to decode. This technology also protects against remote key duplication, which is a common instance of stolen vehicles. If the immobilizer does not recognize the code on the key fob or the key it will sound an alarm. It will also disable the fuel pump, ignition coil, or injectors, dependent on the type of engine that is in your car. The engine will start for a short time before it will shut down. It is impossible to drive away. An immobilizer is a great safety feature, and it has reduced the risk of vehicle theft by preventing hot-wiring. However, it's not foolproof, and a lot of criminals have devised methods to defeat the immobilizer. These methods involve using a computer to decode the algorithm. This can be done by using a special program. Another method involves using a device to change the code of the transponder chip, or key. You can purchase the “transponder-reader” on the internet. These devices don't work every time however they can be useful in certain instances. Replace the battery If your BMW keyfob isn't performing the way it used to it may be time to replace replacement batteries. Fortunately, replacing the battery in your BMW is a simple process, and it will take no more than 30 minutes. The first step is to remove the key metal from the fob. Then, push the key into a smaller section to open the backing of the fob. Then, take out the battery that was in use and replace it with a new one. You can find CR2450 Batteries in most supermarkets and petrol stations. Depending on the kind of BMW key you own There are different methods to change the battery. If you own a BMW Smart Key it uses batteries that charge automatically when it is inserted in the ignition. This battery can't be replaced without cutting through the case. You'll have to contact your local BMW dealer. Many BMW models from 2011 to 2017 use the sleek slant-shaped key battery which is also known as watch batteries. It is possible to replace the battery by pressing a button close to the spot where the key comes out of its case, and then taking off the cover. You will notice an opening with a small groove in this opening. Utilize a screwdriver, or valet key to rotate the groove counterclockwise, removing the cover. Once the cover has been removed you can replace the battery that died with a new one. The range of the signal on your BMW key fob is likely to decrease when the battery is not working. You should be able unlock your car from a distance between 30 and 60 feet. If you're not able to get further than 20 feet it's likely time to replace your battery. A damaged or depleted battery can also stop the remote starter from working. This is a critical safety feature in many vehicles, so you should replace the battery as quickly as possible. If you have a BMW with a push button start, you'll have go to the dealer to program the new key fob and sync additional fobs to the vehicle. Replace the key BMW is a luxurious automobile manufacturer that offers an array of models, each with different features. They are renowned for their style, comfort and performance. But, sometimes even the most expensive vehicles can have issues. One of the most frequent issues is the key fob. It may cease to function at any time. This can be a frustrating experience, especially when you are in a hurry to get to a destination. The best solution to address this issue is to replace the battery on your BMW key fob. This is a simple procedure that can be completed at home. The only drawback is that it can take a bit of time. You can purchase an replacement fob and key online from a company that specializes in BMW keys. This will eliminate the hassle of visiting the dealership and waiting for a replacement key. Based on the model of your vehicle, there are a few different types of BMW key fobs. The latest models use Smart Keys, a device that is modern and can lock your vehicle and unlock it. These are usually more reliable than the older BMW keys, but the battery must be replaced when it gets old. Older BMWs which are found in many driveways in Decatur and surrounding areas, could be equipped with a Bladed Key or a Non-Comfort Access Key. The Bladed Key uses a metal key that is placed inside the ignition lock. The Non-Comfort Access Keys were used on certain X3 E83 vehicles between 1996 between 1996 and 2011. They are keys with an indent on the side. To replace the battery on this type of key, you'll require a screwdriver to open the case and remove the dead battery. Next, insert the new battery into the clip or holder. You should also be careful not to scratch the plastic of the key fob or the circuit board within. Once you have the new battery, you can turn the key to position 1 and insert it into the ignition. The car should start, and all lights and other accessories should be turned on. If not, bmw key fob replacement may require a repeat of the procedure.