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BMW Battery Replacement – How to Do it Yourself If your BMW key fob isn't working with your locks and unlock buttons or has stopped working altogether it may need a new battery. It's not difficult to replace the battery at home. The battery can be replaced by simply taking the access port off the valet key. replace bmw key fob must then make sure to register the new battery. How to Replace the Battery A car battery is among the most important parts of any vehicle and will need to be changed at least once in the lifetime of a driver. However, replacing a BMW battery does not have to be the most difficult DIY project, and you may even save some money by performing it yourself. The most important thing to do an effective DIY battery replacement is knowing the amount of work is required for the task. It is important to know the type of battery that your BMW uses. There are three kinds of batteries each with their own pros and cons. One of the most common is a lead-acid batteries, which contains sulfuric acid and lead. It produces electricity through an chemical reaction and recharges itself by using your BMW. Other battery types in BMWs include Gel or Absorbent Glass Mat. These batteries function similarly, but require different handling and installation. Once you've got a clear idea of which battery your BMW uses and you know the battery's name, it's time to replace the battery you've had for a while. Many auto parts stores have a system that matches the BMW model and include the correct battery. This can save you time. You can also look up your owner's manual that will list the type of battery required for your specific model. To replace the battery in a BMW key fob, turn off your vehicle and remove the blade made of metal from the valet key or a flat screwdriver to access the lock cylinder. Remove the liner from the fob and locate the battery. After removing the batteries, clean the terminal connectors then carefully reinstall them. Be sure not to tighten the brackets too much, as this could crack the battery case. Connect the positive terminal prior to the negative terminal. Finally, connect the upholstery to its normal position. Registering the battery you have purchased is an excellent idea to do. If you do this, the engine control module (known as the DME) will be aware that the new battery has been installed and won't be confused about which one to charge. This will also reset the battery's age statistics to prevent overcharging your new BMW battery. How do you replace the CR2032 Battery It's a hassle to lose a key fob, but replacing the battery is easy. It takes only just a few minutes and can be done at home. The key fobs that are used in BMW automobiles use CR2032 batteries that are a standard watch battery. They're more expensive than other types of batteries, however they can be found at any convenience retailer or parts store. You can replace the battery by removing the old one and replacing it with a new one. Then, put the fob back in. It's an easy process and you'll be able restart your vehicle in minutes. If you've been driving your BMW around the Johns Creek area, and you realize that your key fob isn't working, it's likely because of a dead battery. It's easy to fix. Press the small tab located on the back of the BMW key fob to open the valet key. You'll notice a small port near the battery once the key fob has been opened. You can make use of a flat screwdriver or similar tool to open the battery cover, then replace it with a fresh one. If you're in search of a new BMW or a used car near Decatur Make sure to look through our inventory at Tulley BMW Nashua. Contact us today if you have any questions regarding our vehicles. We look forward to helping find the perfect vehicle for you! How do you replace a CR2450 battery The BMW key fob is an important component of your driving experience, offering security and convenience at the click of one button. However, over time the battery inside your BMW keyfob can weaken, and it will need to be replaced in order for it to function properly. Knowing how to replace a BMW key fob battery can help you get back on the road swiftly and easily. There are many different types of BMW key fobs most utilize the same type of battery that is a CR2450 or CR2032 coin cell. This small, round battery is typically found in a majority of stores and can be purchased for less than a dollar per unit. In addition to being easily accessible, CR2450 batteries are also very easy to install and remove from the key fob. To replace the CR2450 batteries in your BMW find the tab that releases the valet made of metal inside the fob. Once the metal valet is removed, you can locate the tiny access port that conceals the key battery on the front of the fob. With a flat screwdriver, remove the cover to expose the battery. Install a new battery with the positive side facing up and then reassemble the key fob. Test the key fob after the battery has been replaced to ensure it's still functioning properly. Consult your BMW dealer if the key fob is still not responding. Certain older BMW models require that the key fob be synchronized with the vehicle after replacing the battery. However this isn't the case for BMWs manufactured in recent years. Although it is possible to swap the battery on an older BMW key fob by cutting the case and then soldering into a new battery this method is not recommended since it could damage the internal circuit board. Instead, Tulley BMW of Nashua suggests following the steps in this guide to change the CR2450 battery for most BMW key fobs. This simple task can take just a few moments and get you back on the road. How do you replace a CR2032 Side Indent Battery It is easy to replace the CR2032 side-indent battery found in BMW series 1 keyfobs (and other models). This battery is shaped like a nickel and can be removed and put back into the slot easily. Simply use your fingers to take out the battery that was in use, and then replace it with a new one, making sure that it be in line with the opposite polarity. You can find replacement batteries in a variety of auto parts stores, as well as online. If your BMW has an engraved key fob it is a bit more complex. The CR2016 battery inside this key isn't the same as either a CR2032 or a CR2025 it is not possible to open the case to replace it. You can test if it works by shimming a CR2016 with some aluminum foil that conducts electricity. If it fails to work, you'll have to cut off the fob part of the plastic to expose the battery, and then put into a new one. The tiny access port on most BMW key fobs is accessible with the edge of a different key's metal blade or a screwdriver that is flat. If you don't have a metal blade you can make use of the tip of a pen. Once you have removed the cover, you'll be able to see the CR2032 battery inside. It is important to remember that the CR2032 side indent battery wasn't intended to be serviced, and you aren't able to open the case. The battery can be recharged, and will charge when you insert the ignition key. It's important to have a backup key in case you break your key or lose it. If you need assistance programming your BMW remote or replacing batteries that are dead, call us at Tulley BMW of Nashua. We have a dedicated team of experts available to answer any questions or concerns. We look forward to hearing from you!