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BMW Battery Replacement – How to Do it Yourself If your BMW keyfob does not respond to the lock or unlock buttons, or isn't working at all, then you may need an entirely new battery. Luckily, it's easy to replace the battery at home. The battery can be replaced by taking the access port off the valet key. The Keylab will then need to make sure to register the new battery. How to replace the battery A car battery is one of the most vital components of any vehicle. It will have to be replaced at least once in a driver's lifetime. However, replacing the BMW battery isn't necessarily the most complicated do-it-yourself project, and you may even save some cash by doing it yourself. The most important thing to do a successful DIY battery replacement is knowing the amount of work is required for the task. The first step is to determine which type of battery your BMW utilizes. There are three types of batteries, each with their own pros and cons. One of the most common is a lead-acid batteries, which contains lead and sulphuric acid. It generates electricity by an chemical reaction, and it recharges itself whenever you use your BMW. Other types of batteries in BMWs include Gel or Absorbent Glass Mat. These batteries perform the same way however they require a different installation and handling. It's time to replace your old battery once you know which one your BMW uses. The majority of auto parts stores have batteries that are compatible with the BMW model and use the right battery. This will save you time. You could also look in your owner's manual which will likely list the battery type required for your specific model. To change the battery in the BMW key fob, shut off your vehicle and remove the metal blade of the valet key, or a flat screwdriver to access the lock cylinder. Then, take off the fob's liner and locate the battery. After you have removed the battery, clean the terminal connections, and then reinstall them using careful. Be sure not to tighten the brackets too tightly and this could cause cracks in the battery case. Connect the positive terminal first, then the negative. Finally, connect the upholstery to its original location. It's also a good idea to register your new battery. This will allow the engine control module, also known as the DME and the DME know that you have new batteries and it won't be confused about which one to charge. This will also reset the battery's age data to avoid charging too much for your new BMW battery. How to Replace a CR2032 battery It's frustrating to lose a key fob, however replacing the battery is easy. It takes just a few moments and can be done at home. BMW key fobs are powered by CR2032 watches batteries. They are more expensive than other ones, but they can be purchased at any convenience store or auto parts center. When you've purchased a new battery, simply remove the old one and replace it with the new one, and then put the cover of the fob back on. It's a quick process, and you'll be able to start your car in minutes. A dead battery could be the reason for your BMW key fob not working when you're driving around Johns Creek. It's easy to fix. First, you'll need press the small tab on the back of your BMW key fob to open the inside valet key. You'll see a small port near the battery once the key fob is opened. You can make use of a flat screwdriver, or similar tool to open the battery cover, and then replace it with a new one. If you're in search of an all-new BMW or a pre-owned car near Decatur, then be sure to look through our inventory at Tulley BMW Nashua. If you have any questions regarding our vehicles, please contact us now. We're looking forward to helping you find the perfect vehicle for your needs! How do you replace a CR2450 battery The BMW key fob is an important component of your driving experience, offering security and convenience with the touch of one button. However, over time the battery in your BMW key fob may be damaged, and need to be replaced for it to work effectively. Understanding how to replace the BMW key fob will aid you in getting back to the road again quickly and easily. Although there are a variety of types of BMW key fobs, the majority of them utilize the same type of battery, a CR2450 or CR2032 coin cell battery. This small, round battery can be typically found in a majority of shops and can be bought for less than a dollar per unit. CR2450 batteries can be easily installed and removed from the key fob. To replace the CR2450 battery in your BMW first locate the key fob's tab which opens the metal valet key inside the fob. Once the metal valet has been removed, locate the small access port that conceals the key battery on the front of the fob. Utilizing a flat screwdriver remove the cover to expose the battery. Replace the battery with the positive side facing upwards, and then reassemble your key fob. Test the key fob after the battery has been replaced to ensure it is still working properly. Consult your BMW dealer if your key fob is not responding. Some older BMW models require that the key fob is synchronized with the vehicle after changing the battery. However this isn't the case for BMWs manufactured in recent years. Although it is possible to replace the battery in an older BMW key fob by cutting open the case and soldering into a new battery this method is not recommended as it can damage the internal circuit board. Tulley BMW Nashua suggests that you follow the instructions in this guide to changing the CR2450 batteries in the majority of BMW keyfobs. This simple task can take only a few minutes to return you to the road. How do I replace the CR2032 Side Indent Battery It is simple to replace the CR2032 side-indent battery that is found in BMW series 1 keyfobs (and other models). The battery looks like a penny and slides into the slot easily. Replace the battery you have used before with the new one by using your fingers. Make sure you ensure that the polarity is in line. There are replacement batteries at many auto parts stores as well as on the internet. The process differs slightly if your BMW is equipped with a “diamond key fob”. It is not possible to replace the CR2016 battery since it's different from a CR2032, CR2025 or a CR2032. However you can try shifting a CR2016 cell using conductor foil to see whether it works. If it fails, you'll need to cut off the plastic fob and expose the battery. Then, you can solder to a new battery. The majority of BMW key fobs come with an access port which can be opened by using the edge of a metal blade from a different key or a flat screwdriver. If you don't have an edged blade made of metal, you can use the tip of pen. After you have removed the cover and the CR2032 batteries are visible. The CR2032 side-indent battery is not designed to be maintained and the case is not opened. This battery is rechargeable, and will charge when you insert the ignition key. It's a good idea to have a spare key in case your fob is damaged or lost. Contact us at Tulley BMW Nashua if you need help programming your BMW remote, or replacing a dead cell. We have a dedicated team of experts who are available to address your questions or concerns. We are looking forward to having a conversation with you!