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BMW Battery Replacement – How to Do it Yourself If your BMW keyfob isn't responding to the lock or unlock buttons, or if it has stopped working completely and you're in need of a new battery. It's easy to replace the battery on your own. The battery is replaced by removing the access port from the valet key. You must then make sure to register the new battery. How to Replace a Battery A car battery is one of the most vital components of any vehicle. It's likely to have to be replaced at least once throughout a driver's lifetime. It's not hard to replace the BMW battery on your own and you can even save money. The key to an effective DIY battery replacement is knowing the amount of work the job actually requires. The first step is to identify the type of battery your BMW utilizes. There are three kinds of batteries each with its own pros and cons. One of the most common is a lead-acid batteries, that is made up of sulfuric acid and lead. It generates electricity by an chemical reaction and it recharges itself when you use your BMW. Other types of batteries that are used in BMWs are Gel or Absorbent Glass Mat (AGM). These batteries operate similarly however they require different handling and installation. Once you've got a good idea of the battery your BMW is using then it's time to replace the battery that was in use. Many auto parts stores have systems that match your BMW's make and model with the right battery, which can save you some time. You can also refer to the owner's manual which will include the type of battery required for your particular model. To change the battery on a BMW keyfob, turn your vehicle off and remove the metal blade from the valet key. You can also use a flat screwdriver or valet keys to open the lock-cylinder. Then, take off the fob's liner and locate the battery. After taking the batteries out, clean the terminal connectors and then carefully reinstall. Make sure to not put too much tension on the brackets and this could cause cracks in the battery case. Connect the positive terminal before the negative terminal. Finally, connect the upholstery in its normal position. It's recommended to register your new battery. If you do this, the engine control module (known as the DME) will know that a new battery has been installed and won't get confused about which one to charge. This will also reset the battery's statistics regarding age to ensure that you don't overcharge the new BMW battery. How to Replace a CR2032 battery A lost key fob can be an inconvenience, but it's also quite simple to replace the battery. It takes only some minutes and can be done at home. The key fobs that are used in BMW vehicles are powered by CR2032 batteries that are a standard watch battery. They're more expensive than other types of batteries, but they are easily found at any convenience store or parts center. You can change the battery by removing the old one and replacing it with a new one. Then, put bmw e46 key replacement G28 on. This is a straightforward process that will allow you to start your car again within a matter of minutes. A dead battery is likely to be the reason behind your BMW key fob not functioning while you are driving around Johns Creek. It's a good thing that it's simple to repair! First, you'll need to press the small tab on the side of your BMW key fob to open the valet key inside. You'll see a small port close to the battery after the key fob has been opened. The cover for the battery is removed using an screwdriver with a flat head, or any other similar tools. If you're in the search for a brand new BMW, or you want to purchase a used vehicle available near Decatur, be sure to browse our inventory at Tulley BMW of Nashua! If you have any questions about our vehicles, don't hesitate to contact us now. We look forward to helping you find the perfect vehicle for your needs! How do I replace the CR2450 Battery The BMW key fob provides security and convenience at the push of one button. Over time, however, the battery in your BMW key fob may be damaged, and require replacement in order for it to work effectively. Knowing how to replace a BMW key fob battery can help you get back on the road swiftly and easily. While there are several different types of BMW key fobs however, they all utilize the same type of battery that is a CR2450 or CR2032 coin cell battery. The small round battery can be found in most stores for less than $1 per unit. CR2450 batteries are easily installed and removed from the key fob. To replace the CR2450 batteries in your BMW find the tab that opens the metal valet inside the fob. When the metal valet keys is removed, search for an access port that is small on the front of the fob that covers the key battery cover. Remove the cover using an open-ended screwdriver to expose the battery. Insert a new battery with the positive side facing up, and then reassemble your key fob. After the new battery is installed Test the key fob to ensure that it functions in a proper manner. Check with your BMW dealer if your key fob isn't responding. Older BMW models may require the key fob as well as the vehicle to be re-synchronized after changing the battery, but this is not typical for BMWs produced in recent years. Although it is possible to swap the battery in an older BMW key fob by cutting the case and soldering to a new battery, this method is not recommended since it can damage the internal circuit board. Instead, Tulley BMW of Nashua suggests following the instructions in this article to change the CR2450 battery for most BMW key fobs. This easy task can be done in a matter of minutes and can help you get back on the road faster. How do I replace the CR2032 Side Indent Battery It is easy to replace the CR2032 side-indent batteries found in BMW series 1 keyfobs (and other models). This battery looks like a penny and is easy to insert into the slot. Replace the battery that was used with the new one using your fingers. Make sure to match up the polarity. There are replacement batteries in a variety of auto parts stores, as well as online. If your BMW has an engraved key fob, the process is slightly more complicated. The CR2016 battery in this key isn't identical to a CR2032 or a CR2025 it is not possible to open the case to replace it. You can test if it functions by shimming the CR2016 with some aluminum foil that conducts electricity. If you are unable to get it to work, you will need to cut off the fob plastic piece to expose the battery and solder into an alternative one. The tiny access port on most BMW key fobs can be opened with the edge of a key's metal blade or screwdriver that is flat. If you don't own an edged metal blade, you can make use of the edge of pen. When you take off the cover, the CR2032 batteries will be evident. It's important to note that the CR2032 side indent battery isn't designed to be serviced and you can't open the case. It is rechargeable and charges when the key is inserted into the ignition. It's a good idea to have a spare key available in case your fob is damaged or lost. Contact us at Tulley BMW Nashua if you need assistance programming your BMW remote, or replacing a dead phone. We have a dedicated team of experts who are available to answer any questions or concerns. We look forward hearing from you!