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BMW Battery Replacement – How to Do it Yourself If your BMW key fob isn't responding to the locks and unlock buttons or has stopped working altogether it may need an upgrade to the battery. It's easy to replace the battery yourself. It is enough to find the access port inside the valet key, take it out, it, and then replace the battery to a new one. After that, you need to register the replacement battery. How to replace a battery A car battery is among the most important parts of any vehicle. It will require replacement at least once during the lifetime of a driver. It's not difficult to replace the BMW battery yourself and you could even save money. The most important thing to do a successful DIY battery replacement is knowing how much work it will take. It is essential to be aware of the type of battery that your BMW utilizes. There are three different types each with its own pros and cons being used. Lead-acid batteries are the most common since they are made up of sulfuric acids and lead. It generates electricity by a chemical reaction, and it recharges itself when you use your BMW. Other types of batteries that are that are used in BMWs are Gel or Absorbent Glass Mat (AGM). These batteries operate similarly but require different handling and installation. Once you've got a clear idea of which battery your BMW is using, it's time to replace the battery you've had for a while. The majority of auto parts stores have systems that match your BMW's make and model with the appropriate battery, which could help you save time. You could also look at the owner's manual, which will likely include the battery type that is required for your specific model. To change the battery of a BMW keyfob, turn your vehicle off and take the metal blade from the valet key. You can also make use of a flat screwdriver or a valet key to access the lock-cylinder. Remove the liner from the fob and locate the battery. After taking the batteries out, clean the terminal connectors then carefully reinstall them. Do not tighten brackets too tight, as they could break the battery case. Connect the positive terminal first, before the negative terminal. Finally, reconnect the upholstery to its normal position. Registering your new battery is an excellent idea to do. If you do this, the engine control module (known as the DME) will know that the battery has been installed and won't be confused as to which one to charge. This will also reset the battery's age data to avoid charging too much for your brand new BMW battery. How do you replace the CR2032 Battery A lost key fob can be difficult, but fortunately, it's also fairly easy to replace the battery. It takes only some minutes and can be done at home. The key fobs that are used in BMW automobiles use CR2032 batteries, which are a common watch battery. They are more expensive than other ones, but they can be found at any convenience store or auto parts store. If you've got a new battery, simply remove the old one, fit in the new one, and put the cover of the fob back on. This is a simple process that will allow you to restart your car in no time. If you've been driving your BMW around the Johns Creek area, and you realize that your key fob isn't functioning, it's likely because of an inoperative battery. It's easy to fix. Press the small tab on the side of the BMW key fob to release the valet key. You'll see a small port near the battery after the key fob is opened. You can make use of a flat screwdriver or similar tool to remove the cover of the battery, and then replace it with a brand new one. If you're in the need of a new BMW, or you want to buy a used car to sell near Decatur, be sure to look through our inventory at Tulley BMW of Nashua! Contact us today if you have any questions regarding our vehicles. We look forward to helping you find the perfect vehicle for your needs! How to Replace a CR2450 battery The BMW key fob is a crucial part of your driving experience, providing security and convenience with the touch of the button. However with time the battery inside the BMW key fob will become weak and need replacement in order to function properly. Knowing how to replace the BMW key fob battery will allow you to get back on the road swiftly and quickly. Although there are a variety of kinds of BMW key fobs, the majority of them use the same battery type such as CR2450 or the CR2032 coin cell. This small, round battery is sold in most stores for less than $1 per unit. In addition to being readily available, CR2450 batteries are also very easy to install and take off from the key fob. To replace the CR2450 battery in your BMW first look for the tab on the key fob that releases the valet key made of metal inside the fob. Once the metal valet key is removed, look for an access port that is small on the front of the fob which hides the key battery cover. Remove the cover with a flat-headed screwdriver to reveal the battery. Once the old battery is removed, insert a new one with the positive side facing upwards and then put it back together. Test the key fob after the battery is replaced to confirm that it's working as intended. Check with your BMW dealer if the key fob isn't responding. Some older BMW models require that the key fob is synchronized with the vehicle after changing the battery. However, this is not the case with BMWs produced in recent years. It is possible to replace the battery inside an old BMW key fob, by opening the case and soldering a new one in. However, this method should not be attempted as it may harm the internal circuitry. Instead, Tulley BMW of Nashua suggests following the steps in this article to change the CR2450 battery on the majority of BMW key fobs. This simple task can take only a few minutes and will get you back on the road. How do I replace a 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). This battery looks like a penny, and is easy to insert into the slot. Replace the battery you have used before with the new one using your fingers. Make sure you make sure that the polarity matches. You can also find replacement batteries at various auto parts stores as well as on the internet. If your BMW has diamond key fobs the procedure is slightly more difficult. The CR2016 battery inside this key isn't identical to a CR2032 or a CR2025 however, and you are unable to open the case to replace it. However you can try shifting a CR2016 cell using conductive foil to see whether it works. If it doesn't work, 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 have an access port that can be opened with the edge of a blade made of metal from another key or a flat screwdriver. If you don't have a metal blade or a flat screwdriver, you can use the pencil's tip. After you've removed the cover, you'll be able to see the CR2032 battery that's inside. It is important to remember that the CR2032 side indent battery isn't designed to be serviced and you can't open the case. The battery can be recharged and will charge when the key is placed in the ignition. It is essential to have a backup key in case you accidentally break your fob or lose it somewhere. If you need help programming your BMW remote or replacing batteries that are dead, call us at Tulley BMW of Nashua. g28carkeys have a team of committed experts who can assist you with any questions or concerns. We look forward hearing from you!