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BMW Battery Replacement – How to Do it Yourself If your BMW key fob isn't responding to your lock and unlock buttons, or isn't working at all, it probably needs an upgrade to the battery. It's not difficult to replace the battery at home. The battery is replaced by taking the access port off the valet key. You will then need to make sure to register the new battery. How to Replace a Battery A car battery is one of the most important parts of any vehicle and will require replacement at least once during the lifetime of a driver. It's not difficult to replace a BMW battery yourself and you can even save money. Knowing how much work is required to replace batteries is the first step to success with your DIY project. The first step is to determine the type of battery your BMW utilizes. There are three types each with its own pros and cons being used. One of the most popular is a lead-acid battery, that is made up of lead and sulphuric acid. It produces electricity through chemical reactions and recharges itself by using the power of your BMW. Other battery types in BMWs include Gel or Absorbent Glass Mat. These batteries have similar operation however they require a different installation and handling. It's time to replace your old battery when you know which one your BMW utilizes. Many auto parts stores have systems that match your BMW's make and model with the right battery, which can save you time. You can also look up your owner's guide which will include the type of battery required for your specific model. To replace the battery in a BMW key fob, turn off your car and then remove the metal blade of the valet key or flat screwdriver to reach the lock cylinder. Remove the liner from the fob and locate the battery. After taking the batteries out, clean the terminal connectors and then carefully reinstall them. Make sure to not put too much tension on the brackets and this could cause cracks in the battery case. Connect the positive terminal first and then the negative. Then, connect the upholstery in its normal position. Registering your new battery is also an excellent idea to do. This will let the engine control module, also known as the DME and the DME know that you have an updated battery and it won't get confused about which one to charge. This will also reset the battery's age data to avoid charging too much for the new BMW battery. How to Replace a CR2032 battery It's frustrating to lose your key fob, however replacing the battery is easy. It takes just 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 slightly more expensive than other types of batteries, however they are easily found at any convenience store or parts center. Once you have the new battery, simply take the old one off and put in the new one, and then put the cover of the fob back on. This is a simple procedure that will allow you to restart your car in no time. A dead battery is likely to be the reason for your BMW key fob not functioning while you are driving around Johns Creek. It's easy to fix. Press the small tab on the back of the BMW key fob to open the valet key. There will be a small port close to the battery once the key fob has been opened. The battery cover is removed using a flat-headed screwdriver, or any other similar tool. If you're looking for an all-new BMW or a used car near Decatur Be sure to check 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 provides convenience and security with the push of one button. However, over time, the battery inside the BMW key fob can weaken and require replacement to continue working correctly. Knowing how to replace the BMW key fob can help you get to the road again quickly and easily. There are many different types of BMW keyfobs. However they all have the same type of battery, which is a CR2450 coin cell battery. The small round battery is sold in a majority of stores for less than $1 per unit. CR2450 batteries are able to be installed and removed from the key fob. To replace the CR2450 batteries in your BMW look for the tab that opens the valet made of metal inside the fob. After the metal valet key is removed, search for an access port that is small on the front of the fob which conceals the key battery cover. Utilizing a flat screwdriver remove the cover and expose the battery. After the old battery has been removed, replace it with a brand new one with the positive side facing up and then rebuild the key fob. Test the key fob after the battery is replaced to confirm that it is still working properly. If the key fob still fails to respond, consult your BMW dealership for further troubleshooting assistance. The older BMW models might require the key fob and the vehicle to be re-synchronized following a change in the battery, however this isn't the norm for BMWs made in recent years. bmw keys replacement G28 Car Keys is possible to replace the battery inside an old BMW key fob, by opening the case and then soldering an alternative one into. However, this procedure should not be used since it could cause damage to the internal circuitry. Instead, Tulley BMW of Nashua suggests following the steps in this guide to change the CR2450 battery in the majority of BMW key fobs. This easy task can be done in just a few minutes and will help you get back on the road sooner. How to Replace a CR2032 Side Indent Battery It is easy to replace the CR2032 side-indent battery that is found in BMW series 1 keyfobs (and other models). The battery is shaped as a nickel, and it pops in and out of the slot very easily. Simply use your fingers to take out the battery that was in use, and then replace it with a new one, making sure to match the opposite polarity. You can also find replacement batteries in various auto parts stores as well as on the internet. The procedure differs slightly in the event that your BMW is equipped with a “diamond key fob”. 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 whether it works by shimming the CR2016 with aluminum foil that is conductive. 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 small access port found on many BMW key fobs can be opened using the edge of a different key's metal blade or a screwdriver with a flat head. If you don't have an edged blade made of metal, you can use the tip of pen. After you have removed the cover, the CR2032 batteries will be clearly visible. The CR2032 side-indent battery is not designed to be maintained and the case cannot be opened. The battery can be recharged, and will charge when you insert the ignition key. It's a good idea to have a spare key in case your remote gets damaged or lost. Contact us at Tulley BMW Nashua if you need assistance programming your BMW remote or if you need to replace a dead cell. We have a dedicated team of experts available to answer any questions or concerns. We are looking forward to hearing from you!