Say "Yes" To These 5 BMW Battery Replacement Key Tips BMW Battery Replacement - How to Do it Yourself

If your BMW keyfob does not respond to the lock or unlock buttons, or if it has stopped working entirely it could be time to get an entirely new battery. It's not difficult to replace the battery at home.

It is enough to find the access port that is hidden within the valet key, then remove it, and then replace the battery to a new one. After that, you need to register the replacement battery.

How to Replace the Battery

A car battery is one of the most important parts of any vehicle. It's likely to have to be replaced at least once during the life of a driver. It's not difficult to replace a BMW battery yourself, and you may even save money. The most important thing to do an effective DIY battery replacement is knowing the amount of work the job actually requires.

The first step is to determine the type of battery your BMW uses. There are three types, each of which has its own pros and cons when in use. One of the most popular is a lead-acid batteries, which is composed of lead and sulphuric acid. It produces electricity by chemical reactions and then recharges itself using the power of your BMW. bmw key fob found in BMWs include Gel or Absorbent Glass Mat. These batteries are similar in operation, but require different handling and installation.

Once you've got a good idea of the battery your BMW is using, it's time to replace the battery that was in use. Many auto parts stores have a system that matches the BMW model and include the correct battery. This can save you time. You may also want to look in your owner's manual which will likely contain the type of battery required for your particular model.

To change the battery on a BMW keyfob, turn your vehicle off and take the metal blade from the valet key. You can also employ a flat screwdriver, or valet keys to gain access to the lock-cylinder. Then, take off the fob's liner, and locate the battery. After removing the battery, clean the terminal connections, and then put them back in place with careful. Make sure to not put too much tension on the brackets, as this could crack the battery case. Connect the positive terminal before the negative terminal. Finally, connect 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 be aware that a new battery is installed and won't be confused as to which one to charge. This will also reset the battery's age statistics to prevent overcharging your brand new BMW battery.

How to Replace a CR2032 battery

A lost key fob can be an inconvenience, but it's also fairly easy to replace the battery. It takes only a few moments and can be done at home.

The key fobs in BMW vehicles are powered by CR2032 batteries that are a standard watch battery. They're slightly more expensive than other kinds of batteries, but they can be found at any convenience store or parts centre. 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 to start your vehicle again in no time.

A dead battery could be the cause of your BMW key fob not working when you are driving around Johns Creek. It's simple to fix.

Press the small tab on the back of the BMW key fob to release the valet key. When the key fob is opened, you'll see an access port in the middle in which the battery is. The battery cover is removed using the flat-headed screwdriver or other similar tool.

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How do I replace the CR2450 Battery

The BMW key fob provides convenience and security with the touch of one button. However, over time, the battery in your BMW key fob will become weaker, and will require replacement in order for it to work correctly. Knowing how to replace the BMW key fob battery will allow you to get back on the road swiftly and easily.

Although there are a variety of types of BMW key fobs however, they all utilize the same type of battery, a CR2450 or CR2032 coin cell. This small, round battery is often found in shops and can be bought for less than a dollar for each unit. CR2450 batteries are able to be 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 key is removed, search for a small access port on the front of the fob which covers the key battery cover. Take off the cover using a flat-headed screwdriver, revealing the battery. Replace the battery with the positive side up, and then reassemble your key fob.

Test the key fob after the battery has been replaced to make sure it's still functioning properly. Contact your BMW dealer if your key fob is still not responding. Certain older BMW models require that the key fob be synchronized with the vehicle after changing the battery. However, this is not the case for BMWs manufactured in recent years.

It is possible to replace the battery inside an old BMW key fob, by opening the case and then soldering the new battery in. However, this procedure should not be attempted as it may cause damage to the internal circuitry. Instead Tulley BMW of Nashua recommends following the steps in this article to change the CR2450 battery for most BMW key fobs. This simple task will take only a few minutes to get you back on the road.

How to Replace a CR2032 Side Indent Battery

The CR2032 side indent battery that is included in the BMW series 1 key fob (and other models) is simple to replace. This battery is shaped like a nickel and can be removed and put back into the slot very easily. Simply use your fingers to remove the battery that was in use, and then replace it with a new one, making sure to be in line with the opposite polarity. You can also find replacement batteries in numerous auto parts stores and on the internet.

The procedure is slightly different in the event that your BMW includes an "diamond key fob". The CR2016 battery in this key isn't identical to a CR2032 or a CR2025 however, and you are unable to open the case to replace it. You can test if it works by shimming the CR2016 using aluminum foil that is conductive. If it fails, you'll need to cut off the plastic fob to expose the battery. Then, solder into a replacement.

The tiny access port on the majority of BMW key fobs can be opened using the edge of another key's metal blade or a screwdriver that is flat. If you don't own a metal blade you can use the tip of pen. After you've removed your cover, you'll be able to see the CR2032 battery that's inside.

The CR2032 side-indent battery was not designed to be serviced and the case is not opened. This battery is rechargeable and will charge when the key is inserted in the ignition.

It's a good idea to keep a spare key in case your remote gets damaged or lost. If you require assistance programming your BMW remote or replacing a dead battery, contact us at Tulley BMW of Nashua. We have a team of experts who are available to address your questions or concerns. We are looking forward to hearing from you!