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7 Helpful Tricks To Making The Most Out Of Your BMW Battery Replacement Key
BMW Battery Replacement - How to Do it Yourself

If your BMW key fob isn't responding to the lock and unlock buttons or has stopped working completely it may need a new battery. It's easy to replace the battery yourself.

You simply need to locate the access port hidden inside the valet key, remove it, and replace the battery to a new one. You will then need to add the new battery to your account.

How to Replace a Battery

A car battery is the most crucial part of any vehicle and will need to be replaced at least once during the course of a driver's career. However, replacing a BMW battery does not have to be the most complicated DIY project, and you may even save some money by doing it yourself. Knowing how much work is required to replace batteries is the first step to success with your DIY project.

The first step is to identify the type of battery your BMW makes use of. There are three kinds of batteries each with its own pros and con. Lead-acid batteries are the most common because they contain sulfuric and lead. It produces electricity by chemical reactions and recharges itself by using the power of your BMW. Other types of batteries that are used in BMWs are Gel or Absorbent Glass Mat (AGM). These batteries perform the same way but require a different installation and handling.

Once you've got a good idea of which battery your BMW has and you know the battery's name, it's time to replace the old one. The majority of auto parts stores have systems that match the BMW model and make with the right battery. This will save you time. You can also refer to the owner's manual, which should list the type of battery needed for your particular model.

To replace the battery on a BMW keyfob, turn the 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. Remove the liner from the fob and locate the battery. After you have removed the battery, clean the terminal connections, and then put them back in place with careful. Make sure to not tighten the brackets too tightly because this could damage the battery case. Connect the positive terminal prior to the negative. Last, reconnect the upholstery in its original position.

It's recommended to register your new battery. If you do this the engine control module (known as the DME) will be aware that the battery has been installed and won't be confused as to which one to charge. This will also reset the battery's statistics regarding age to avoid charging too much for the new BMW battery.

How to Replace a CR2032 battery

A lost key fob can be frustrating, but luckily, it's also pretty easy to replace the battery. It only takes minutes and can be done at home.

BMW key fobs use CR2032 watches batteries. They're slightly more expensive than other types of batteries, but they are easily found at any convenience store or parts center. Once you have the new battery, simply take the old one off, fit in the new one, and put the cover back on. This is a simple procedure that will allow you to get your car running within a matter of minutes.


If you've been driving your BMW around the Johns Creek area, and you notice that your key fob isn't functioning, it's likely because of a dead battery. It's simple to fix.

Press the small tab located on the back of the BMW key fob in order to open the valet key. Once the key fob is open, you'll see a small access port in which the battery is. You can use a flat screwdriver or similar tool to open the battery cover, then you can replace it with a fresh one.

So if you're in the need of a new BMW or to purchase a used vehicle available near Decatur, be sure to check out our inventory at Tulley BMW of Nashua! If you have any concerns about our vehicles, contact us today. We look forward to helping find the perfect vehicle for you!

How do you replace a CR2450 battery

The BMW key fob provides security and convenience with the push of a button. However, over time the battery inside your BMW key fob can be damaged and require replacement in order to function properly. Knowing how to replace a BMW key fob battery will allow you to get back on the road swiftly and easily.

There are a variety of BMW keyfobs. However they all have the same kind of battery that is a CR2450 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 for each unit. In addition to being easily accessible, CR2450 batteries are also very simple to install and take off from the key fob.

To replace the CR2450 battery in your BMW first find the tab on the key fob that opens the metal valet key within the fob. When the metal valet keys is removed, search for an access port small on the front of the fob which conceals the key battery cover. Remove the cover with a flat-headed screwdriver, revealing the battery. Insert a new battery with the positive side up and then reassemble your key fob.

After the new battery is installed Test the key fob to make sure that it functions in a proper manner. If the key fob still isn't responding, contact your BMW dealer for further troubleshooting assistance. Some older BMW models require that the key fob is synchronized with the vehicle after changing the battery. However, this is not the case for BMWs made in recent years.

Although it is possible to replace the battery on an older BMW key fob by removing the case and putting to a new battery, this is not recommended as it could damage the internal circuit board. Tulley BMW Nashua recommends that you follow the instructions in this guide for changing the CR2450 batteries in the majority of BMW keyfobs. This easy task can be done in a matter of minutes and will help you get back on the road faster.

How do you replace a CR2032 Side Indent Battery

The CR2032 side indent battery in the BMW series 1 key fob (and other models) is easy to replace. It appears like a penny and can be easily inserted into the slot. Simply use your fingers to take out the old battery, and then replace it with a new one, making sure to be in line with the opposite polarity. You can find replacement batteries in a variety of auto parts stores, as well as online.

If your BMW has diamond key fobs, the process is slightly more difficult. It is not possible to replace the CR2016 battery as it is different from a CR2032, CR2025 or a CR2032. However, you can try shimming a CR2016 cell using conductor foil to see if it will work. If genuine bmw replacement key cost fails, you'll need to cut off the plastic fob and expose the battery. Then, solder to a new battery.

The small access port on the majority of BMW key fobs can be opened with the edge of a different key's metal blade or a screwdriver with a flat head. If you don't have a metal blade you can make use of the tip of pen. After you have removed the cover and then open the cover, the CR2032 batteries will be visible.

It is important to remember that the CR2032 side indent battery was not intended to be serviced, and you can't open the case. The battery is rechargeable and charges when you insert the ignition key.

It's important to have an extra key in case you break your key or lose it somewhere. 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 who are available to answer any questions or concerns. We are looking forward to hearing from you!

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