Five BMW Battery Replacement Key Projects For Any Budget 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 altogether It's likely that it needs a new battery. It's not difficult to replace the battery at home.

The battery can be replaced by simply removing the access port from the valet key. Then, you must register the replacement battery.

How to Replace the Battery

A car battery is one of the most important parts of any vehicle and will need to be changed at least once in the life of a driver. It's not difficult to replace the BMW battery yourself and you can even save money. The most important thing to do a successful 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 utilizes. There are three kinds of batteries, each with its own pros and con. Lead-acid batteries are the most common because they contain sulfuric acids and lead. It produces electricity through an chemical reaction, and recharges itself when you use your BMW. Other battery types found in BMWs include Gel or Absorbent Glass Mat. These batteries operate similarly but require different installation and handling.

Once you've got a clear idea of the battery your BMW is using then 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 correct battery, which can save you some time. You can also check the owner's manual that will list the battery type needed for your model.

To replace the battery on the BMW key fob, turn off your vehicle and take out the blade made of metal from 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 then carefully reinstall. Be careful not to put too much tension on the brackets, as this could crack the battery case. Connect the positive first before connecting the negative. Finally, connect the upholstery back to its original place.

Registering your new battery is also an excellent idea to do. If you do this, the engine control module (known as the DME) will know that the new battery is installed and won't get confused about which one to charge. It also resets the statistics on battery age, which could help prevent overcharging of your new BMW battery in Smyrna or Alpharetta.

How to Replace a CR2032 battery

It's a hassle to have a dead key fob, but changing the battery is simple. It takes only just a few minutes and can be done at home.


BMW key fobs use CR2032 watches batteries. These batteries are a bit more expensive than other ones however they are available at any convenience store or auto parts store. If you've got the new battery, simply take the old one off and put in the new one, and put the cover back on. It's a quick process, and you'll be able start your vehicle again in minutes.

If you've been driving your BMW around the Johns Creek area, and you realize that your key fob won't work It's most likely due to an unresponsive battery. It's not difficult to fix!

Press the small tab located on the side of the BMW key fob to release the valet key. You'll see a small port close to the battery once the key fob has been opened. The cover for the battery can be removed with a flat-headed screwdriver, or a similar tools.

If you're in the search for a brand new BMW, or you want to purchase a used vehicle to sell near Decatur Make sure to check out our inventory at Tulley BMW of Nashua! If you have any questions about our vehicles, contact us now. We look forward to helping find the perfect vehicle for you!

How to Replace a CR2450 battery

The BMW key fob is a convenient device that provides security and convenience with the push of one button. However, over time the battery inside your BMW key fob may be damaged, and require replacement in order for it to continue working effectively. Knowing how to replace the BMW key fob can aid you in getting back on the road again swiftly and quickly.

There are many different types of BMW key fobs however, they all utilize the same type of battery that is a CR2450 or CR2032 coin cell. This small, round battery is sold in most stores for less than $1 per unit. CR2450 batteries are easily installed and removed from the key fob.

To replace the CR2450 battery in your BMW first look for the tab on the key fob which opens the metal valet key inside the fob. Once the metal valet key is removed, look for an access port small on the front of the fob which covers the key battery cover. Using a flat screwdriver, remove the cover and expose the battery. Once the old battery is removed, replace it with a new one with the positive side facing upwards and then put it back together.

Test the key fob after the battery has been replaced to ensure it's working as intended. If the key fob fails to respond, consult your BMW dealership for further troubleshooting assistance. The older BMW models may require the key fob and the vehicle to be re-synchronized after changing the battery, but this isn't the norm for BMWs produced in recent years.

It is possible to replace the battery on an old BMW key fob, by opening the case and soldering an alternative one into. However, this method should not be attempted since it could damage the internal circuitry. Tulley BMW Nashua suggests that you follow the instructions in this guide to changing the CR2450 batteries that are found on the majority of BMW keyfobs. This simple task can take just a few moments and return you to the road.

How do I replace a CR2032 Side Indent Battery

The CR2032 side indent battery on the BMW series 1 key fob (and some other models) is easy to change. It is shaped like a nickel, and it is able to pop in and out of the slot with ease. Replace the battery you have used before with the new one by using your fingers. Make sure you match up the polarity. You can find replacement batteries in many auto parts stores and online.

bmw replacement keys is slightly different if your BMW is equipped with the "diamond key fob". The CR2016 battery inside this key isn't the same as either a CR2032 or a CR2025, and you can't open the case to replace it. You can test whether it works by rotating the CR2016 with some aluminum foil that conducts electricity. If it fails, you'll need to cut off the plastic fob and expose the battery. Then, solder in a replacement.

Most BMW key fobs come with an access port that can be opened with the edge of a blade made of metal from a different key or a flat screwdriver. If you don't have a steel blade, you can try using the pencil's tip. When you take off the cover, the CR2032 batteries are visible.

The CR2032 side-indent battery was not designed to be serviced and the case cannot be opened. The battery is rechargeable and charges when you insert the ignition key.

It's essential to have an extra key in case you break your fob or lose it in a different location. If you need help programming your BMW remote or replacing a dead battery, contact us at Tulley BMW of Nashua. We have a dedicated team of experts who are ready to address any questions or concerns. We look forward having a conversation with you!