Is BMW Battery Replacement Key As Important As Everyone Says?

· 6 min read
Is BMW Battery Replacement Key As Important As Everyone Says?

BMW Battery Replacement - How to Do it Yourself

If your BMW keyfob isn't responding to the lock or unlock buttons, or has stopped working completely and you're in need of an entirely new battery. It's easy to replace the battery on your own.

It is enough to find the access port hidden inside the valet key, remove it, and then replace the battery and replace it with a new one. Then you have to make sure that the new battery is registered.

How to Replace the Battery

A car battery is the most vital element of a car and will need to be replaced at least a few times during the life of a driver. However replacing the BMW battery doesn't have to be the most complicated DIY project, and you may even save some cash by doing the task yourself. Knowing the amount of work necessary to replace a battery is the key to success with your DIY project.

It is essential to know the type of battery that your BMW uses. There are three kinds of batteries, each of which has its own pros and cons being used. One of the most well-known is a lead-acid battery, which is composed of sulfuric acid and lead. It produces electricity through an chemical reaction and it recharges itself when you drive your BMW. Other battery types found in BMWs include Gel or Absorbent Glass Mat. These batteries perform the same way however they require a different installation and handling.

It's time to replace your old battery when you know which one your BMW makes use of. The majority of auto parts stores have a system that matches the BMW model and include the right battery. This can help you save time. You can also look up your owner's manual that will list the type of battery required for your particular model.

To change the battery on a BMW keyfob, switch your vehicle off and remove the metal blade from the valet key. You can also make use of 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 reinstall them using careful. Be sure not to put too much tension on the brackets, as this could crack the battery case. Connect the positive terminal first, before the negative terminal. Finally, reconnect the upholstery to its original location.

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 new battery is installed and won't get confused about which one to charge. This will also reset the battery's age statistics to prevent overcharging your new BMW battery.

How do you replace a CR2032 battery

A dead key fob is difficult, but fortunately, it's also quite simple to replace the battery. It takes only minutes and can be done right at home.

bmw key  found in BMW automobiles use CR2032 batteries, which are a common watch battery. They're slightly more expensive than other kinds of batteries, however you can easily find them at any convenience retailer or parts store. Once you have an entirely new battery, you'll need to take the old one off and put in the new one, and then put the fob cover back on. This is a straightforward process that will allow you to restart your car in a matter of minutes.


A dead battery is likely to be the cause of your BMW key fob not functioning while you're driving around Johns Creek. It's a good thing that it's simple to fix!

First, you'll need press the small tab on the back of your BMW key fob to release the valet key inside. You'll notice a small port close to the battery after the key fob has been opened. You can make use of a flat screwdriver or similar tool to open the cover of the battery, and then replace it with a brand new one.

If you're looking for an all-new BMW or a used vehicle near Decatur Be sure to check our inventory at Tulley BMW Nashua. Contact us today if have any questions about our vehicles. We look forward to helping find the perfect vehicle for you!

How to Replace a CR2450 battery

The BMW key fob provides security and convenience with the touch of the button. However in time the battery in your BMW key fob will weaken and require replacement in order to function properly. Knowing how to replace the BMW key fob battery will allow you to get back on the road quickly and easily.

While there are several different types of BMW key fobs however, they all use the same battery type such as CR2450 or the CR2032 coin cell battery. The small round battery is sold in most stores for less than $1 per unit. CR2450 batteries can be 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 within the fob. Once the metal valet key is removed, search for an access port that is small on the front of the fob which covers the key battery cover. Utilizing a flat screwdriver remove the cover to reveal the battery. After the old battery has been removed, replace it with a new one with the positive side facing upwards and then put it back together.

After the new battery is installed, test the key fob to make sure that it continues to operate in a proper manner. If the key fob still fails to respond, consult your BMW dealership for further troubleshooting assistance. Certain older BMW models require that the key fob be synchronized with the vehicle after replacing the battery. However, this is not the case for BMWs manufactured in recent years.

It is possible to replace the battery in an old BMW key fob, by opening the case and soldering the new battery in. However, this procedure is not recommended because it could damage the internal circuitry. Instead, Tulley BMW of Nashua recommends following the steps in this guide to replace the CR2450 battery on the majority of BMW key fobs. This easy task can be done in a matter of minutes and will help you get back on the road sooner.

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. This battery appears like a penny and is easy to insert into the slot. Replace the battery you have used before with the new one by using your fingers. Make sure to ensure that the polarity is in line. There are replacement batteries in many auto parts stores as well as on the internet.

The process is slightly different depending on whether your BMW has the "diamond key fob". It is not possible to replace the CR2016 battery because it is different from a CR2032, CR2025 or a CR2032. However you can try shimming a CR2016 cell using conductor foil to see whether it works. If it fails, you'll need to cut off the plastic fob and expose the battery. Then, solder in a replacement.

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 flat-headed screwdriver. If you don't own a metal blade or a flat screwdriver, you can use the tip of a pencil. Once you remove the cover, the CR2032 batteries will be evident.

It's important to note that the CR2032 side indent battery wasn't designed to be serviced, and you can't open the case. The battery can be recharged, and is charged when you insert the ignition key.

It's a good idea have a spare key in case your fob is damaged or lost. If you need help programming your BMW remote or replacing the battery that is dead, contact us at Tulley BMW of Nashua. We have a dedicated team of experts available to answer any questions or concerns. We look forward having a conversation with you!