7 Things You've Always Don't Know About BMW Battery Replacement Key BMW Battery Replacement - How to Do it Yourself

If your BMW keyfob does not respond to the lock or unlock buttons, or has stopped working entirely, then you may need an entirely new battery. It's simple to replace the battery on your own.

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

How to replace the battery

A car battery is the most vital part of any vehicle and will have to be replaced at least once in a driver's life. It's not hard to replace a BMW battery yourself and you can even save money. The key to an effective DIY battery replacement is knowing how much work it will take.

It is essential to be aware of the type of battery that your BMW utilizes. There are three types of batteries each with their own pros and cons. One of the most popular is a lead-acid battery that is made up of lead and sulphuric acid. It generates electricity by 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 operate similarly but require different handling and installation.

It's time to replace your old battery once you know which one your BMW utilizes. The majority of auto parts stores have systems in place to match your BMW's model and model with the appropriate battery, which can help you save time. You can also try looking in your owner's manual which will likely list the type of battery required for your specific model.

To replace the battery on a BMW keyfob, turn the vehicle off and then remove the blade made of metal 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 removing the batteries, clean the terminal connectors then carefully reinstall. Don't tighten brackets too tight, as this could cause cracks in the battery case. Connect the positive first, then 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 know that a new battery has been installed and won't be confused as to which one to charge. This will also reset the battery's age data to ensure that you don't overcharge your new BMW battery.

How to Replace bmw replacement key cost is difficult, but fortunately, it's also quite simple to replace the battery. It only takes a few minutes and can be done at home.

BMW key fobs are powered by CR2032 watches batteries. They're slightly more expensive than other kinds of batteries, however they are easily found at any convenience retailer or parts store. You can change the battery by removing the old one and replacing it with the new one. Then you can put the fob back in. It's an easy process and you'll be able to start your vehicle again in the blink of an eye.


A dead battery is likely to be the cause of your BMW key fob not working 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 side of your BMW key fob to open the valet key that is inside. Once the key fob is open, you'll see an access port in the middle where the battery is. You can make use of a flat screwdriver or similar tool to take off the cover of the battery, and then you can replace it with a fresh one.

If you're looking to buy a new BMW or a pre-owned vehicle near Decatur Be sure to browse our inventory at Tulley BMW Nashua. Contact us today if you have any questions regarding our vehicles. We look forward to helping to find the perfect car for you!

How do I replace the CR2450 Battery

The BMW key fob offers security and convenience with the touch of a button. However, over time the battery in your BMW key fob may weaken, and it will need to be replaced in order for it to function properly. Knowing how to replace the BMW key fob can help you get on the road again swiftly and quickly.

While there are several different types of BMW key fobs, the majority of them use the same battery type such as CR2450 or the CR2032 coin cell battery. This small, round battery can be commonly found in most stores and can be purchased for less than a dollar for each unit. In addition to being readily available, CR2450 batteries are also extremely easy to install and remove from the key fob.

To replace the CR2450 batteries in your BMW look for the tab that releases the metal valet inside the fob. Once the metal valet key is removed, search for an access port that is small on the front of the fob that hides the key battery cover. With a flat screwdriver, remove the cover to expose the battery. After the old battery has been removed, replace it with a brand 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 is still working properly. If the key fob still does not respond, contact your BMW dealer for further assistance. Older BMW models may require the key fob and the vehicle to be re-synchronized following a change in the battery, but this is not typical for BMWs made in recent years.

Although it is possible to replace the battery on an older BMW key fob by cutting the case and then soldering in a new battery, this is not recommended because it could cause damage to 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 simple task can take only a few minutes and return you to the road.

How to Replace a CR2032 Side Indent Battery

The CR2032 side indent battery in the BMW series 1 key fob (and other models) is simple to replace. It looks like a penny, and can be easily inserted into the slot. Use your fingers to remove the battery that was in use, and then replace it with a brand new one, making sure to be in line with the opposite polarity. There are replacement batteries in many auto parts stores, as well as on the internet.

If your BMW has diamond key fobs it is a bit more complex. The CR2016 battery inside the key is not 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 aluminum foil that is conductive. If it isn't working, you'll have to cut off the plastic fob and expose the battery. Then, you can solder to a new battery.

The tiny access port found on many BMW key fobs can be opened with the edge of another key's metal blade or flat-headed screwdriver. If you don't have an edged metal blade, you can use the tip of pen. Once you remove the cover and then open the cover, the CR2032 batteries are visible.

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

It's a good idea to keep a spare key in the event that your remote is damaged or lost. If you need assistance programming your BMW remote or replacing a dead battery, contact us at Tulley BMW of Nashua. We have a group of dedicated experts who can help you with any questions or concerns. We are looking forward to hearing from you!