BMW Battery Replacement - How to Do it Yourself

If your BMW key fob isn't responding to your lock and unlock buttons, or has stopped working altogether, it probably needs an upgrade to the battery. It's simple to replace the battery on your own.

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

How do I replace the battery?

A car battery is the most crucial element of a car, and it will need to be replaced at least once during the course of a driver's career. It's not difficult to replace the BMW battery yourself, and you may even save money. The key to success with a DIY battery replacement is knowing the amount of work is required for the task.

It is essential to be aware of the type of battery that 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 since they are made up of sulfuric and lead. It produces electricity through an chemical reaction and it recharges itself when you drive your BMW. Other types of batteries used in BMWs are Gel or Absorbent Glass Mat (AGM). 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 that match the BMW model and use the right battery. This will help you save time. You may also want to look at the owner's manual, which will likely include the battery type required for your particular model.

To replace the battery in the BMW key fob, shut off your vehicle and BMW Series 1 Key take out the metal blade of the valet key or flat screwdriver that can access the lock cylinder. Remove the liner from the fob and locate the battery. After removing the batteries, clean the terminal connectors then carefully reinstall. Make sure to not put too much tension on the brackets, as this could crack the battery case. Connect the positive terminal prior to the negative terminal. Finally, connect the upholstery in its original position.

Registering the battery you have purchased is an excellent thing to do. If you do this the engine control module (known as the DME) will be aware that the battery is installed and won't be confused about which one to charge. This will also reset the battery's statistics regarding age to prevent overcharging your new BMW battery.

How to Replace the CR2032 Battery

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

The key fobs in BMW automobiles use CR2032 batteries that are a standard watch battery. They're more expensive than other kinds of batteries, however they are easily found at any convenience retailer or parts store. When you've purchased an entirely new battery, you can simply remove the old one, fit in the new one, and put the cover back on. It's an easy process and you'll be able to start your car in no time.

If you've been driving your bmw car key replacement around the Johns Creek area, and you realize that your key fob isn't working, it's likely because of an unresponsive battery. Fortunately, it's easy to fix!

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

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How do you replace the CR2450 Battery

The BMW key fob provides security and convenience with the push of the button. Over time, however the battery in your BMW key fob may become weaker, and will require replacement in order for it to continue working effectively. Knowing how to replace the BMW key fob will aid you in getting back on the road again swiftly and easily.

While there are several different kinds of BMW key fobs most utilize the same type of battery, a CR2450 or CR2032 coin cell. This small, round battery can be often found in stores and can be purchased for less than a dollar per unit. CR2450 batteries can be easily installed and removed from the key fob.

To replace the CR2450 batteries in your BMW, locate the tab that opens the valet made of metal 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. Utilizing a flat screwdriver take off the cover to reveal the battery. Insert a new battery with the positive side facing up and then reassemble your key fob.

Test the key fob after the battery is replaced to confirm that it's working as intended. Contact your BMW dealer if your key fob is still not responding. Older BMW models might require the key fob and vehicle to be re-synced after changing the battery, but this is not typical for BMWs produced in recent years.

It is possible to replace the battery inside an old BMW key fob by opening the case and putting the new battery in. However, this procedure should not be used as it may damage the internal circuitry. Tulley BMW Nashua suggests that you follow the instructions in this guide for changing the CR2450 batteries in the majority of BMW keyfobs. This simple task will take only a few minutes and get you back on the road.

How to replace the CR2032 Side Indent Battery

The CR2032 side indent battery that is included in the BMW series 1 key fob (and some other models) is easy to replace. This battery looks like a penny, and is easy to insert into the slot. Replace the old battery with the new one using your fingers. Be sure to match up the polarity. You can also find replacement batteries in numerous auto parts stores and on the internet.

If your BMW has a diamond key fob it is a bit more complex. The CR2016 battery in this key isn't identical to a CR2032 or a CR2025, and you can't open the case to replace it. However you can try shimming a CR2016 cell with electrically conductive foil to determine if it will work. If it doesn't work, you'll need to cut off the plastic fob and expose the battery. Then, you can solder into a replacement.

Most BMW key fobs have 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 metal blade you can try using the tip of a pencil. After you've removed your cover, you will be able to see the CR2032 battery that's inside.

It's important to know 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 the key is inserted into the ignition.

It's essential to have an extra key in case you break your key or lose it somewhere. 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 available to answer any questions or concerns. We are eager to hear from you!