Changing the Battery in Your BMW Car Key Fob
Many BMWs require a key fob with a sleek, slant-shaped battery. This kind of battery can be found at many hardware stores and even big-box retailers.
lost bmw keys can be changed in the comfort of your own home. Tulley BMW Nashua can guide you through the process to ensure you can be back on Johns Creek roads quickly.

How to replace a battery
Many BMW drivers aren't aware that they might require a battery change in their key fob at some point in their ownership. This is among the most simple DIY tasks for car maintenance that you can do yourself. The replacement of the battery should take just a few minutes and is also very affordable. The battery can be found at local convenience stores and auto parts stores for less that ten dollars.
The BMW key fob is usually powered by a CR2032 or a "watch" battery. Take off the cover on the key fob and then gently place the new battery. Pay attention to the orientation. The new battery must be placed in a way that the plus and negative symbols are facing the same direction as the previous battery. Once the battery is installed it is possible to replace the key fob, and then drive your BMW again.
Certain older BMW models have an alternative type of key, which features a physical metal key that is inserted into the ignition. The batteries in these keys also degrade over time, and you will need to replace them in order to get your vehicle started. The type of battery you have can be recharged, and replacing it requires cutting a small part of the key fob so be careful when doing this.
The process for changing the battery in this type of BMW key is a bit different, but it's still simple. You'll first need to take off the metal fob key and then open the port on the side of the key. Once you have opened the access port, you'll need to make use of a flat screwdriver to split the two halves of the key fob. Once the key fob is split in two parts, you can easily remove and replace the dead battery. The two halves will snap back together after you've replaced your battery. If you need help, or if you have any other questions regarding how to replace the battery on your BMW key fob, contact us now! Our team is always there to assist you. We look forward to helping you with all your automotive requirements!
Battery CR2450
It's not obvious however, your BMW key fob requires a specific battery in order to function properly. The CR2450 battery is a 3-volt coin cell battery made of lithium that provides power to the numerous functions of your key fob, such as remote locking and unlocking, Comfort Access functionality, and even remotely starting your automobile! These functions require additional power that comes from the CR2450 battery that is slightly larger in diameter than its CR2032 counterpart.
You can find these batteries in all places that sell regular 3-volt lithium batteries like gas stations and supermarkets. They typically cost around $7 to $9 for a set of four batteries, but careful price comparison shopping could provide cheaper alternatives from lesser-known brands.
It's easy to replace the battery in your BMW keyfob. You don't need to re-program or re-synchronize your vehicle. Simply remove the valet key from the fob, then press a small tab in the opening, and then pull out the existing battery. Place the new battery in exactly the same way, making sure that the positive side faces up. Reassemble the fob.
After you've replaced the battery in your BMW key fob, it's crucial to test it to make sure it locks and unlocks the car correctly and is compatible with all its other functions that are expected. For instance, you can test pressing the buttons on the fob to see if they are turned on, locked or open the trunk. Once you're certain that everything works as expected you can put the fob on and go!
The key fob also contains an embedded chip that contains the security codes and programs necessary to communicate with your BMW. This information is powered by the key fob's battery, but the chip is designed to retain the information even if the battery is removed. This is one of the reasons why it's crucial to replace the battery promptly when it starts to wear out.
The majority of BMW models utilize the sleek CR2032 battery in their key fobs. It's a standard battery type that can be found in most electronics and is easy to replace if you're required to. For models that utilize the Comfort Access and remote start features however, a larger battery CR2450 is required. This is a larger battery, specially made for high-drain use. It is available at a variety stores. They can last up to 10 Years when maintained properly. They have a nominal power of 600-620mAh. These batteries are perfect for high-drain applications that require the highest the performance and endurance. For the best results, stick with a reputable brand for your replacement battery. This will ensure that the new battery is of high-quality, and will withstand the demands of daily use.
CR2032 Battery
The battery CR2032 is a standard coin cell found in a variety of electronic devices, including remote controls and key fobs. It is also used in fitness and medical trackers. This type of battery is also found in heart rate monitors made by companies like Polar, Garmin, and Wahoo Fitness. It is also used in bike parts such as road shifters made by SRAM and FSA as well as in a few headlights.
A CR2032 makes use of lithium chemistry and has a round shape with a diameter and height of between 20 and 32 millimeters. It has a low self-discharge so it can be left in storage for a long time without losing any charge. This battery is a favorite for electronics due to its low self-discharge rate and ability to hold a charge even in extreme temperatures.
Battery life is contingent on a variety of elements, including the material storage conditions, the time spent storing, physical damage, humidity and temperature. The ideal storage space is a climate-controlled, dry space without any physical damage. It is essential to purchase only high quality batteries from reputable retailers as low-quality batteries could have lower mAh capacities and may be prematurely depleted.
The majority of major battery manufacturers offer lithium coin cells. They are also sold in many large retail stores. Some of the most popular brands are Energizer Panasonic and Duracell. These brands are known for adhering to the highest standards of safety and reliability. If you have any questions about the authenticity of a specific battery or its packaging, it is best to contact the manufacturer directly for more information.
When using a CR2032 It is crucial to be aware that the battery has a positive and a negative terminal. The positive terminal is indicated by a dot at the top of the battery while the negative is marked by an arc across the base. If you place the battery into a device wrong way up the device could get damaged or even an ignition risk.
As opposed to other kinds of batteries, there's no socket or plug to connect it. Instead the CR2032 battery is connected to the device via the metal tab. This tab must be pressed down to connect the battery and can only be done by hand. The installation of a CR2032 into a device like a smoke detector or sensor requires the tab contacts on the metal be in the proper position. If they aren't it could not work or you could have inconsistent results. Fortunately, the manuals for most smoke detectors and sensors provide diagrams showing which way to insert the battery. If you're unable to locate a wiring diagram for your specific device it's recommended to watch a video that shows the proper way to install the battery.