What is the battery model for the new BMW 5 Series key?
2 Answers
The battery model for the new BMW 5 Series key is CR2032. CR2032 is a lithium manganese dioxide battery, named according to the IEC standard. The breakdown is as follows: C - Indicates a chemical battery system with lithium metal as the negative electrode and manganese dioxide as the positive electrode. R - Indicates the battery shape is cylindrical; if it were square, it would be denoted by F. 20 - Indicates the battery diameter is 20mm. 32 - Represents the battery height of 3.2mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity varies between 200-240mAh depending on the manufacturer's quality. The shelf life of CR2032 is typically 5 years. If the manufacturing level is low or quality control is poor, the lifespan can be significantly reduced. Domestic top-tier brands can generally guarantee this lifespan. Under ideal conditions (sealed, room temperature, no moisture, etc.), the lifespan can extend to 8 years or even 10 years. BMW models such as the 3 Series, 5 Series, and 7 Series all use the CR2032 battery for their keys. Replacing the key battery involves just three steps: Step 1: Remove the mechanical key. Press the lock button on the side of the smart key to remove the mechanical key. Step 2: Open the battery cover. After removing the mechanical key, you will see a deep slot and a shallow slot at the top of the smart key. The deep slot is for the keyhole, while the shallow slot is used to open the battery cover. Insert the mechanical key into the shallow slot and pry it open to reveal the coin battery. Gently remove the battery. Step 3: Replace the battery. Insert the new battery, reattach the battery cover, and then the mechanical key. The key battery replacement is now complete. Two important notes when replacing the BMW 5 Series key battery: The key uses a CR2032 coin battery—make sure not to purchase the wrong model. Replace the battery quickly, as the key has a memory function. If power is lost for more than 5 minutes, the key will need to be reprogrammed.
As an enthusiast who frequently researches automotive technology, I discovered that the BMW new 5 Series key fob uses a CR2032 coin cell battery, which is extremely common in the automotive field. This 3-volt lithium battery, despite its compact size, delivers stable power to support the key's remote unlocking, engine start, and anti-theft functions. I enjoy DIY maintenance of these small accessories and recall that both the manual and online forums recommend this battery type. These batteries are readily available on e-commerce platforms like JD.com or Taobao, costing just a few yuan each, with brands like Sony or Duracell offering higher reliability. Don't overlook regular checks—I recommend replacing the battery every 1-2 years to prevent key failure that could leave you locked out or unable to start your car. Replacement is straightforward: simply pry open the back cover and gently insert the new battery, ensuring the positive side faces the correct direction.
