BMW Key Fob Battery Replacement
Find the correct key fob battery size for your BMW. Select your model and year to see the exact replacement battery, or use our step-by-step replacement guide.
How to replace a BMW key fob battery
Most BMW key fobs use a small 3V coin-cell battery (such as CR2032 or CR2025). Open the fob along the seam, swap the battery with the same size, and snap it closed. See our full how-to guide or browse your model below to confirm the exact size.
BMW key fob battery sizes
These battery types are used in BMW key fobs. Not sure which one fits yours? Select your model and year below, or use our battery size guide.
BMW Models
Select your BMW model and year to find the exact battery for your key fob.
M3 Comp. M xDrive
BMW M3 Comp. M xDrive key fob battery by year
Browse years and batteries Quick finderM4 Comp. M xDrive
BMW M4 Comp. M xDrive key fob battery by year
Browse years and batteries Quick finderFind Your Exact Battery
Use our vehicle selector to find the exact battery for your BMW key fob.
