- the key fob battery
The most common reason a key fob stops working is a dead or weak battery. Key fobs use small coin-cell batteries, typically CR2032 or CR2025 types, which gradually lose charge over time. When the battery voltage drops below a certain threshold, the fob’s transmitter cannot send a strong enough signal to communicate with your vehicle.
To check and replace the battery, locate the small seam or screw on the fob casing and carefully open it with a flat tool. Remove the old battery and note its
