How Often Should You Replace Car Key Batteries?
2 Answers
Car remote key batteries typically last 2-3 years, except for touchscreen LCD remote keys (such as those for BMW 5 Series). The battery lifespan may vary depending on the vehicle model. Here are ways to determine if your car remote battery is running low: Shortened remote range: For example, if the door could previously be unlocked from 5-6 meters away but now only responds when very close to the vehicle; Unresponsive remote buttons: Occasional failure when unlocking the car, requiring multiple presses to function; Some vehicle models feature a remote key battery alert: The dashboard will display a "low remote battery" warning when the system detects the key is running out of power.
I've been driving for over a decade and have replaced my key fob batteries four or five times, typically every two to three years. Regular remote keys most commonly use CR2032 coin batteries, which cost just over ten yuan at supermarkets. If you notice the remote's range decreasing or occasional malfunctions, it's a sign the battery is running low. Smart keys drain batteries faster, especially those with keyless entry – my neighbor's BMW needed a replacement after just a year and a half. Changing it yourself is simple; just search online for the battery model and pry open the key cover. Keeping a spare battery in the glove box is the safest bet. Last time my key died at a highway rest stop, I had to pay an extra fifty yuan to get it replaced at a small shop.
