How to replace the battery of a Bestune B30 car key?
2 Answers
The method to replace the battery of a Bestune B30 car key is as follows: 1. There is a round button on the side of the car key. Press this button with one hand and pull out the mechanical key with the other hand; 2. Locate the gap in the middle of the top part of the key and insert a flat-head screwdriver; 3. Pry the key up and down until a gap is created; 4. Take out the key circuit board, gently push one side of the battery with your finger, and remove the battery; 5. Install the new battery with the positive side facing up. Taking the 2019 Bestune B30 as an example, its body structure is a four-door five-seater sedan, with body dimensions of: length 4625mm, width 1790mm, height 1500mm, wheelbase of 2630mm, fuel tank capacity of 50 liters, trunk capacity of 480 liters, and curb weight of 1270kg.
When I drove the Besturn B30 before, I went to the 4S shop after the key ran out of battery, and they taught me how to replace it myself—super easy. First, find a small Phillips screwdriver; there's a tiny screw on the back of the key, just unscrew it. Be careful not to break the plastic clips when removing the back cover. The battery is usually a CR2032 coin cell, installed with the positive side facing up. If you can't locate the screw, take a photo and check the model online to avoid mistakes. After replacement, test the key's remote function to ensure the new battery works properly. Some long-time owners say the battery lasts 2-3 years; frequent replacements might indicate a seal issue. For safety, keep a spare battery in the car to avoid being locked out late at night. DIY saves dozens in labor costs—quite cost-effective. If you're not handy, a repair shop can do it quickly.
