How to Replace the Battery in a Peugeot 408 Car Key?
2 Answers
Peugeot 408 remote key battery replacement: Remove the mechanical key and locate the hole for removing the mechanical cover. Insert the mechanical key into the hole and gently pry open the key to remove the cover. Take out the old battery, install the new battery, replace the car key cover, and finally reinsert the mechanical key. When installing the new battery, pay attention to the positive and negative terminal positions. After replacing the cover, reinitialize the remote. Below are some precautions regarding key usage: 1. During daily use, do not place the key near high-power appliances such as TVs, microwaves, washing machines, or computers, as these devices can reduce the battery life of the remote. 2. Do not expose the key to extremely cold environments below 0°C or extremely hot environments above 50°C, as this will significantly shorten the battery life. Avoid repeatedly operating the remote outside its working range, as this may cause the remote to malfunction. If the remote stops working, it will need to be reinitialized. Additionally, when the key is inserted into the ignition switch, the remote will not function even if the ignition is turned off.
As a long-time Peugeot 408 owner, let me tell you that replacing the key battery is actually quite simple – no need to visit the dealership. First, locate the small notch or seam on the back cover of the key. I used a small flathead screwdriver from home to gently pry it open – just be careful not to apply too much force to avoid damaging the plastic parts. Inside you'll find a coin cell battery, usually CR2025 model, which costs just a few bucks at supermarkets or online. When removing the old battery, remember its orientation (positive/negative sides) – installing it backwards will cause malfunction. After inserting the new battery, snap the cover back on and test the lock/unlock functions. Avoiding drops and impacts can extend battery life – typically needs replacement every two years. DIY saves time and money, so keep some tools and spare batteries at home.
