How to Replace the Key Battery for Peugeot 408?
4 Answers
The steps to replace the key battery for Peugeot 408 are: 1. Remove the mechanical key and insert it into the hole; 2. Pry open the key, remove the old battery by opening the key cover, and install the new battery; 4. Close the car key cover and finally reinstall the mechanical key. The dimensions of the Peugeot 408 are: length 4750mm, width 1820mm, height 1488mm, with a wheelbase of 2730mm. The Peugeot 408 is equipped with a 1.2T turbocharged engine, delivering a maximum power of 100kW and a maximum torque of 230Nm, paired with a 6-speed dual-clutch transmission.
As an average driver, I change the battery in my Peugeot 408 key fob myself when it runs out of power. First, take out the key fob—there's a small notch on it. Use your fingernail or a small tool to gently pry open the casing, splitting it into two halves. Be careful not to use too much force to avoid damage. Inside, you'll find a coin-shaped CR2032 battery—make sure you get the right model. Before removing the old battery, note its orientation (usually positive side up). When inserting the new battery, align it properly and press lightly to secure it in place. Then, snap the casing halves back together, ensuring the clips lock firmly—give it a shake to check it doesn't feel loose. Keep spare batteries at home; the battery typically weakens after about a year. If the lock won't open or the buttons stop responding, it's time for a replacement. This method is quick and easy, saving you the hassle of queuing at a repair shop and spending extra money.
I enjoy tinkering with electronic gadgets myself, and replacing the battery in the Peugeot 408 key is a breeze. When you get the key, first look for a seam on the back cover. Use a small screwdriver or steel ruler to gently pry it open—never force it. Inside, the compact space houses a CR2032 battery. When removing the old battery, take a photo to note the orientation of the positive and negative terminals to avoid reverse installation, which could damage the circuit. Opt for branded batteries like Panasonic or Desay for the replacement. Press the new battery firmly until you hear a slight click, indicating a secure fit. During reassembly, align the edges and press tightly. It’s advisable to check the battery condition every six months. If the key’s responsiveness declines, replace the battery promptly to prevent unexpected failures. Also, avoid exposing the key fob to water or extreme heat to extend its overall lifespan.
I've repaired many car keys, and replacing the battery for the Peugeot 408 is quite simple. Take the key and gently pry open the casing along the groove, then remove the old CR2032 battery and replace it with a new one. Make sure the negative terminal faces downward and is properly aligned—don't reverse the polarity. After securing the terminal, test the buttons. If the casing is hard to open, avoid forcing it with a knife to prevent damage. The battery typically lasts about two years, so it's good to keep spares for emergencies. This quick maintenance ensures safety and takes just a few minutes.
