Eventually, the battery in your Lexus key fob will need replacing. While a Lexus Centre can handle this, it’s a straightforward task you can easily do yourself. This guide will walk you through replacing the Lexus Ct200h Key Fob Battery at home.
First, identify your key type: is it a conventional key that turns in the ignition or a smart key for push-button start? The battery replacement process differs slightly depending on the type of key you have for your Lexus CT200h.
Let’s begin with the conventional ignition key for your Lexus CT200h. Refer to your Lexus CT200h owner’s manual to confirm the correct battery type. Gather a small Phillips head screwdriver, a coin (a 20p piece or a similarly sized coin works well), and a paperclip.
On the back of your Lexus CT200h key fob, look for one or two small Phillips head screws.
Alt text: Opening a Lexus conventional key fob with a single screw to access and replace the battery.
If your Lexus CT200h key fob has a single screw, use the Phillips screwdriver to remove it. Store the screw safely, as it’s small and easily misplaced. Gently wiggle and unhook the back cover from the key body and lift it off. You’ll see two more smaller screws securing the internal components. Unscrew these to access the battery. Use a paperclip to carefully pry out the old battery. Install the new battery, ensuring correct polarity. Reassemble the key’s internal components with the two small screws. Then, reattach the back cover, hooking it in place and securing it with the longer screw.
If your Lexus CT200h key fob is secured with two screws, remove both before attempting to open the case.
Alt text: Removing two screws from a Lexus conventional key fob to replace the CR battery inside.
With this type of Lexus CT200h key fob, there’s no hook. The back cover should detach once the screws are removed. Look for the “coin open” marking near a small slot on the key’s interior. Hold the key firmly in one hand, insert a coin into the slot, and twist firmly. This will separate the two halves, revealing the battery compartment.
Use a paperclip to carefully remove the old battery and insert the new one, making sure it’s oriented correctly. Snap the key’s internal components back together. Align the buttons with the corresponding openings on the key’s exterior, replace the back cover, and re-insert the screws to secure it.
Replacing the lexus ct200h key fob battery in a smart key is even simpler. Locate the release button for the mechanical key and slide it to release the key. Pull the metal key out of the fob. This will expose a small notch or indentation inside the key fob.
Alt text: Detaching the emergency metal key from a Lexus smart key fob to access the battery compartment.
Insert the flat end of the mechanical key into this indentation and twist gently. The key fob will split open, revealing the circuit board and the battery.
Alt text: Opened Lexus smart key fob showing the CR1632 battery that needs replacement.
Use a paperclip to pop out the old battery and replace it with a new one. Recent Lexus models, including the CT200h, typically use either a CR1632 or a CR1616 battery. Ensure the new battery is seated snugly and matches the circular outline inside the fob for correct polarity. Snap the two halves of the fob back together until they click securely. Finally, slide the metal key back into the fob.
While the exact steps might vary slightly across Lexus models, changing the lexus ct200h key fob battery should be a relatively straightforward process. However, if you prefer not to do it yourself, your local Lexus Centre is always available to assist you with lexus ct200h key fob battery replacement and other services.
