Changing the battery in your Lexus RX350 key fob is a straightforward procedure that ensures your remote entry system continues to function without interruption. This small maintenance task prevents unexpected lockouts and keeps your vehicle secure.
Identifying Your Key Fob Model
Before beginning the process, confirm you have the correct replacement battery for your specific Lexus RX350 key fob. The most common models use a CR2032 3V lithium coin cell, but verifying the current battery size or the model year of your vehicle ensures compatibility. Consult your owner’s manual or the old battery casing for the exact specifications to avoid purchasing an incorrect item.
Tools Required for the Job
Gathering the necessary tools beforehand streamlines the process and eliminates frustration. You will typically need a small Phillips screwdriver or a specialized key fob removal tool, a fresh battery with the correct voltage, and a clean, well-lit workspace. Avoid using metal tools that could scratch the casing or cause a short circuit.
Step-by-Step Key Disassembly
Carefully separate the key fob casing to access the battery compartment without damaging the internal components. Follow these steps to open the unit safely:
Locate the small seam or indentation on the side of the key fob.
Insert the screwdriver or removal tool into the seam and apply gentle pressure.
Twist the tool slowly to pry the two halves apart without forcing it.
Handle the circuit board carefully to avoid static discharge or physical damage.
Removing the Old Battery
Once the key fob is open, the old battery will be visible on the circuit board. Note the orientation of the battery, as the positive and negative terminals must align correctly with the new one. Gently lift the old battery out using your fingers or a non-metallic tool, taking care not to damage the surrounding components.
Installing the New Battery
Position the new battery into the compartment with the correct polarity, ensuring the positive side matches the marking inside the fob. Press the battery firmly into place until it is flush with the compartment floor. Double-check the orientation before closing the case to prevent malfunction.
Reassembling the Key Fob
Align the two halves of the key fob casing and press them together until they snap securely. Verify that the buttons function correctly and the LED light activates when pressing the lock or unlock button. If the fob does not work, open it again to confirm the battery is installed properly and the contacts are clean.
Programming and Testing
After reassembly, test the key fob within close proximity of the vehicle to ensure the signal is recognized. If the remote does not respond, you may need to reprogram the key fob to the vehicle’s system. Refer to the Lexus RX350 owner’s manual for specific programming instructions or visit a dealership if issues persist.
