Replacing the battery in your Lexus RX 350 key fob is a simple task that can save you from the inconvenience of a non-responsive remote. Over time, the key fob battery drains, causing issues with locking, unlocking, or starting your vehicle. Follow these steps to replace and reprogram the battery effectively.

Replacing the Battery

  • Start by locating the small release latch on the back of the key fob.
  • Slide the latch to open the key fob casing carefully, avoiding damage to internal components.
  • Remove the old battery, typically a CR2032 coin cell, and dispose of it properly.
  • Insert the new battery with the positive side facing up.
  • Snap the key fob casing back together securely.

Reprogramming the Key Fob

In most cases, the Lexus RX 350 key fob will not require reprogramming after a battery replacement. However, if your remote does not function properly, follow these general steps:

  1. Enter your vehicle and close all doors.
  2. Insert the key into the ignition and turn it to the "On" position without starting the engine.
  3. Press and hold the lock button on the key fob for about one second, then release.
  4. Turn the ignition off and remove the key.
  5. Test the key fob functions such as locking and unlocking the doors.

If the key fob still does not work after following these steps, consult your local Lexus dealership or a professional locksmith for assistance.