Electronic key battery
Replace the battery with a new one if it is discharged.
You will need the following items:
Flathead screwdriver.
Small Phillips-head screwdriver.
Lithium battery (CR1632).
Replacing the battery

Take out the mechanical key.

Remove the cover.

Remove the depleted battery.
Insert a new battery with the “+” terminal facing up.
Use a CR1632 lithium battery
l Batteries can be purchased at your Lexus dealer, local electrical appliance shops or camera stores.
Replace only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the local laws.
If the electronic key battery is discharged
The following symptoms may occur:
The smart access system with push-button start and wireless remote control
will
not function properly.
The operational range is reduced.
When the card key battery needs to be replaced (if equipped)
The battery for the card key is available only at Lexus dealers. Your Lexus
dealer
can replace the battery for you.
CAUTION:
Removed battery and other parts
Keep away from children.
These parts are small and if swallowed by a child, they can cause choking.
NOTICE:
For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
Always work with dry hands.
Moisture may cause the battery to rust.
Do not touch or move any other components inside the remote control.
Do not bend either of the battery terminals.
See also:
Trailer towing (AWD models with towing package)
Your vehicle is designed primarily as a passenger-and-load carrying
vehicle.
Towing a trailer will have an adverse effect on handling, performance,
braking, durability, and fuel consumption. For y ...
INTERIOR
The interior of the RX 350 is surprisingly understated and simple. The wood
trim looks nice, but the black- and silver-colored plastic surfaces could have
appeared more upscale.
After testing a ...
Engine immobilizer system
The vehicle's keys have built-in transponder chips that prevent the engine
from starting if the key has not been previously registered in the vehicle's
on-board computer.
Never leave the keys insid ...
