2019 LEXUS RX350 engine

390 4-6. Driving tips
RX350/RX350L_U WARNING ■
Off-road driving precautions
Always observe the following precautions to minimize the risk of death, serious injury
or damage to your vehicle: ●
Drive carefully when off the road. Do not ta ke unnecessary risks by driving in danger-
ous places. ●
Do not grip the steering wheel spokes when driving off-road. A bad bump could jerk
the wheel and injure your hands. Keep both hands and especially your thumbs on the
outside of the rim. ●
Always check your brakes for effectiveness immediately after driving in sand, mud,
water or snow. ●
After driving through tall grass, mud, rock , sand, rivers, etc., check that there is no
grass, bush, paper, rags, stone, sand, etc. adhering or trapped on the underbody.
Clear off any such matter from the underbody. If the vehicle is used with these materi-
als trapped or adhering to the underbody, a breakdown or fire could occur. ●
When driving off-road or in rugged terrain , do not drive at excessive speeds, jump,
make sharp turns, strike obje cts, etc. This may cause loss of control or vehicle rollover
causing death or serious injury. You are also risking expensive damage to your vehi-
cle’s suspension and chassis.
NOTICE ■
To prevent water damage
Take all necessary safety measures to ensure that water damage to the engine or other
components does not occur. ●
Water entering the engine air intake will cause severe engine damage.●
Water entering the automatic transmission will cause deterioration in shift quality,
locking up of your transmission accompan ied by vibration, and ultimately damage.●
Water can wash the grease from wheel be arings, causing rusting and premature fail-
ure, and may also enter the differential, transmission and transfer (AWD models only)
case, reducing the gear oi l’s lubricating qualities.■
When you drive through water
If driving through water, such as when cro ssing shallow streams, first check the depth of
the water and the bottom of the riverbed for firmness. Drive slowly and avoid deep
water. ■
Inspection after off-road driving ●
Sand and mud that has accumulated around brake discs may affect braking efficiency
and may damage brake system components. ●
Always perform a maintenance inspection afte r each day of off-road driving that has
taken you through rough terrain, sand, mud, or water. For scheduled maintenance
information, refer to the “Warranty and Services Guide/Owner’s Manual Supple-
ment/Scheduled Maintenance”.

3995-1. Basic Operations
5
Lexus Display Audio system
RX350/RX350L_U ■
When using the screen ●
Under extremely cold conditions, the Lexus Display Audio controller may react slowly.●
If the screen is cold, the display may be da rk, or the system may seem to be operating
slightly slower than normal. ●
The screen may seem dark and hard to see when viewed through sunglasses. Change
your angle of viewing, adjust the display on the “Display” screen (  P. 411) or remove
your sunglasses. ■
Using cellular phones
Interference may be heard through the audi o system’s speakers if a cellular phone is
being used inside or close to the vehicle while the audio system is operating.
WARNING ■
Using the Lexus Display Audio controller
Be careful when touching the Lexus Display Audio controller in extreme temperatures
as it may become very hot or cold due to the temperature inside the vehicle. ■
Laser product ●
CAUTION
USE OF CONTROL OR ADJUSTMENT OR PERFORMANCE OF PROCE-
DURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARD-
OUS RADIATION EXPOSURE. ●
CAUTION
THE USE OF OPTICAL INSTRUMENTS WITH THIS PRODUCT WILL
INCREASE EYE HAZARD.
NOTICE ■
To prevent Lexus Display Au dio controller malfunction●
Do not allow the Lexus Display Audio controll er to come into contact with food, liq-
uid, stickers or lit cigarettes as doing so may cause it to change color, emit a strange
odor or stop functioning. ●
Do not subject the Lexus Display Audio cont roller to excessive pressure or strong
impact as the controller may bend or break off.■
To prevent battery discharge
Do not leave the audio system on longer than necessary when the engine is off. ■
To avoid damaging the audio system
Take care not to spill drinks or other fluids on the audio system.

4475-7. Connecting Bluetooth ®
5
Lexus Display Audio system
RX350/RX350L_U When a registered Bluetooth ®
audio player is in standby for a connection, it will
automatically connect to the system wh en the engine switch is turned to
ACCESSORY or IGNITION ON mode.
When automatic connection priority is se t to on and there is more than one reg-
istered Bluetooth ®
audio player available, the system will automatically connect
to the Bluetooth ®
audio player with the highest priority. (  P. 450)
Operate the portable player and connect it to the Bluetooth ®
audio system.
Go to “Bluetooth
* 1
Setup”: “MENU” button  “Setup”  “Bluetooth
* 1
”
Select the device to connect.
Select “Connect XX
* 2
” or “Connect as an Audio Player”.
If the desired Bluetooth ®
device is not displayed, register the device.
(  P. 445)
* 1
: Bluetooth is a registered trademark of Bluetooth SIG, Inc.
* 2
: XX represents the selected device name.Connecting a Bluetooth ®
audio playerThere are 2 portable audio player conne ction settings available: connecting
from the vehicle and connectin g from the portable player.
Connecting method is set to “Vehicle”
Connecting method is set to “Device” 1
2
3

448 5-7. Connecting Bluetooth ®
RX350/RX350L_U When you register a phone, auto conn ection will be activated. It is recom-
mended to have the system set to this mode and leave the Bluetooth ®
phone in a
place where a good connection can be established.
When the engine switch is turned to ACCESSORY or IGNITION ON mode,
the system will search for a nearby cellular phone you have registered.
Next, the system automatically connects with the most recent phone that was
connected. The connected result is displayed.
When automatic connection priority is se t to on and there is more than one reg-
istered Bluetooth ®
phone available, the system will automatically connect to the
Bluetooth ®
phone with the highest priority. (  P. 450)
When auto connection has failed or “Bluetooth
* 1
Power” is turned off, you must
connect the Bluetooth ®
device manually.
Go to “Bluetooth
* 1
Setup”: “MENU” button  “Setup”  “Bluetooth
* 1
”
Select the device to connect.
Select “Connect XX
* 2
”, “Connect as a Phone” or “Connect as an Audio
Player”.
If the desired Bluetooth ®
device is not displayed, register the device.
(  P. 445)
* 1
: Bluetooth is a registered trademark of Bluetooth SIG, Inc.
* 2
: XX represents the selected device name. ■
Reconnecting a Bluetooth ®
phone
If the system cannot connect due to poor signal strength with the engine switch in
ACCESSORY or IGNITION ON mode, the syst em will automatically attempt to recon-
nect. ■
Connecting a phone while Bluetooth ®
audio is playing●
Bluetooth ®
audio will stop temporarily.●
It may take time to connect.Connecting a Bluetooth ®
phoneThere are two connecting methods available: automatic and manual.
Auto connection
Manual connection 1
2
3

470 5-10. Phonebook
RX350/RX350L_U You can register the desired contact from the phonebook. Up to 15 contacts per
phone can be registered.
Go to “Add Favorite”: “MENU” button  “Setup”  “Phone”  “Contacts/
Call History”  “Add Favorite”
Choose the contact to register.
Go to “Remove Favorite”: “MENU” button  “Setup”  “Phone”  “Con-
tacts/Call History”  “Remove Favorite”
Select the desired contacts. You can select all contacts by selecting “Select All”.
Move the controller to the left and select “Remove”.
Go to “Delete Contact ”: “MENU” button  “Setup”  “Phone”  “Con-
tacts/Call History”  “Delete Contact”
Select the desired contacts. You can select all contacts by selecting “Select All”.
Move the controller to the left and select “Delete”.■
Phonebook data
Phonebook data is managed separately for every registered phone. When one phone is
connected, you cannot read the registered data of the other phones. ■
When transferring contacts
Transfer contacts while the engine is running.
If the cellular phone is OPP or PBAP compatible, you may need to input “1234” on the
cellular phone for OB EX certification.■
When you have selected “Replace Contacts” or “Add Contact” to transfer contacts
If the cellular phone does not support OPP service, you cannot use these functions. You
can transfer the phonebook data only by operating your phone. ■
Transferring contacts while Bluetooth ®
audio is playing
Bluetooth ®
audio will disconnect. It will reconnect automatically when data transfer fin-
ishes. It may not reconnect dependin g on the phone which is connected.Registering favorites 1
2
Removing favorites
Deleting the contacts data 1
2
3
1
2
3

478 5-11. Bluetooth ®
RX350/RX350L_U ■
Compatible models
The Bluetooth ®
audio system supports portable audi o players with the following specifi-
cations ●
Bluetooth ®
specifications:
Ver. 2.0 or higher (Recommend ed: Ver. 3.0 +EDR or higher)●
Profiles:
• A2DP (Advanced Audio Distribution Profile) Ver. 1.0, or higher
(Recommended: Ver. 1.3 or higher)
This is a profile to transmit stereo audio or high quality sound to the audio system.
• AVRCP (Audio/Video Remote Cont rol Profile) Ver. 1.0 or higher
(Recommended: Ver. 1.5 or higher)
This is a profile to allow re mote control the A/V equipment.
However, please note that some functions may be limited depending on the type of por-
table audio player connected.
The hands-free system supports cellular ph ones with the following specifications.●
Bluetooth ®
specification:
Ver. 2.0 or higher (Recommend ed: Ver. 3.0 +EDR or higher)●
Profiles:
• HFP (Hands Free Profile) Ver. 1.0 or higher (Recommended: Ver. 1.6 or higher)
This is a profile to allow hands-free phone calls using a cellular phone or head set. It
has outgoing and incoming call functions.
• OPP (Object Push Profile) Ver. 1.1 or higher (Recommended: Ver. 1.2)
This is a profile to transfer phonebook data. When a Bluetooth ®
compatible cellular
phone has both PBAP and OPP, OPP cannot be used.
• PBAP (Phone Book Access Profile) Ver. 1.0 or higher (Recommended: Ver. 1.1)
This is a profile to transfer phonebook data.
• MAP (Message Access Pr ofile) Ver.1.0 or higher
This is a profile to using phone message.
If the cellular phone does not support HFP, yo u cannot register it wi th the hands-free sys-
tem. OPP, PBAP or MAP services must be selected individually.■
Reconnecting the portable audio player
If the portable audio player is disconnected due to poor reception when the engine
switch is in ACCESSORY or IGNITION ON mode, the system automatically recon-
nects the portable audio player.
If you have switched off the portable audio pl ayer yourself, follow the instructions below
to reconnect: ●
Select the portable audio player again ●
Enter the portable audio player ■
When you sell your car
Be sure to delete your personal data. (  P. 409)

498 6-1. Basic operation of the Remote Touch screen
RX350/RX350L_U ■
Screen display during low temperatures
When the ambient temperature is extremely low, screen response may be delayed even
if the Remote Touch is operated.
WARNING ■
When using the Remote Touch ●
Do not allow fingers, fingernails or hair to become caught in the Remote Touch as this
may cause an injury. ●
Be careful when selecting the Remote Touch in extreme temperatures as it may
become very hot or cold due to the temperature inside the vehicle.
NOTICE ■
To prevent damage to the Remote Touch ●
Do not allow the Remote Touch to come into contact with food, liquid, stickers or lit
cigarettes as doing so may cause it to change color, emit a strange odor or stop func-
tioning. ●
Do not subject the Remote Touch to excessive pressure or strong impact as the knob
may bend or break off. ●
Do not allow coins, contact lenses or ot her such items to be come caught in the
Remote Touch as this may cause it to stop functioning. ●
Items of clothing may rip if they become caught on the Remote Touch knob. ●
If your hand or any object is on the Remote Touch knob when the engine switch is in
ACCESSORY mode, the Remote Touch knob may not operate properly.

5156-2. Using the air conditioning system and defogger
6
Interior features
RX350/RX350L_U ■
Registering air conditioning settings to elec tronic keys (vehicles with driving position
memory) ●
Unlocking the vehicle using an electronic ke y and turning the engine switch to IGNI-
TION ON mode will recall that key’s re gistered air conditioning settings.●
When the engine switch is tu rned off, the current air cond itioning settings will automat-
ically be registered to the electronic key that was used to unlock the vehicle. ●
The system may not operate correctly if more th an one electronic key is in the vicinity or
if the smart access system with push-button start is used to unlock a passenger door.●
The doors that can recall the air conditioni ng setting when unlocked using the smart
access system with push-b utton start can be changed.
* For details, contact your Lexus
dealer.
* : The doors that can recall the driving positi on memory are changed at the same time.■
Using automatic mode
Fan speed is adjusted automatically according to the temperature setting and the ambi-
ent conditions.
Therefore, the fan may stop for a while until wa rm or cool air is ready to flow immediately
after the “AUTO” button is pressed or “AUTO” is selected. ■
How the system judges if a passenger is in the vehicle when in S-FLOW mode
In S-FLOW mode, the system judges if a passenger is in the vehicle as follows:
• Front passenger seat: A passeng er is judged to be in the front passenger seat when the
system detects an object on the front passe nger seat, fastening of the front passenger
seat belt, changing of the set temperature for the front passenger seat or the opening
and closing of the front passenger door. (However, when only opening and closing of
the front passenger door is detected, the sy stem will judge that a passenger is not in
the front passenger seat after the vehicl e speed reaches approximately 12 mph (20
km/h) or more.)
• Rear seats (automatic S-FLOW mode only): A passenger is judged to be in a rear seat
when the system detects the opening and closin g of a rear door or the operation of the
rear air conditioning system (RX350L).
If a passenger is judged to be in the vehicl e, the system will retain the judgement for a
certain amount of time after th e engine switch is turned off.■
Operation of automatic S-FLOW mode
When the system is operating in automati c S-FLOW mode, if the system detects the
opening and closing of a rear door or the op eration of the rear air conditioning system
(RX350L), S-FLOW mode will be disabled . To enable S-FLOW mode, select on
the option control screen. (I n this case, the system w ill operate in manual S-FLOW
mode.) ■
Changing from manual S-FLOW mode to automatic S-FLOW mode
Select on the option control screen to disable S-FLOW mode.
Turn the engine switch off.
Wait for 60 minutes or more and change the engine switch to IGNITION ON mode.■
Using the voice command system (vehicles with a navigation system)
Air conditioning system can be operated using voic e commands. For details, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL”. 1
2
3