Lexus UX 300e (2022 year). Manual in english - page 2

46

1-2. Child safety

Points to remember: P.46
When using a child restraint system: 
P.47
Child restraint system compatibility for 
each seating position: P.50
Child restraint system installation 
method: P.55
• Fixed with a seat belt: P.56
• Fixed with an ISOFIX lower anchor-

age: P.58

• Using a top tether anchorage: P.59



Prioritize and observe the warnings, 
as well as the laws and regulations 
for child restraint systems.



Use a child restraint system until the 
child becomes large enough to 
properly wear the vehicle’s seat 
belt.



Choose a child restraint system 
appropriate to the age and size of 
the child.



Note that not all child restraint sys-
tems can fit in all vehicles.
Before using or purchasing a child 
restraint system, check the compati-
bility of the child restraint system 
with seat positions.

Child restraint systems

Before installing a child restraint 
system in the vehicle, there are pre-
cautions that need to be observed, 
different types of child restraint sys-
tems, as well as installation meth-
ods, etc., written in this manual.



Use a child restraint system when 
riding with a small child that can-
not properly use a seat belt. For 
the child’s safety, install the child 
restraint system to a rear seat. Be 
sure to follow the installation 
method that is in the operation 
manual enclosed with the 
restraint system.



The use of a Lexus genuine child 
restraint system is recommended, 
as it is safer to use in this vehicle. 
Lexus genuine child restraint sys-
tems are made specifically for 
Lexus vehicles. They can be pur-
chased at a Lexus dealer.

Table of contents

Points to remember

WARNING

Q

When a child is riding

Observe the following precautions. 

Failure to do so may result in death or 

serious injury.

O

For effective protection in automobile 

accidents and sudden stops, a child 

must be properly restrained, using a 

seat belt or child restraint system 

which is correctly installed. For instal-

lation details, refer to the operation 

manual enclosed with the child 

restraint system. General installation 

instruction is provided in this manual.

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Q

When installing a child restraint 
system to the front passenger seat

For the safety of a child, install a child 
restraint system to a rear seat. When 
installing a child restraint system to the 
front passenger seat is unavoidable, 
adjust the seat as follows and install the 
child restraint system:



Adjust the seatback angle to the 
most upright position.

When installing a forward-facing child 
seat, if there is a gap between the child seat 
and the seatback, adjust the seatback 
angle until good contact is achieved.



Move the front seat fully rearward.



Adjust the seat height to the upper-
most position.



Adjust the front of the seat cushion 
to the lowest position.



If the head restraint interferes with 
the child restraint system installation 
and the head restraint can be 
removed, remove the head 
restraint. Otherwise, put the head 
restraint in the upper most position.

WARNING

O

Lexus strongly urges the use of a 

proper child restraint system that con-

forms to the weight and size of the 

child, installed on the rear seat. 

According to accident statistics, the 

child is safer when properly restrained 

in the rear seat than in the front seat.

O

Holding a child in your or someone 

else’s arms is not a substitute for a child 

restraint system. In an accident, the 

child can be crushed against the wind-

shield or between the holder and the 

interior of the vehicle.

Q

Handling the child restraint system

If the child restraint system is not prop-

erly fixed in place, the child or other pas-

sengers may be seriously injured or even 

killed in the event of sudden braking, 

sudden swerving, or an accident.

O

If the vehicle were to receive a strong 

impact from an accident, etc., it is pos-

sible that the child restraint system has 

damage that is not readily visible. In 

such cases, do not reuse the restraint 

system.

O

Depending on the child restraint sys-

tem, installation may be difficult or 

impossible. In those cases, check 

whether the child restraint system is 

suitable for installment in the vehicle. 

(



P.50) Be sure to install and 

observe the usage rules after carefully 

reading the child restraint system fix-

ing method in this manual, as well as 

the operation manual enclosed with 

the child restraint system.

O

Keep the child restraint system prop-

erly secured on the seat even if it is not 

in use. Do not store the child restraint 

system unsecured in the passenger 

compartment.

O

If it is necessary to detach the child 

restraint system, remove it from the 

vehicle or store it securely in the lug-

gage compartment.

When using a child restraint sys-
tem

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1-2. Child safety

WARNING

Q

When using a child restraint system

Observe the following precautions.

Failure to do so may result in death or 

serious injury.

O

Never use a rear-facing child restraint 

system on the front passenger seat 

when the airbag manual on-off switch 

is on. (



P.202)

The force of the rapid inflation of the 

front passenger airbag can cause 

death or serious injury to children in 

the event of an accident.

O

There is a label(s) on the passenger 

side sun visor, indicating it is forbidden 

to attach a rear-facing child restraint 

system to the front passenger seat.

Details of the label(s) are shown in the 

illustration below.

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WARNING

WARNING

O

Only put a forward-facing child 

restraint system on the front seat when 

unavoidable. When installing a for-

ward-facing child restraint on the front 

passenger seat, move the seat as far 

back as possible. Failing to do so may 

result in death or serious injury if the 

airbags deploy (inflate).

O

Do not allow the child to lean his/her 

head or any part of his/her body 

against the door or the area of the seat, 

front or rear pillars, or roof side rails 

from which the SRS side airbags or 

SRS curtain shield airbags deploy even 

if the child is seated in the child 

restraint system. It is dangerous if the 

SRS side and curtain shield airbags 

inflate, and the impact could cause 

death or serious injury to the child.

O

When a junior seat is installed, always 

ensure that the shoulder belt is posi-

tioned across the center of the child’s 

shoulder. The belt should be kept away 

from the child’s neck, but not so that it 

could fall off the child’s shoulder.

O

Use a child restraint system suitable to 

the age and size of the child and install 

it to the rear seat.

50

1-2. Child safety

Q

Child restraint system compatibil-
ity for each seating position

Compatibility of each seating position 
with child restraint systems (



P.51) 

displays the type of child restraint sys-
tems that can be used and possible 
seating positions for installation using 
symbols.
Also, the recommended child restraint 
system that is suitable for your child 
can be selected. Otherwise, check 
“Recommended child restraint sys-
tems and Compatibility table” for rec-
ommended child restraint systems. 
(



P.54)

Check the selected child restraint sys-
tem together with the following 
“Before confirming the compatibility of 
each seating position with child 
restraint systems”.

Q

Before confirming the compatibil-
ity of each seating position with 
child restraint systems

1

Check the child restraint system 
standards.
Use a child restraint system that 
conforms to UN(ECE) R44

*1

 or 

UN(ECE) R129

*1, 2

.

The following approval mark is dis-
played on child restraint systems 
which are conformed.
Check for an approval mark 
attached to the child restraint sys-
tem.

Example of the displayed regulation Num-
ber

UN(ECE) R44 approval mark

*3

The weight range of the child who is 
applicable for an UN(ECE) R44 
approval mark is indicated.

UN(ECE) R129 approval mark

*3

The height range of the child who is 
applicable as well as available 
weights for an UN(ECE) R129 
approval mark is indicated.

WARNING

O

If the driver’s seat interferes with the 

child restraint system and prevents it 

from being attached correctly, attach 

the child restraint system to the right-

hand rear seat (left-hand drive vehi-

cles) or the left-hand rear seat (right-

hand drive vehicles). (



P.54)

Child restraint system compati-
bility for each seating position

A

B

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2

Check the category of the child 
restraint system.
Check the approval mark of the 
child restraint system for which of 
the following categories the child 
restraint system is suitable.
Also, if there are any uncertainties, 
check the user’s guide included 
with the child restraint system or 
contact the retailer of the child 
restraint system.

• “universal”
• “semi-universal”
• “restricted”
• “vehicle specific”

*1

: UN(ECE) R44 and UN(ECE) R129 

are U.N. regulations for child restraint 
systems.

*2

: The child restraint systems mentioned 

in the table may not be available outside 
of the EU area.

*3

: The displayed mark may differ depend-

ing on the product.

Q

Compatibility of each seating posi-
tion with child restraint systems



Left-hand drive vehicles



Right-hand drive vehicles

 

*1, 2, 3, 5

*4

 

*3

52

1-2. Child safety

*1

: Move the front seat fully rearward. If the 

passenger seat height can be adjusted, 
move it to the upper most position.

*2

: Adjust the seatback angle to the most 

upright position. When installing a for-
ward-facing child seat, if there is a gap 
between the child seat and the seat-
back, adjust the seatback angle until 
good contact is achieved.

*3

: If the head restraint interferes with your 

child restraint system, and the head 
restraint can be removed, remove the 
head restraint.
Otherwise, put the head restraint in the 
upper most position.

*4

: Use only a front-facing child restraint 

system when the airbag manual on-off 
switch is on.

*5

: Not suitable for child restraint systems 

with support leg.

 

*3

 

*3

Suitable for “universal” category 
child restraint system fixed with 
the seat belt.
Suitable for child restraint sys-
tems given on recommended 
child restraint systems and com-
patibility table (



P. 54).

Suitable for i-Size and ISOFIX 
child restraint system.

Includes a top tether anchorage 
point.
Never use a rear-facing child 
restraint system on the front pas-
senger seat when the airbag man-
ual on-off switch is on.

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Q

Detail information for child restraint systems installation

ISOFIX child restraint systems are divided into different “fixture”. The child 
restraint system can be used in the seating positions for “fixture” mentioned in the 
table above. For kind of “fixture” relation, confirm the following table.
If your child restraint system has no kind of “fixture” (or if you cannot find informa-
tion in the table below), please refer to the child restraint system “vehicle list” for 
compatibility information or ask the retailer of your child seat.

Seat position number

Seating position

Airbag manual on-

off switch

ON

OFF

Seating position suitable for 

universal belted (Yes/No)

All universal categories 

(group 0, 0+, I, II, and III)

Yes

For-

ward-
facing 

only

Yes

Yes

Yes

Yes

i-Size seating position 

(Yes/No)

No

No

Yes

No

Yes

Seating position suitable for 

lateral fixture (L1/L2/No)

No

No

No

No

No

Suitable rearward facing fix-

ture (R1/R2X/R2/R3/No)

No

No

R1, R2

No

R1, R2

Suitable forward facing fix-

ture (F2X/F2/F3/No)

No

No

F2X, F2, 

F3

No

F2X, F2, 

F3

Suitable junior seat fixture 

(B2/B3/No)

No

No

B2, B3

No

B2, B3

Fixture

Description

F3

Full-height, forward-facing child restraint systems

F2

Reduced-height forward-facing child restraint systems

F2X

Reduced-height forward-facing child restraint systems

R3

Full-size, rearward-facing child restraint systems

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1-2. Child safety

Q

Recommended child restraint systems and Compatibility table

The child restraint systems mentioned in the table may not be available outside the 
EU countries and United Kingdom.
When securing some types of child 
restraint systems in rear seat, it may not 
be possible to properly use the seat 

belts in positions next to the child 
restraint without interfering with it or 
affecting seat belt effectiveness. Be 

R2

Reduced-size, rearward-facing child restraint systems

R2X

Reduced-size, rearward-facing child restraint systems

R1

Rearward-facing infant seat

L1

Left lateral-facing (carrycot) infant seat

L2

Right lateral-facing (carrycot) infant seat

B2

Junior seat

B3

Junior seat

Mass groups

Recommended Child 

Restraint System

Seating position

Airbag manual 

on-off switch

ON

OFF

0, 0+
Up to 13 kg
(28 lb.)

LEXUS G0+, BABY SAFE 
PLUS (Yes/No)

No

Yes

Yes

Yes

Yes

I
9 to 18 kg
(20 to 39 lb.)

LEXUS DUO PLUS 
(Yes/No)

Yes

Belt Fix 

Only

Yes

Belt Fix 

Only

Yes

Yes

Belt Fix 

Only

Yes

II, III
15 to 36 kg
(34 to 79 lb.)

LEXUS KIDFIX XP SICT 
(Yes/No)

Yes

Belt Fix 

Only

Yes

Belt Fix 

Only

Yes

Yes

Belt Fix 

Only

Yes

LEXUS MAXI PLUS 
(Yes/No)

Yes

Belt Fix 

Only

Yes

Belt Fix 

Only

Yes

Yes

Belt Fix 

Only

Yes

Fixture

Description

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sure your seat belt fits snugly across 
your shoulder and low on your hips. If it 
does not, or if it interferes with the child 
restraint, move to a different position. 
Failure to do so may result in death or 
serious injury.



When installing a child restraint in 
the rear seats, adjust the front seat 
so that it does not interfere with the 
child or child restraint system.



When installing a child seat with 
support base, if the child seat inter-
feres with the seatback when latch-
ing it into the support base, adjust 
the seatback rearward until there is 
no interference.



If the seat belt shoulder anchor is 
ahead of the child seat belt guide, 

move the seat cushion forward.



When installing a junior seat, if the 
child in your child restraint system is 
in a very upright position, adjust the 
seatback angle to the most comfort-
able position. And if the seat belt 
shoulder anchor is ahead of the 
child seat belt guide, move the seat 
cushion forward.

Confirm with the operation manual enclosed with the child restraint system about 
the installation of the child restraint system.

Child restraint system installation method

56

1-2. Child safety

Q

Installing child restraint system 
using a seat belt

Install the child restraint system in 
accordance to the operation manual 
enclosed with the child restraint sys-
tem.
If the child restraint system on hand is 

not within the “universal” category (or 
the necessary information is not in the 
table), refer to the “Vehicle List” pro-
vided by the child restraint system 
maker for various possible installation 
positions, or check the compatibility 
after asking the retailer of the child 
seat. (



P.50)

1

If installing the child restraint sys-
tem to the front passenger seat is 

Installation method

Page

Seat belt attachment

P.56

ISOFIX lower anchorage 

attachment

P.58

Top tether anchorage 

attachment

P.59

Child restraint system fixed with 
a seat belt

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unavoidable, refer to P.47 for front 
passenger seat adjustment.

2

If the head restraint interferes with 
the child restraint system and the 
head restraint can be removed, 
remove the head restraint. Other-
wise, put the head restraint in the 
upper most position. (



P.202)

3

Run the seat belt through the child 
restraint system and insert the plate 
into the buckle. Make sure that the 
belt is not twisted. Securely fix the 
seat belt to the child restraint sys-
tem in accordance to the directions 
enclosed with the child restraint 
system.

4

If your child restraint system is not 
equipped with a lock-off (a seat belt 
locking feature), secure the child 
restraint system using a locking 
clip.

5

After installing the child restraint 
system, rock it back and forth to 
ensure that it is installed securely. 
(



P.58)

Q

Removing a child restraint system 
installed with a seat belt

Press the buckle release button and 
fully retract the seat belt.

When releasing the buckle, the child 
restraint system may spring up due to the 
rebound of the seat cushion. Release the 
buckle while holding down the child 
restraint system.
Since the seat belt automatically reels itself, 
slowly return it to the stowing position.

Q

When installing a child restraint system

You may need a locking clip to install the 

child restraint system. Follow the instruc-

tions provided by the manufacturer of the 

system. If your child restraint system does 

not provide a locking clip, you can purchase 

the following item from any authorized 

Lexus retailer or Lexus authorized repairer, 

or any reliable repairer: Locking clip for 

child restraint system

(Part No. 73119-22010)

WARNING

Q

When installing a child restraint sys-

tem

Observe the following precautions. 

Failure to do so may result in death or 

serious injury.

O

Do not allow children to play with the 

seat belt. If the seat belt becomes 

twisted around a child’s neck, it may 

lead to choking or other serious inju-

ries that could result in death. If this 

occurs and the buckle cannot be 

unfastened, scissors should be used to 

cut the belt.

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Q

ISOFIX lower anchorages (ISO-
FIX child restraint system)

Lower anchorages are provided for 
the outboard rear seats. (Marks dis-
playing the location of the anchorages 
are attached to the seats.)

Q

Installation with ISOFIX lower 
anchorage (ISOFIX child restraint 
system)

Install the child restraint system in 
accordance to the operation manual 
enclosed with the child restraint sys-
tem.
If the child restraint system on hand is 
not within the “universal” category (or 
the necessary information is not in the 
table), refer to the “Vehicle List” pro-
vided by the child restraint system 
maker for various possible installation 
positions, or check the compatibility 
after asking the retailer of the child 
seat. (



P.50)

1

If the head restraint interferes with 
the child restraint system and the 
head restraint can be removed, 
remove the head restraint. Other-
wise, put the head restraint in the 
upper most position. (



P.202)

2

Remove the anchorage covers, and 
install the child restraint system to 
the seat.

The bars are installed behind the anchor-

WARNING

O

Ensure that the belt and plate are 

securely locked and the seat belt is not 

twisted.

O

Shake the child restraint system left 

and right, and forward and backward 

to ensure that it has been securely 

installed.

O

After securing a child restraint system, 

never adjust the seat.

O

When a junior seat is installed, always 

ensure that the shoulder belt is posi-

tioned across the center of the child’s 

shoulder. The belt should be kept away 

from the child’s neck, but not so that it 

could fall off the child’s shoulder.

O

Follow all installation instructions pro-

vided by the child restraint system 

manufacturer.

Child restraint system fixed with 
an ISOFIX lower anchorage

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age covers.

3

After installing the child restraint 
system, rock it back and forth to 
ensure that it is installed securely. 
(



P.58)

Q

Top tether anchorages

Top tether anchorages are provided 
for the outboard rear seats.

Use top tether anchorages when fixing 
the top strap.

Top tether anchorages

Top strap

Q

Fixing the top strap to the top 
tether anchorage

Install the child restraint system in 
accordance to the operation manual 
enclosed with the child restraint sys-
tem.

1

If the head restraint interferes with 
the child restraint system and the 
head restraint can be removed, 
remove the head restraint. Other-
wise, put the head restraint in the 
upper most position. (



P.202)

WARNING

Q

When installing a child restraint sys-

tem

Observe the following precautions. 

Failure to do so may result in death or 

serious injury.

O

After securing a child restraint system, 

never adjust the seat.

O

When using the lower anchorages, be 

sure that there are no foreign objects 

around the anchorages and that the 

seat belt is not caught behind the child 

restraint system.

O

Follow all installation instructions pro-

vided by the child restraint system 

manufacturer.

Using a top tether anchorage

A
B

60

1-2. Child safety

2

Latch the hook onto the top tether 
anchorage and tighten the top 
strap.

Make sure the top strap is securely 

latched. (



P.58)

When installing the child restraint system 

with the head restraint raised, be sure to 

have the top strap pass underneath the 

head restraint.

Top strap

Hook

WARNING

Q

When installing a child restraint sys-

tem

Observe the following precautions. 

Failure to do so may result in death or 

serious injury.

O

Firmly attach the top strap and make 

sure that the belt is not twisted.

O

Do not attach the top strap to anything 

other than the top tether anchorage.

O

After securing a child restraint system, 

never adjust the seat.

O

Follow all installation instructions pro-

vided by the child restraint system 

manufacturer.

A
B

O

When installing the child restraint sys-

tem with the head restraint being 

raised, after the head restraint has 

been raised and then the top tether 

anchorage has been fixed, do not 

lower the head restraint.

61

1

1-3. Emergency assistance

For
 sa

fe

ty

 an

d s

ec

uri

ty

1-3.Emergency assistance

*

: Operates within the eCall coverage. 

The system name differs depending on 
the country.

“SOS” button

*

Indicator lights

Microphone

Speaker

*

: This button is intended for communica-

tion with the eCall system operator.
Other SOS buttons available in other 
systems of a motor vehicle do not relate 
to the device and are not intended for 
communication with the eCall system 

operator.

Q

Automatic Emergency Calls

If any airbag deploys, the system is 
designed to automatically call the 
eCall control center.

*

 The answering 

operator receives the vehicle’s loca-
tion, the time of the incident and the 
vehicle VIN, and attempts to speak 
with the vehicle occupants to assess 
the situation. If the occupants are 
unable to communicate, the operator 
automatically treats the call as an 
emergency and contacts the nearest 
emergency services provider (112 sys-
tem etc.) to describe the situation and 
request that assistance be sent to the 
location.

*

: In some cases, the call cannot be made. 

(



P.62)

Q

Manual Emergency Calls

In the event of an emergency, press the 
“SOS” button to call the eCall control 
center.

*

 The answering operator will 

determine your vehicle’s location, 
assess the situation, and dispatch the 
necessary assistance required.
Make sure to open the cover before 
pressing the “SOS” button.

eCall

*

eCall is a telematics service that 
uses Global Navigation Satellite 
System (GNSS) data and embed-
ded cellular technology to enable 
the following emergency calls to be 
made: Automatic emergency calls 
(Automatic Collision Notification) 
and manual emergency calls (by 
pressing the “SOS” button). This 
service is required by European 
Union Regulations.

System components

A
B
C
D

Emergency Notification Ser-
vices