L-SB-0030-19

May 31, 2019

Squeak Noise From Rear Suspension
Service
Category

Suspension

Section

Rear Suspension

Market USA

Applicability
YEAR(S)

MODEL(S)

2016 - 2019

RX350, RX450H

ADDITIONAL INFORMATION

Introduction

Some 2016 – 2019 model year RX350 and RX450h vehicles may exhibit a squeak noise from the
rear suspension. This condition may be more noticeable in colder ambient temperatures and may
occur when traveling over uneven roads or when the vehicle comes to a complete stop. Follow
the Repair Procedure in this bulletin to address this condition.

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

SU1806

R & R Rear Trailing Arm Assembly (One Side)

1.0

Combo A

Opposite Side

0.2

91

99

Combo B

Rear Toe-in Adjustment

0.2

48760-0E051
48760-48061
48780-0E061
48780-48091

APPLICABLE WARRANTY
 This repair is covered under the Lexus Basic Warranty. This warranty is in effect for 48 months
or 50,000 miles, whichever occurs first, from the vehicle’s in-service date.
 Warranty application is limited to occurrence of the specified condition described in
this bulletin.

Parts Information
PART NUMBER

PART NAME

QTY

48760-0E070

Arm Assy, Trailing, RR RH

1

48780-0E080

Arm Assy Trailing, RR LH

1

PREVIOUS

NEW

48760-0E051
48760-48061
48780-0E061
48780-48091

© 2019 Lexus, a division of Toyota Motor Sales, USA

Page 1 of 3

L-SB-0030-19

May 31, 2019

Page 2 of 3

Squeak Noise From Rear Suspension
Required Tools & Equipment
REQUIRED EQUIPMENT

SUPPLIER

PART NUMBER

QTY

ChassisEAR™ (or Equivalent)

ADE

JSPSM06606
(JS Products)

1

NOTE
 A mechanic’s stethoscope or similar tool may be used in place of ChassisEAR™.
 ChassisEAR™ may be ordered by calling Approved Dealer Equipment (ADE) at 1-800-368-6787.

Repair Procedure

1. Confirm the condition exists.
Using ChassisEAR™ (or equivalent),
test-drive the vehicle over an uneven road
surface, such as a sloped driveway, to verify
the condition is coming from the rear trailing
arm bushings.

Figure 1.

HINT
Applying soapy water to the suspected
bushing may temporarily diminish the
noise intensity and help identify the source
of the noise.

1

1

Rear Trailing Arm Bushing

Is a squeak noise present?
 YES — Continue to step 2.


NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.

© 2019 Lexus, a division of Toyota Motor Sales, USA

L-SB-0030-19

May 31, 2019

Page 3 of 3

Squeak Noise From Rear Suspension
Repair Procedure (continued)

2. BEFORE installing NEW parts, confirm the identification mark as shown. If this mark is NOT
present, the part is incorrect and should NOT be installed.
NOTE
The identification mark on the NEW part faces the outside of the vehicle.
Figure 2. LH Side

3.

Figure 3. RH Side

1

1

2

2

1

Identification Mark

1

Identification Mark

2

Front

2

Front

Replace BOTH rear trailing arm assemblies even if only one side is emitting the
squeak noise.
Refer to TIS, applicable model and model year Repair Manual:
 2016 RX350:
Suspension – Rear Suspension – “Rear Suspension: Rear Trailing Arm:
Removal / Installation”


2017 – 2019 RX350:
Suspension – Rear Suspension – “Rear Suspension: Rear Trailing Arm:
Removal / Installation”



2016 RX450h:
Suspension – Rear Suspension – “Rear Suspension: Rear Trailing Arm:
Removal / Installation”



2017 – 2019 RX450h:
Suspension – Rear Suspension – “Rear Suspension: Rear Trailing Arm:
Removal / Installation”

4. Test-drive the vehicle to verify the squeak noise is no longer present.

© 2019 Lexus, a division of Toyota Motor Sales, USA