NHTSA ID Number: 11010097
Manufacturer Communication Number: L-SB-0034-24
TSB/Document Date: 2024-11-06
Summary
Some 2022 – 2024 model year NX 250 and NX 350 vehicles may exhibit a condition where the vehicle displays both a System Malfunction Visit Your Dealer warning message and a brake warning light without any associated Diagnostic Trouble Codes (DTCs).
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TSB/Document ID: L-SB-0034-24
Replacement Service Bulletin Number:
MFR Communication Date: 2024-09-25
MFR Internal Campaign ID/Software Version: L-SB-0034-24
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
L-SB-0034-24
September 25, 2024
System Malfunction Warning Message and Brake
Warning Light Both Displayed Without Any DTC(s)
Service
Category
Brake
Section
Brake System
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2022 - 2024
NX250, NX350
WMI(s): 2T2
Introduction
Some 2022 – 2024 model year NX 250 and NX 350 vehicles may exhibit a condition where the
vehicle displays both a System Malfunction Visit Your Dealer warning message and a brake
warning light without any associated Diagnostic Trouble Codes (DTCs). Follow the Repair
Procedure in this bulletin to address this condition.
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
BR2406
R & R Brake Booster Assembly
2.9
44610-F60##*
8C
99
* Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being repaired
by searching for the parts in the Electronic Parts Catalog using the VIN filter.
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.
© 2024 Lexus, a division of Toyota Motor Sales, USA
Page 1 of 4
L-SB-0034-24
September 25, 2024
Page 2 of 4
System Malfunction Warning Message and Brake Warning Light Both
Displayed Without Any DTC(s)
Parts Information
PART NUMBER
PART NAME
QTY
44610-F6020
Booster Assy, Brake
1
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
DCA-8000 Battery Diagnostic Tool*
DCA-8000P T
1
Required Tools & Equipment
*Essential SST.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335 or by visiting
Home – Service Resources – Lexus Special Service Tools (SSTs).
REQUIRED EQUIPMENT
SUPPLIER
PART NUMBER
Techstream ADVi*
Techstream 2.0
Techstream Lite
QTY
TSADVUNIT
TS2UNIT
ADE
1
TSLITEPDLR01
Techstream Lite (Green Cable)
TSLP2DLR01
*Essential SST.
NOTE
Only ONE of the Techstream units listed above is required.
GTS+ Software version 2024.03.004.02 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787 or by visiting TIS – Diagnostics – Tools & Equipment – Techstream Order Portal.
REQUIRED TOOLS & MATERIAL
FLUID TYPE
QTY
DOT 3 or DOT 4 Brake Fluid
1 – 2 Liters
© 2024 Lexus, a division of Toyota Motor Sales, USA
L-SB-0034-24
September 25, 2024
Page 3 of 4
System Malfunction Warning Message and Brake Warning Light Both
Displayed Without Any DTC(s)
Repair Procedure
1. Confirm the condition exists.
Does the vehicle display BOTH a System
Malfunction Visit Your Dealer warning
message and a brake warning light?
YES — Continue to step 2.
NO — This bulletin does NOT apply.
Continue diagnosis using the
applicable Repair Manual.
Figure 1.
1
2
1
System Malfunction Visit Your Dealer
Warning Message
2
Brake Warning Light
2. Using GTS+, confirm there are NO stored DTC(s).
Does the vehicle have ANY stored DTC(s)?
NO — Continue to step 3.
YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
3. Remove the brake booster assembly.
Refer to TIS, applicable model and model year Repair Manual:
2022 – 2024 NX 250 and NX 350:
Brake – Brake System (Other) – Brake Booster (for Gasoline Model) – Removal
© 2024 Lexus, a division of Toyota Motor Sales, USA
L-SB-0034-24
September 25, 2024
Page 4 of 4
System Malfunction Warning Message and Brake Warning Light Both
Displayed Without Any DTC(s)
Repair Procedure (continued)
4. Install the NEW brake booster assembly.
Refer to TIS, applicable model and model year Repair Manual:
2022 – 2024 NX 250 and NX 350:
Brake – Brake System (Other) – Brake Booster (for Gasoline Model) – Installation
5. Confirm that the System Malfunction Visit Your Dealer warning message and the brake
warning light have both been cleared and the condition no longer exists.
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