NHTSA ID Number: 11032489
Manufacturer Communication Number: T-SB-0030-26
TSB/Document Date: 2026-05-08
Summary
Some 2026 bZ vehicles with head unit version 2199 may exhibit a condition where the audio playback is choppy across all audio sources.
T-SB-0030-26
April 30, 2026
Audio Playback is Choppy Across All Sources
Service
Category
Audio/Visual/Telematics
Section
Audio/Video
Market USA
Applicability
YEAR(S)
MODEL(S)
2026
bZ
ADDITIONAL INFORMATION
Introduction
Some 2026 bZ vehicles with head unit version 2199 may exhibit a condition where the audio
playback is choppy across all audio sources. Follow the instructions in this bulletin to address
this condition.
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EL2523
Sof tware Update
0.5
86100-42K##*
87
74
*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 Toyota Basic Warranty. This warranty is in effect for 36 months
or 36,000 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.
© 2026 Toyota Motor Sales, USA
Page 1 of 7
T-SB-0030-26
April 30, 2026
Page 2 of 7
Audio Playback is Choppy Across All Sources
Calibration Information
MODEL
MODEL YEAR
HEAD UNIT
TYPE
CALIBRATION ID
bZ
2026
Premium
HU
rb_update_2026_BZ_NP_HU_C_02222.zip
MULTIMEDIA SOFTWARE FILE DOWNLOAD
• The multimedia software update file may be downloaded directly from this Service Bulletin by
clicking on the file name in the table above.
• Once downloaded, do NOT extract (unzip) the rb_update file; simply drag and drop the file
onto to a blank USB flash drive.
• Do not put multiple files on the same USB flash drive at the same time, or the update will
not begin.
• Confirm there is no “(1)” or similar suffix on the file due to multiple downloads.
• Do NOT rename the file unless it is to remove “(1)” or similar.
• Use a blank USB flash drive from a trusted name-brand manufacturer with the
following specifications:
• Storage capacity: 4.0 – 32 GB.
• File format: FAT 32 (Windows®).
• Communication format: USB 2.0 or newer. USB 3.0 has proven to be faster.
• USB flash drives larger than 32 GB that can be partitioned to smaller sizes will NOT work.
• USB-C port vehicles will require a USB-C flash drive or adapter that is capable of
transferring data (not just charging).
Repair Procedure
1. Does the vehicle exhibit a condition where the audio playback is choppy across all
audio sources?
•
YES — Continue to step 2.
•
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Is the HU version 2199 currently installed? (Reference the Verifying Software Version section
on page 3.)
•
YES — Continue to the USB Update Procedure section on page 4.
•
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
© 2026 Toyota Motor Sales, USA
T-SB-0030-26
April 30, 2026
Audio Playback is Choppy Across All Sources
Verifying Software Version
1. Select the gear icon, scroll down, and
select Software update.
Figure 1.
2. Select Model info.
Figure 2.
3. Confirm the HU version.
Select the X to exit the model info screen.
Figure 3.
© 2026 Toyota Motor Sales, USA
Page 3 of 7
T-SB-0030-26
April 30, 2026
Page 4 of 7
Audio Playback is Choppy Across All Sources
USB Update Procedure
1. Download the HU file from the Software Update Information section onto an empty
USB flash drive.
2. Select the gear icon and scroll down to
select Software update.
Figure 4.
3. Insert the prepared USB flash drive
containing the HU file into the vehicle’s
data USB port. A “Checking USB memory”
message will display. The wait time can take
5 – 10 minutes.
Figure 5.
NOTE
Figure 6.
Af ter inserting the USB f lash drive, two
banners should appear:
1. A blue “USB device connected” banner,
as shown in Figure 5.
2. An orange “Device no response” banner;
this is because there are no media f iles
on the USB f lash drive. This is normal.
Figure 7.
If the blue “USB device connected” banner
does not appear, the USB f lash drive may be
f ormatted incorrectly or inoperative.
© 2026 Toyota Motor Sales, USA
T-SB-0030-26
April 30, 2026
Audio Playback is Choppy Across All Sources
USB Update Procedure (continued)
4. Select Continue when the message in
Figure 8 appears.
Figure 8.
5. Select Accept on the Terms of
service screen.
Figure 9.
6. Once the head unit software begins the
installation, the update can take up to
10 – 15 minutes.
Figure 10.
NOTICE
To prevent damaging the head unit,
follow the five requirements below during
this software update install step.
•
•
•
•
•
Do NOT turn IG OFF.
Do NOT turn ACC OFF.
Do NOT press CANCEL.
Do NOT turn the head unit OFF.
Do NOT remove the USB flash drive
until instructed in step 9.
© 2026 Toyota Motor Sales, USA
Page 5 of 7
T-SB-0030-26
April 30, 2026
Audio Playback is Choppy Across All Sources
USB Update Procedure (continued)
A. When the update is complete, the
message “Install Complete” will show
on the head unit, as shown in Figure 11.
Figure 11.
B. The “Software installation complete”
pop-up message may also appear, as
shown in Figure 12.
Figure 12.
7. Restart the vehicle:
A. Turn IG/ACC OFF
B. Open driver door
C. Close driver door
D. Open driver door
E. Close driver door
F. Turn IG ON
8. Wait two minutes.
9. After the system has successfully booted up, remove the USB flash drive.
© 2026 Toyota Motor Sales, USA
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T-SB-0030-26
April 30, 2026
Page 7 of 7
Audio Playback is Choppy Across All Sources
USB Update Procedure (continued)
10. Perform steps 1 – 3 of the Verifying Software Version section to confirm the software version
matches the table below.
Table 2. Software Version Information
TYPE
CURRENT VERSION
HU Version
2222
Figure 13.
NOTE
Failing to perf orm steps 7 – 9 can cause the
pop-up in Figure 13 to appear. If so, insert a
blank USB to remove the .JSON f iles. These
f iles are not needed and can be deleted f rom
the USB.
© 2026 Toyota Motor Sales, USA
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TSB/Document ID: T-SB-0030-26
Replacement Service Bulletin Number:
MFR Communication Date: 2026-04-30
MFR Internal Campaign ID/Software Version: T-SB-0030-26
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
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