SA-054-21a

BULLETIN NOTES
This service alert supersedes the previously issued service alert listed below. The changes are noted in Red text.
Previous SAs:
Date(s) Issued:
SA-054/21
11/16/21
APPLICABLE MODEL(S)/VINS
2021 Mazda3
2021 CX-30
2021 CX-5
2021 CX-9
2022 MX-30
DESCRIPTION
Some customers may complain about any the following infotainment system concerns:
•
•
•
•
Reboot
Slow reboot in morning
Display frozen
Display blank
NOTE:
• Rear view monitor operation is normal
• No DTC stored
This may be caused by a CMU hardware malfunction.
REPAIR PROCEDURE
1. Verify customer concern.
2. Check for DTCs.
Is DTC stored?
• YES: This service information does not apply. Go to normal MGSS DTC diagnosis.
• NO: Go to next step.
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3. Retrieve 6 digit CMU Serial Number and document it on the repair order. Go to "CMU Serial Number Retrieval"
Is the CMU Serial Number within the affected range? See "Affected CMU Serial Number Range" table.
• YES: Replace the CMU (see Parts Information, part number exceptions) and confirm the CMU replacement part
software is at the latest version (see MGSS -> Infotainment/TCU -> MAZDA CONNECT Updates).
• NO: This service information does not apply. Go to MGSS SA-027/21 diagnostics.
4. Verify repair.
CMU Serial Number Retrieval
CX-5 and CX-9
Mazda3, CX-30, MX-30
1. Press and hold the Volume knob, then press
and hold the Entertainment and Favorites buttons
at the same time for 3-5 seconds and the Factory
/Service Inspection screen will appear.
2. Select "Service Information"
3. Select "Connected Device Information"
4. Select "CMU"
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5. Scroll down to "Serial No." and document on
Repair Order.
6. Return to Factory/Service Inspection main
screen and select End Diag Mode
Affected CMU Serial Number Range and Part Number Suffix
Model
Serial Number Start Serial Number End Affected Part Number
CX-5 and CX-9
687234
754800
TC3P 66 9C0-F
Mazda3 (Japan built)
622110
624748
BDGF 66 9C0-W
Mazda3 (Japan built)
500070
505859
BGMC 66 9C0-D
Mazda3 (Mexico built) and CX-30
216848
227361
DGH9 66 9C0-J
Mazda3 (Mexico built) and CX-30
104005
121788
BGMR 66 9C0-D
Mazda3 Turbo (Japan built)
512261
Current Production
BFWM 66 9C0-B
Mazda3 Turbo (Mexico built) and CX-30 Turbo
111827
113170
BGCE 66 9C0-B
MX-30
500125
500664
DN4E 66 9C0-C
PARTS INFORMATION
Part
Number
Description
Qty.
****-669C0*
UNIT,
CONNECTIVITY
1
Note
• Confirm CMU replacement part software is at the latest version. See MGSS > Infotainment/TCU -> MAZDA CONNECT Updates
• Confirm CMU replacement part Serial Number is not affected.
See "Affected CMU Serial Number Range and Part Number Suffix"
table
○
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