WenmarOpen by Wenmar Pro

Service bulletins for the 2021 Mazda CX-30

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

616 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
SA-013-21g2021-10-05. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. Some customers may complain about any of the following: Infotainment Center Display does not provide the Authorization Code during the MyMazda App Connected Vehicle enrollment. Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF, MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ". Confirm the customer's phone and vehicle have good to strong reception during the concern as shown in the table below. If the reception is weak, move the vehicle to a location where the reception is good to strong as shown in the table, then try to get the Authorization Code and/or operate the remote functions before proceeding to the Repair Procedure if there is still an issue. If the reception is good to strong, proceed to the Repair Procedure.
SA-004-21c2021-10-05. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to activate the new TCU after replacement. Use the information in this service alert to initialize the new TCU until the procedure on MGSS is updated. CAUTION: DO NOT swap TCU with another vehicle as the TCU is VIN locked after activation. A TCU swap with another vehicle will disable Connected Services on both vehicles. If TCU activation is not performed, connected vehicle functions will not operate. This will have a negative impact on the customer because they will need to return to the dealer for repairs.
DRW41a2021-09-03. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT:ELECTRICAL; COMMUNICATION:MANUFACTURER TELEMATICS. DRW41 - TELEMATICS COMMUNICATION UNIT (TCU) CONCERN - BATTERY DRAIN AND CONNECTED SERVICES. On certain subject 2021 MY CX-5 & CX-9 vehicles, a battery drain concern could occur due to the Telematics Communication Unit (TCU) not going to sleep. In addition, some vehicles were repaired under the cancelled campaign SSPC6, which caused Connected Services to no longer work. This Dealer Rework will repair all concerns to ensure the battery drain concern does not occur and restores Connected Services, if disabled from a prior software update. All Mazda dealers will update the subject vehicles with improved TCU software. This campaign will be expanded to include additional Mazda3 and CX-30 vehicles at a later date, please watch for additional announcements.
SSPC72021-09-03. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; COMMUNICATION:MANUFACTURER TELEMATICS. SSPC7 - SPECIAL SERVICE PROGRAM -TELEMATICS COMMUNICATION UNIT BATTERY DRAIN CONCERN AND CONNECTED SERVICES NOT AVAILABLE
SA-045-21d2021-09-03. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT:ELECTRICAL; ENGINE. Connected vehicle remote functions inoperative and/or engine no start due to low battery voltage. NOTE: SA-045/21 HAS BEEN SUPERCEDED TO SSPC7.
SA-045-21c2021-09-03. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE. Connected vehicle remote functions inoperative and/or engine no start due to low battery voltage. Some customers may experience the following symptoms: Connected Vehicle Remote Functions inoperative after SSPC6 repair. Connected Vehicle Remote Functions inoperative on vehicles built March 20, 2021 and later.
SA-045-21b2021-09-03. Service bulletin. EQUIPMENT:ELECTRICAL; ENGINE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Connected vehicle remote functions inoperative and/or engine no start due to low battery voltage. Some customers may experience the following symptoms: Connected Vehicle Remote Functions inoperative after SSPC6 repair. Connected Vehicle Remote Functions inoperative on vehicles built July 1, 2021 and later.
SA-045-21a2021-09-03. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE; EQUIPMENT:ELECTRICAL. Connected vehicle remote functions inoperative and/or engine no start due to low battery voltage. Some customers may experience the following symptoms: Connected Vehicle Remote Functions inoperative after SSPC6 repair. Connected Vehicle Remote Functions inoperative on vehicles built July 1, 2021 and later.
01-006-21-3779a2021-09-03. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE AND ENGINE COOLING. This service bulletin provides testing and charging procedures in order to promote proper battery maintenance, to deliver new vehicles with fully charged batteries, and to reduce unnecessary battery replacement cost. For new vehicles in stock at the dealer, inspect and maintain the battery periodically according to the repair procedure.
SA-045-212021-08-03. Service bulletin. ELECTRICAL SYSTEM. Some customers may experience the following symptoms: Connected Vehicle Remote Functions inoperative after SSPC6 repair. Connected Vehicle Remote Functions inoperative on vehicles built July 1, 2021 and later. Engine no start due to low battery voltage.
SA-004-21b2021-07-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to activate the new TCU after replacement. Use the information in this service alert to initialize the new TCU until the procedure on MGSS is updated. CAUTION: If TCU activation is not performed, connected vehicle functions will not operate. This will have a negative impact on the customer because they will need to return to the dealer for repairs.
SA-029-21a2021-07-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. APPLE CARPLAY / ANDRID AURO FREQUENTLY ASKED QUESTIONS (FAQ) The following vehicles are not equipped with Apple CarPlay / Android Auto, but it can be activated using MDARS. See Activation instructions on MGSS -> Infotainment -> MAZDA CONNECT Updates -> Apple Carplay / Android Auto MDARS Activation Instructions
SA-039-212021-07-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. Some customer may experience all of the following when turning the ignition ON under hot weather conditions such as parking under the hot sun for some period of time: i-ACTIVSENSE warning light ON (1), Smart Brake Support (SBS) indicator light ON (2), "Excessive Camera Temp. Drive Safely" or "Safety and Driver Support Systems Temporarily Disabled" warning messages, DTC B14F9:00 stored in memory, DTC B14F9:00 cannot be found on MGSS, therefore repair cannot be performed.
09-012-21-3801a2021-06-29. Service bulletin. ELECTRICAL SYSTEM; LATCHES/LOCKS/LINKAGES; ENGINE AND ENGINE COOLING. Some customers may experience all of following symptoms: The door lock/unlock operation will not work using the remote transmitter button. The door lock/unlock operation will not work using the door lock/release touch sensor. The engine will not start using the ignition switch. This is caused when excess load is applied to the remote transmitter and the electrical terminals in it may be deformed, causing poor contact with the battery. To eliminate this concern, the structure in the remote transmitter has been modified to reduce the deformation of the electrical terminals.
SA-035-212021-06-02. Service bulletin. ELECTRICAL SYSTEM. A customer may experience symptoms caused by a roof water leak. Some will be obvious, like water in the spare tire well, others might be electrical in nature or water in the rear differential. The source of the leak may be pinhole anywhere along the roof seams under the 2 trim strips (where the roof rails attach). Depending on the location of the leak, the headliner may or may not be visibly affected.
SA-004-21a2021-06-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to activate the new TCU after replacement. Use the information in this service alert to initialize the new TCU until the procedure on MGSS is updated. CAUTION: If TCU activation is not performed, connected vehicle functions will not operate. This will have a negative impact on the customer because they will need to return to the dealer for repairs.
MT-002-212021-06-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. When programming a key or installing a Genuine Mazda Accessory Remote Engine Start system, you may encounter programming difficulty. This may be caused by a customer installed aftermarket decorative trim and/or cover on the START/STOP ENGINE button. The aftermarket accessory may create electrical interference, which may interfere with programming.
MT-001-212021-06-01. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT. If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal Workshop Manual diagnosis. Aftermarket devices may be the cause of the electrical concern. Ask the customer if any aftermarket devices have been installed.
09-013-21-38062021-06-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Be advised that TSB 09-013/21 is no longer valid and has been superseded to "(SSPC4 - 2020-2021 CX-30 - LOUD STATIC NOISE FROM SPEAKERS (WITH BOSE AUDIO))."
SA-013-21d2021-05-04. Service bulletin. ELECTRICAL SYSTEM. IMPORTANT NOTE: Some 2020 Mazda3 vehicles may have incorrect infotainment software version 10042 installed. The incorrect software will cause MyMazda App Connected Vehicle enrollment errors. Go to SSPC1. Some customers may complain about any of the following: Infotainment Center Display does not provide the Authorization Code during the MyMazda App Connected Vehicle enrollment (and Software Update Error message on 2020 Mazda3 only). Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF
09-012-21-38012021-05-04. Service bulletin. ELECTRICAL SYSTEM. Some customers may experience all of following symptoms: The door lock/unlock operation will not work using the remote transmitter button. The door lock/unlock operation will not work using the door lock/release touch sensor. The engine will not start using the ignition switch. This is caused when excess load is applied to the remote transmitter and the electrical terminals in it may be deformed, causing poor contact with the battery. To eliminate this concern, the structure in the remote transmitter has been modified to reduce the deformation of the electrical terminals.
SA-022-212021-04-06. Service bulletin. ELECTRICAL SYSTEM:ADAS:HUD:CAMERA/SENSOR; EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY. When performing the MGSS Workshop Manual 360° View Monitor System Aiming Procedure, M-MDS may show error message "Procedure unsuccessful". This may be caused by light glare on the SST.
SA-020-212021-04-05. Service bulletin. ELECTRICAL SYSTEM. Key Transmitter Power Saving Function: When the key transmitter Power Saving Function is turned ON, transmitter battery power consumption is restricted, thereby extending the transmitter battery life.
SA-005-21c2021-04-05. Service bulletin. ELECTRICAL SYSTEM. Some vehicles may have a "Low Battery Risk. Start Vehicle to Charge 12V Battery" warning message in the instrument cluster and a 30 second alarm sound. This is caused by the vehicle's electrical control area network (CAN) entering "Sleep Mode" when the network awake time reaches 30 cumulative minutes without the engine running.
MT-001-212021-04-05. Service bulletin. ELECTRICAL SYSTEM. If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal Workshop Manual diagnosis. Aftermarket devices may be the cause of the electrical concern. Ask the customer if any aftermarket devices have been installed.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.