# Service bulletin SA\-038\-26a

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.

- Type: Service bulletin
- NHTSA id: 11037018
- Published by NHTSA: 2026\-09\-04
- Manufacturer's number: SA\-038\-26a
- Manufacturer's date: 2026\-09\-04
- NHTSA component: UNKNOWN OR OTHER; ELECTRICAL SYSTEM; ENGINE; EXTERIOR LIGHTING
- Manufacturer's system: Connected Vehicle System

## NHTSA's summary

This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA\-038/26 06/15/26 DESCRIPTION Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code \(OTP\) during the MyMazda App Connected Vehicle enrollment. 2. Remote functions inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ". Index MAZDA CONNECT 2 Center Display Status Icon MAZDA CONNECT 3 Center Display Status Icon Remote Engine Start Will Not Function Remote Engine Start Function Will turn engine OFF Customer Subscription Status TCU Communication Line Status

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037018-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037018-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine, Lighting

## Vehicles listed

- 2020 to 2026 MAZDA CX\-30
- 2021 to 2026 MAZDA CX\-5
- 2023 to 2026 MAZDA CX\-50
- 2025 to 2026 MAZDA CX\-50 HYBRID
- 2025 to 2026 MAZDA CX\-70
- 2025 to 2026 MAZDA CX\-70 PLUG\-IN HYBRID
- 2021 to 2023 MAZDA CX\-9
- 2024 to 2026 MAZDA CX\-90
- 2024 to 2026 MAZDA CX\-90 PLUG\-IN HYBRID
- 2019 to 2026 MAZDA MAZDA3
- 2022 to 2023 MAZDA MX\-30
- 2024 to 2026 MAZDA MX\-5

## Recalls for the same vehicles and component

- [25V568000](/recalls/nhtsa/25V568000.md), 2025-09-02: ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE:FUEL LEVEL FLOAT/SENSOR/SENDING UNIT; ELECTRICAL SYSTEM:BODY CONTROL MODULE:SOFTWARE
- [25V418000](/recalls/nhtsa/25V418000.md), 2025-06-18: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE \(HPCU\):SOFTWARE
- [2025275](/recalls/tc/2025275.md), 2025-05-22: Lights And Instruments
- [2024659](/recalls/tc/2024659.md), 2024-10-31: Electrical
- [2024657](/recalls/tc/2024657.md), 2024-10-31: Engine
- [24V817000](/recalls/nhtsa/24V817000.md), 2024-10-31: ELECTRICAL SYSTEM:PROPULSION SYSTEM:INVERTER; ELECTRICAL SYSTEM:SOFTWARE
- [24V816000](/recalls/nhtsa/24V816000.md), 2024-10-31: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:MANAGEMENT SYSTEM/ENERGY CONTROL MODULE \(BMS/BECM\):SOFTWARE
- [24V815000](/recalls/nhtsa/24V815000.md), 2024-10-31: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\)
- [24V814000](/recalls/nhtsa/24V814000.md), 2024-10-31: STRUCTURE:INTERIOR PANELS:DASHBOARD; ELECTRICAL SYSTEM:SOFTWARE
- [24V649000](/recalls/nhtsa/24V649000.md), 2024-09-03: LANE DEPARTURE: SENSING SYSTEM: CAMERA; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; EXTERIOR LIGHTING:HEADLIGHTS

## Other bulletins for the same vehicles and component

- [SA\-042\-26a](/bulletins/11037900.md), 2026-10-03, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. Mazda Connected Services \- Frequently Asked Questions \(FAQ\) This Service Alert supersedes the previously issued SAs listed below. The changes are noted in Red text. SA\-042/26 06/30/26 DESCRIPTION Frequently Asked Questions \(FAQ\) Index General Questions MAZDA CONNECT Indication Setup and Getting Started Dealer Processes Registration / Enrollment / Take\-Over Customer Subscription Status WI\-FI General Informatio Opening the TCU Communication Line WI\-FI How\-To Conditions for Remote Engine Start Will Not Function WI\-FI Trial Period Conditions for Remote Engine Start Function Will turn engine OFF Interacting With The App TCU Communication Line Status Service Issues Educational Videos Troubleshooting Resources MyMazda App Error Codes Customer Opt\-Out
- [SA\-041\-26a](/bulletins/11037899.md), 2026-10-03, Service bulletin: ELECTRICAL SYSTEM. DESCRIPTION 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 MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices. Examples: 1. Devices connected to the DLC\-2 \(battery discharge/DTC stored\) 2. Devices plugged into the 12V outlet 3. GPS tracking device \(engine no start/battery discharge\) 4. Dash cam \(DTC stored\) 5. Non\-certified USB cable \(Apple Carplay™/ Android Auto™ will not connect\) 6. Over\-sized wheels/tires \(incorrect GPS location\) 7. DTC C0023:14 8. Decorative trim and/or cover on the START/STOP ENGINE button
- [SSPE2 Owner Ltr](/bulletins/11037897.md), 2026-10-03, Over\-the\-air update: ELECTRICAL SYSTEM. Subject: Announcement of Special Service Program \(SSPE2\) Ethernet Communication – Over The Air \(OTA\) Update Concerns and Manufacturer Service Program \(MSP67 \) – Battery Depletion \- 2026MY CX\-5 vehicles URGENT \- STOP DELIVERY OF AFFECTED VEHICLES: MAZDA SALES AND SERVICE TEAMS \- ACTION ITEM: Between both campaigns there are approximately 27,565 vehicles \(for both campaigns\) in stock at U.S. Mazda dealers. All Mazda dealers must quarantine any affected New, Used or Certified Pre\-Owned in\-stock vehicles until the repair is completed. The affected dealer inventory list will be available to each District Service Manager with the notification of this dealer email. Once completed, the vehicle can be delivered, and the Warranty claim can be submitted later without penalty since the vehicle has been repaired. Mazda Motor Corporation has decided to conduct two service programs Special Service Program \(SSP\) and Manufacturer Service Program \(MSP\) on certain 2026MY CX \-5 vehicles sold in the U.S. and U.S. Territories. Vehicles also produced by Mazda Motor de Mexico \(MMdM\) and Mazda Canada Inc. \(MCI\) are affected and should be repaired if presented to your dealership. Please see the description, model, model year, and VIN ranges below for all vehicles in these two campaigns. There are 70,225 vehicles affected by SSPE2 and 53,653 vehicles affected by MSP67. All vehicles in MSP67 are also affected by campaign SSPE2. Please read this complete letter for all the repair information . Special Service Program SSPE2 – Ethernet Communication and OTA Update Concerns \- SSPE2 addresses two concerns: 1\) Ethernet communication \(CDC \-DCM communication\) concern: Communication in the Cockpit Domain Controller \(CDC\) and Data Communication Module \(DCM\), may be interrupted, making the connected services unavailable. The interruption may cause the master warning light to illuminate and audible warning from the emergency call speaker. 2\) OTA software update concern: Due to an improper communication control program in the CDC and DCM, may prevent OTA software updates to be completed. In addition, if an OTA software update is successfully completed, the vehicle's software configuration status may not be correctly transmitted to the server, which may prevent notification of subsequent software update successfully completed OTA software updates may not properly sync with Mazda’s servers potentially preventing future OTA updates. Repair Outline: Reprogram the DCM and CDC software, using a USB memory stick with modified software. Manufacturer Service Program MSP67 \- Battery Depletion Concern \- MSP67 addresses two concerns: On certain subject CX\-5 vehicles, the vehicle may fail to start due to battery depletion after IG OFF. 1\) Data Communication Module \(DCM\): Remote Diagnostics software may reset and fail to close a CAN communication channel after ignition OFF and the battery may drain over time. Note: Vehicles for Puerto Rico and Mexico markets are not affected by this factor as they are not equipped with the DCM. 2\) Body Control Module \(BCM\): The Body Control Module \(BCM\) may intermittently reset during sleep mode operation. Vehicles may cycle between wake\-up and sleep states, leading to battery depletion. Repair Outline: Reprogram the BCM software with M\-MDS, using Mazda Diagnostic and Repair Software II \(MDARS II\). The DCM software is being re\-programed by SSPE2. Note: When the BCM is reprogrammed, the Central Gateway \(CGW\) will also be updated automatically.
- [DRW59 Warr a](/bulletins/11037895.md), 2026-10-03, Service campaign: ENGINE. Subject: Notification of Dealer Re\-Work \(DRW59\) – 2026MY CX\-30 and 2026MY Mazda3 \- Check Engine Light On With DTC P0126:00 Dear Mazda Dealer Colleagues, Mazda Motor Corporation has decided to conduct a Dealer Re\-Work on certain 2026MY CX\-30 and Mazda3 vehicles. Concern Outline: On certain subject vehicles, the check engine light may illuminate with DTC P0126:00 \(Thermostat stuck open\) stored due to improper PCM control logic. Repair Outline: Reprogram the PCM with the Mazda Modular Diagnostic System \(M\-MDS\), using Mazda Diagnostic and Repair Software \(MDARS\) by following TSB 01\-006/26 repair instructions. ACTION ITEM \- STOP DELIVERY: All affected vehicles in inventory can be sold but not delivered until repaired. There are approximately 17,942 new vehicles in dealer stock and/or in transit to dealers. All affected dealer inventory types with this DRW must be repaired prior to delivery. The number of affected units at your dealership can be seen in Inventory \& Sales 2.0 in eMDCS and a VIN list \(via an internal MNAO campaign reporting\) will also be provided to your District Service Manager by 5pm \(Pacific Time\) on the date this dealer email is sent. Owner Notification: There is no Owner Notification with this or any Dealer Re\-Work. PARTS INFORMATION: There are no parts required for this repair.
- [SA\-061\-26](/bulletins/11037637.md), 2026-10-01, Service bulletin: ENGINE; POWER TRAIN. DESCRIPTION Use this guide before ordering or replacing an AT component on applicable H3T vehicles. QUICK CHECKLIST BEFORE ORDERING Confirm the vehicle is a CX\-90 \(KK\) or CX\-70 \(KJ\) with H3T and is within the applicable market coverage. • In GEPC, identify the AT component part number for the vehicle. • Use the GEPC lookup tables below to determine whether the vehicle requires Table A or Table B parts. • Order the complete set of parts listed in the applicable table. DO NOT order the AT component by itself. • Check whether water hose removal is required for that GEPC part number. • Follow the applicable WSM repair procedure for AT component removal/installation, water hose removal, and oil hose/oil pipe installation in MGSS. • IMPORTANT: If only the AT component is ordered, required replacement parts will be missing, and the repair cannot be completed.
- [SA\-060\-26](/bulletins/11037636.md), 2026-10-01, Service bulletin: ENGINE. NOTE: This service information only applies to vehicles with PYUKD engine and EGR. DESCRIPTION DTC P0402 EGR malfunctions may be falsely detected due to an internal malfunction of the MAP sensor. REPAIR PROCEDURE 1. Using MDARS, verify DTC P0402 is set in current or past history.
- [SA\-059\-26](/bulletins/11037635.md), 2026-10-01, Service bulletin: ENGINE. This Service Alert supersedes the previously issued SA\(s\) listed below. The changes are noted in Red. SA\-029/24 05/09/24 DESCRIPTION The CX\-90 and CX\-70 PHEV are equipped with two electric water pumps that look similar but have different part numbers. CAUTION: If the wrong water pump is ordered or they are reversed, DTC U019F could be set.
- [SA\-038\-26b](/bulletins/11037634.md), 2026-10-01, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA\-038/26 08/18/26 and 06/15/26 DESCRIPTION Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code \(OTP\) during the MyMazda App
- [SA\-015\-26e](/bulletins/11037633.md), 2026-10-01, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. This Service Alert supersedes the previously issued SA\(s\) listed below. The changes are noted in Red. SA\-015/26 05/27/26, 04/20/26, 04/09/26, 03/25/26 and 03/13/26 DESCRIPTION Index Intermittent Globe with a slash icon • Beep sound near the SOS button and SOS button amber or red LED • Instrument Cluster Master Warning Light illuminated • The center display screen is blank • No data plan message • DTC U2701:89 • DTC U0156:00 • Center Display Home Screen Partial Boot Up • No Connected Vehicle One Time Passcode \(OTP\) • During a Bluetooth® phone call, tapping the navigation icon does not launch Google Maps • During an Apple CarPlay phone call, the Climate Control full􀀀screen menu cannot be accessed • While the Climate Control screen is displayed in full screen, tapping the Apple CarPlay icon does not launch Apple CarPlay
- [SA\-012\-26d](/bulletins/11037632.md), 2026-10-01, Service bulletin: ELECTRICAL SYSTEM. DESCRIPTION Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode \(OTP\) may fail. Connected Vehicle Remote functions may fail. The following DTC's may be stored: B1252:87\-8B:TCU \- COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT \(CMU\) U0198:00\-03:CMU \- COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT REPAIR PROCEDURE 1. Verify the concern. 2. Check if any of the following DTCs are stored: B1252:87\-8B:TCU \- COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT \(CMU\) U0198:00\-03:CMU \- COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT Are the following DTCs stored? YES: Proceed to next step. NO: This service information does not apply. Continue troubleshooting using MGSS.

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