All manufacturers of motor vehicles or motor vehicle equipment, including low volume and child restraints, must submit to NHTSA copies of their manufacturer communications sent to dealers, distributors, owners, purchasers, lessors, or lessees regarding any defect, failure or malfunction beyond normal deterioration in use, failure of performance, flaw or other unintended deviation from design specifications whether it is safety-related or not.
NHTSA ID Number: 11034450
TSB Date: 2026-07-03
Manufacturer Communication Number: B120626
Summary
In these vehicles with an S68 engine, an incorrect diagnosis of the Valvetronic (VVT) may occur. Undercertain operating conditions, the software may detect a short-circuit in the valve control system even thoughthere is no fault. When the above-mentioned fault occurs, the red Check Control warning
light ‘Drive system fault’ illuminates.This can result in the intake valves closing gradually, which may lead to misfires while the engine is running.
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Read More...NHTSA ID Number: 11034449
TSB Date: 2026-07-03
Manufacturer Communication Number: B120326
Summary
Due to an implementation error in various OBD diagnostics in the vehicle's control units, in very rare cases itmay happen that stored fault memory codes (DTCs) and the MIL (warning light) are not automaticallydeleted even though the underlying malfunction has already been rectified. This does not comply with the statutory OBD specifications.
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Read More...NHTSA ID Number: 11034448
TSB Date: 2026-07-03
Manufacturer Communication Number: SA-042-26
Summary
This Service Alert supersedes the previously issued SAs listed below. The changes are noted in Red text. SA-017/25 12/16/25, 09/08/25, 07/14/25, 05/15/25 and 03/21/25 DESCRIPTION Mazda Connect 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
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Read More...NHTSA ID Number: 11034447
TSB Date: 2026-07-03
Manufacturer Communication Number: SA-041-26
Summary
This SA supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-061/25 12/17/25 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 Example 1: Some electrical devices connected to the DLC-2 connector by insurance or mobile phone companies may cause: Battery discharge. The device may disrupt the CAN system battery saver mode. • IDS/MMDS will not communicate with the vehicle due to poor DLC-2 connection. The aftermarket device may cause DLC-2 female terminals to spread open.
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Read More...NHTSA ID Number: 11034444
TSB Date: 2026-07-03
Manufacturer Communication Number: SA-040-26
Summary
This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-009/25 08/22/25 and 02/18/25 DESCRIPTION Some customers may experience a Connected Vehicle failure. The MyMazda App may display an Error Code. This document provides Error Code description and recovery information to assist with repairs. Index System Outline • MYMAZDA App Connected Vehicle (CV) Error Codes • Vehicle Confirmation Instructions • Troubleshooting Instructions • Resources
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Read More...NHTSA ID Number: 11034443
TSB Date: 2026-07-03
Manufacturer Communication Number: SA-039-26
Summary
This Service Alert supersedes the previously issued SA listed below. The changes are noted in Red text. SA-012/25 10/06/25, 08/21/25, 05/15/25 and 02/27/25 DESCRIPTION Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure. REPAIR PROCEDURE NOTE: Before proceeding: Document the vehicle's current MAZDA CONNECT CMU software version. • 2019-2022 Models - Go to TSB 16-003/23 and confirm the CMU Serial Number is not within the affected range. • Document customer device Brand/Model/Model Number/software version on the repair order. • Confirm that the Connectivity Master Unit (CMU) is updated to the latest software version. Go to MGSS -> Infotainment -> MAZDA CONNECT Updates ○ • If possible, complete the Microsoft Forms Questionnaire. Go to MGSS -> Infotainment -> MAZDA CONNECT Questionnaire.
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Read More...NHTSA ID Number: 11034442
TSB Date: 2026-07-03
Manufacturer Communication Number: SSPE1 Repair a
Summary
Special Service Program (SSPE1) - 2026 CX-50 Hybrid – Battery Label Concern Mazda Motor Corporation has decided to conduct a Special Service Program (SSP) on certain 2026MY CX-50 vehicles produced from September 8, 2025 through September 26, 2025. If you receive this notice, your vehicle is included in this SSP. What is the problem? On certain CX-50 Hybrid vehicles, inappropriate battery labels were attached to the center pillar and the traction battery beneath the rear seat. QR codes printed on these labels are incorrect and do not link to the battery information website, the required information related to the vehicle’s hybrid battery cannot be displayed. This condition does not comply with Section 1962.6 (Battery Labeling Requirements), Title 13 of the California Code of Regulations. Although only the six states (California, Massachusetts, New York, Oregon, Vermont and Washington) have adopted the battery labeling requirements of Section 1962.6 starting with the 2026MY, Mazda is also implementing corrective action for vehicles in all other states. What will Mazda do? Your Mazda dealer will attach the correct battery labels to the center B-pillar and the hybrid battery, free of charge.
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Read More...NHTSA ID Number: 11034440
TSB Date: 2026-07-03
Manufacturer Communication Number: SA-037-26a
Summary
This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red text. SA-037/26 05/28/26 DESCRIPTION Replacement battery packs for High Voltage systems are supplied with an additional label that matches the one attached to the service battery pack (refer to the sample High Voltage Battery Label image for reference). When replacing the battery pack in a 2026 or later model that has a similar label at the base of the left B-pillar, replace the label with the new one included in the service parts battery pack. REPAIR PROCEDURE Label Application: When replacing a High Voltage Battery: refer to the Label Application Process included in the "HIGH VOLTAGE BATTERY REMOVAL/INSTALLATION" or "M Hybrid Boost BATTERY REMOVAL/INSTALLATION" procedures in the Workshop Manual for the applicable models.
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Read More...NHTSA ID Number: 11034439
TSB Date: 2026-07-03
Manufacturer Communication Number: SA-027-26a
Summary
This SA supersedes the previously issued bulletin(s) listed below. The changes are noted below in Red. SA-027/26 04/16/26 DESCRIPTION The Mazda DCA-8000 is required for all warranty battery testing. If the Mazda DCA-8000 is not used, incorrect battery testing may result in unnecessary battery replacement. Use the following test procedures in this Service Bulletin to test Mazda vehicle batteries and to generate a Warranty Code. NOTE: A Warranty Code is required for warranty claim submission Battery Identification (Mazda batteries have 2 rating types) 1. JIS (Japanese Industrial Standard): JIS codes are six-digit alpha-numeric markings (excluding i-STOP batteries e.g. Q-85, S-95) molded into the top of the battery to identify a battery by the capacity (amps), dimensions, and battery terminal type. Vehicles manufactured in Japan come from the factory with a JIS rated battery. NOTE: Replacement batteries may use a CCA rating. If so, use the CCA rating listed on the battery. REPAIR PROCEDURE 1. Perform appropriate repair to vehicle. If needed, use the Battery Diagnostics of the DCA-8000 to test the charging and starting systems by following the on-screen instructions for entering the appropriate information. Refer to the Mazda DCA-8000 Instruction Manual for more information.
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Read More...NHTSA ID Number: 11034438
TSB Date: 2026-07-03
Manufacturer Communication Number: SA-017-26c
Summary
This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-017/26 05/20/26 and 03/17/26 DESCRIPTION Some customers may experience an intermittent loss of the MyMazda App remote function. REPAIR PROCEDURE Refer to TSB 16-004/26. Did the TSB repair the customer's concern? YES: Repair is complete. • NO: Go to Recovery. • Recovery 1. Power down the vehicle and put into sleep mode (turn off the ignition, exit the vehicle, lock it, and wait at least 5 minutes). Is the concern resolved? YES: Repair complete. • NO: Proceed to the next step. • 2. Disconnect the 12V battery negative cable. Refer to NEGATIVE 12 V BATTERY TERMINAL DISCONNECTION/CONNECTION [PYU]. 3. Wait at least 10 minutes. 4. Reconnect the 12V battery and retest. NOTE: DO NOT attempt any repairs or component replacements at this time. • The vehicle may be returned to the customer. • Customer Communication Advise the customer that Mazda is aware of the condition and is currently working on a resolution. As soon as a resolution becomes available, this Service Alert will be
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Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
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Last update on 2026-06-30 / Affiliate links / Images from Amazon Product Advertising API
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Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
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