Mazda bulletin SA-049-26
What it saysDESCRIPTION For CX-70 PHEV (SC) models, the SC specification includes ECU modifications to extend electric driving range. NHTSA’s full summary ↓
Mazda filed this with NHTSA as a service bulletin dated Aug 6, 2026, received Sep 4, 2026, about the electrical system. It names 1 model year (2026). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationDESCRIPTION For CX-70 PHEV (SC) models, the SC specification includes ECU modifications to extend electric driving range. The BECM (Battery Energy Control Module) inside the high-voltage battery pack must be maintained at C-level or later. REPAIR PROCEDURE When replacing the high-voltage (HV) battery pack, verify the BECM software level. If the level is earlier than C-level, update it to C-level or later and execute configuration after completing the update. 1. Reprogram the BECM with the Mazda Modular Diagnostic System (M-MDS), using Mazda Diagnostic And Repair Software (MDARS). Refer to MDARS ECU Reprogramming Procedure.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SA-049-26 | Service bulletin | Aug 6, 2026 | 11037007 | PDF, 119 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 3 complaints with NHTSA since 2015.
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the electrical system
Source: same model, same component group78 other manufacturer communications filed against the Mazda CX-70 under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Mazda list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 09-027-26 | Service bulletin | Sep 29, 2026 | DESCRIPTION Some CX-70 and CX-90 PHEV vehicles may fail to start (enter READY mode) in cold weather, but the vehicle can often be started su… |
| SA-012-26d | Service bulletin | Sep 18, 2026 | DESCRIPTION Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional sym… |
| SA-038-26b | Service bulletin | Sep 10, 2026 | 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… |
| SA-053-26 | Service bulletin | Aug 19, 2026 | This Service Alert supersedes the previously issued bulletin(s) listed below. The changes are noted in Red text. SA-006/23 01/23/23 DESCRI… |
| SA-039-26a | Service bulletin | Aug 19, 2026 | This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red text. SA-039/26 06/15/26 Mazda Connect… |
| SA-051-26 | Service bulletin | Aug 15, 2026 | This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-076/24 10/22/24 DESCRIPTION This Se… |
| SA-050-26 | Service bulletin | Aug 7, 2026 | DESCRIPTION Some vehicles may continue to display the recall notification "IMPORTANT NOTICE. VIEW VEHICLE STATUS MONITOR FOR DETAILS" on the… |
| SA-012-26c | Service bulletin | Aug 7, 2026 | This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-012/26 04/17/26, 03/04/26 and 02/2… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Mazda, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mazda SA-049-26 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the SA-049-26 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does SA-049-26 cover?
The manufacturer filed it against 1 model year: 2026 Mazda CX-70. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.