Mazda bulletin SA-040-24
What it saysSome customer may experience any of the following: Multiple Warning Lights On Infotainment center display blank Engine no start unless the key transmitter is placed near the start button Interior lights do not… NHTSA’s full summary ↓
Mazda filed this with NHTSA as a service bulletin dated Sep 12, 2024, received Oct 4, 2024, about the engine. It names 3 model years (2024–2025). 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 communicationSome customer may experience any of the following: Multiple Warning Lights On • Infotainment center display blank • Engine no start unless the key transmitter is placed near the start button • Interior lights do not illuminate • DTC P2507:00 - PCM, PCM POWER SYSTEM: (LOW INPUT) stored. • DTC U0156:00 - PCM, CAN communication system, Communication error with CMU (Connectivity Master Unit).
Trouble codes it names: P2507 U0156
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SA-040-24 | Service bulletin | Sep 12, 2024 | 11008420 | PDF, 878 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 3 model years this bulletin names have filed 534 complaints with NHTSA since 2015. 167 of them name Engine, Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
I own a 2026 Mazda CX-90 hybrid with approximately 13,000 miles. The vehicle began making a grinding noise while driving, which has progressively worsened over time. It has since developed a hard knocking noise accompanied by noticeable vibration when the vehicle shifts gears. This knocking occurs during normal in-town driving.
2025 Mazda CX-90 · Engine · filed with NHTSA Jul 14, 2026
Vehicle is in normal mode with EV mode engaged, car is going 70mph and suddenly accelerator stops working and decelerates to ~60mph until vehicle suddenly aggressively switches to gas mode and accelerates again
2024 Mazda CX-90 · Engine · filed with NHTSA Jan 30, 2024
After starting the vehicle and driving it for a short distance, I forgot to disable the engine start/stop function. When the engine shut down, I pressed the button to disable it as I loathe this feature.
2025 Mazda CX-70 · Engine · filed with NHTSA Aug 9, 2025
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 engine
Source: same model, same component group52 other manufacturer communications filed against these Mazda models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Mazda list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SA-061-26 | Service bulletin | Sep 17, 2026 | DESCRIPTION Use this guide before ordering or replacing an AT component on applicable H3T vehicles. QUICK CHECKLIST BEFORE ORDERING Confirm… |
| SA-059-26 | Service bulletin | Sep 10, 2026 | 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… |
| SA-058-26 | Service bulletin | Aug 26, 2026 | This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-001/25 10/16/25, 05/15/25, 04/17/25… |
| 01-002-26a | Service bulletin | Jun 12, 2026 | This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red. 01-002/26 01/07/26 DESCRIPTION Some v… |
| SA-026-26 | Service bulletin | Apr 16, 2026 | This Service Alert supersedes the previously issued M-Tip(s) listed below. The changes are noted in Red text. MT-002/19 09/30/19 and 12/19/1… |
| MSP66 | Service campaign | Apr 15, 2026 | Subject: Mazda Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybr… |
| SA-014-26 | Service bulletin | Mar 11, 2026 | This Service Alert supersedes the previously issued SA(s) and TSB(s) listed below: The changes are noted in Red. SA-035/24 05/31/24 DESCRIPT… |
| 01-005-26 | Service bulletin | Feb 26, 2026 | Some vehicles may exhibit green residue (yellow circle) on the outer surface of the coolant reserve tank, which appears to be coolant blowba… |
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-040-24 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-040-24 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-040-24 cover?
The manufacturer filed it against 3 model years: 2025 Mazda CX-70, 2025 Mazda CX-90, 2024 Mazda CX-90. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.