Mazda bulletin SA-077-24
What it saysThe CX-50 Hybrid has new and revised features that are different from previous models, and may be difficult to understand. NHTSA’s full summary ↓
Mazda filed this with NHTSA as a service bulletin dated Oct 24, 2024, received Nov 4, 2024, about the power train. It names 1 model year (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 communicationCX-50 Hybrid service cautions. The CX-50 Hybrid has new and revised features that are different from previous models, and may be difficult to understand. This Service Alert provides valuable information to support potential dealer and customer concerns.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SA-077-24 | Service bulletin | Oct 24, 2024 | 11009651 | PDF, 3,892 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| B4YL-61-K39 | — | — | eBay Motors → |
Read by machine from the document NHTSA serves (20 pages), read Sep 30, 2026. A part number is shown only where it matches Mazda’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 47 complaints with NHTSA since 2015. 11 of them name Power Train — 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 am reporting a potential safety-related defect in my 2025 Mazda CX-50 Preferred, which is approximately four months old. On one occasion, the vehicle moved backward while in Drive mode. This occurred twice on the same day under similar conditions on a slight incline.
2025 Mazda CX-50 · Power Train · filed with NHTSA Mar 29, 2026
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 power train
Source: same model, same component group8 other manufacturer communications filed against the Mazda CX-50 under the same component group (power train), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 01-003-26a | Service bulletin | May 1, 2026 | This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red text. 01-003/26 01/30/26 Some vehicl… |
| SA-029-26 | Service bulletin | Apr 21, 2026 | This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA-011/24 02/12/24, 06/06/24, 07/29/24 DE… |
| 30-001-26b | Service bulletin | Apr 10, 2026 | HYBRID SYSTEM FAILURE DISPLAYED ON METER WITH DTC P2530:12 This bulletin supersedes the previously issued bulletin(s) listed below. The chan… |
| SA-056-25 | Service bulletin | Nov 27, 2025 | When inspected, the differential or PTO oil is dark or black. This is considered normal and NO repair should be performed. During production… |
| PF-24-11 | Other | Oct 29, 2024 | Beginning with the 2025 model year and onwards, the CX-50 Turbo Models equipped with the Tow Package feature a modified harness connector… |
| SA-052-24 | Service bulletin | Aug 7, 2024 | Some customer's might state that they notice fluid or oil leaking/dripping on the ground when the vehicle is parked. For this concern, inspe… |
| PF-24-03 | Service bulletin | Mar 6, 2024 | Due to limitations, certain vehicles from 2016 to current models might display an inaccurate transmission part number in the Global Electron… |
| 05-001-23 | Service bulletin | May 3, 2023 | Some customers may experience a shock during driving at low speeds when starting from a stop with the accelerator pedal depressed slightly.… |
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-077-24 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-077-24 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-077-24 cover?
The manufacturer filed it against 1 model year: 2025 Mazda CX-50. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.