Mazda bulletin SA-077-23
What it saysThis information will give you the necessary knowledge to respond to customers concerns of Smart Brake Support (SBS) unintended braking. NHTSA’s full summary ↓
Mazda filed this with NHTSA as a service bulletin dated Nov 15, 2023, received Dec 5, 2023, about the service brakes. It names 16 model years (2019–2024). 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.
Get the next Mazda bulletin for your model by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis information will give you the necessary knowledge to respond to customers concerns of Smart Brake Support (SBS) unintended braking. By educating the customer on the system operation, it should reduce their anxiety or distrust of the vehicle.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SA-077-23 | Service bulletin | Nov 15, 2023 | 10246216 | PDF, 564 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.
Email me new Mazda bulletins for one of these models
A weekly email, sent only in a week when Mazda files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 16 model years this bulletin names have filed 1,000 complaints with NHTSA since 2015. 71 of them name Service Brakes — 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.
On the 2019 Mazda Mazda3, the 12 owners who gave an odometer reading for Service Brakes reported it at a median of 7,300 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
These issues been happening since the second month I owned my 2019 Mazda 3 hatchback. 1- suspensions, they're very rough & harsh., they bounce so much for no reason, I damaged one tire already while I was driving on i476 normal highway where I stepped on normal pothole ended up damaging my tire, suspensions are really dangers on all…
2019 Mazda Mazda3 · Service Brakes · filed with NHTSA May 24, 2020 · ODI 11325706
Driver of the vehicle was parking the vehicle in a parking lot, foot nowhere near the accelerator when the car suddenly surged forward striking a parking pole.. The driver side front quarter panel took on heavy damage along with the sensors.. Car had to be towed... It accelerated by itself
2024 Mazda CX-50 · Service Brakes · filed with NHTSA Jul 13, 2026 · ODI 11750004
The automatic braking engaged without warning and without cause. There was nothing directly in front of the car that was a possible collision threat. I suffered a neck injury as a result of the force in which the car stopped. Fortunately the driver behind me was able to stop.
2021 Mazda CX-30 · Service Brakes · filed with NHTSA Jul 24, 2022 · ODI 11475522
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 service brakes
Source: same model, same component group31 other manufacturer communications filed against these Mazda models under the same component group (service brakes), newest first. The eight newest are listed; the rest are on the Mazda list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| CSP14 | Warranty extension | Sep 24, 2026 | Dear Mazda Owner: You are receiving this notice because Mazda’s records indicate that you have a 2024-2026 Mazda CX-90 vehicle manufactured… |
| CSP14 CSP15 | Warranty extension | Sep 24, 2026 | Subject: Mazda Rear Brake Pad Customer Service Program Limited Warranty Extension – (CSP14 – CX-90 models) and (CSP15 – CX-70 models) Mazda… |
| 04-003-26a | Service bulletin | Jun 10, 2026 | This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red. 04-003/26 05/29/26 DESCRIPTION Some v… |
| 04-003-26 | Service bulletin | May 30, 2026 | Some vehicles may exhibit a squeaking noise from the rear brake during deceleration, and the noise is particularly noticeable during braking… |
| 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… |
| 04-001-26 | Service bulletin | Feb 11, 2026 | This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red. 04-001/25 02/06/25 Some vehicles may… |
| 09-003-26 | Service bulletin | Jan 13, 2026 | Some vehicles may exhibit a key-in lock situation when the speed-sensitive door lock activates unexpectedly while idling in the P-range. Thi… |
| 04-003-25a | Service bulletin | Dec 24, 2025 | Some vehicles may experience premature wear of the front inner brake pads. The pads wear down by about 0.1 in (3 mm) every 6200 miles… |
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-077-23 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-077-23 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. Every Mazda warranty extension on file lists the ones Mazda has filed.
Which vehicles does SA-077-23 cover?
The manufacturer filed it against 16 model years: 2024 Mazda CX-30, 2023 Mazda CX-30, 2022 Mazda CX-30, 2021 Mazda CX-30, 2020 Mazda CX-30, 2024 Mazda CX-50 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.