# Service bulletin 15\-005\-21\-3851

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10206010
- Published by NHTSA: 2022\-01\-06
- Manufacturer's number: 15\-005\-21\-3851
- Manufacturer's date: 2021\-12\-15
- NHTSA component: SERVICE BRAKES, HYDRAULIC; EQUIPMENT ADAPTIVE/MOBILITY; FORWARD COLLISION AVOIDANCE

## NHTSA's summary

Unexpected Smart Brake Support \(SBS\-R\) Operation Wile Reversing: Some customers may complain about unexpected collision warning or automatic braking while reversing under certain conditions such as a step or object on the road behind the vehicle. This is caused by the control software of the parking assist unit of the Smart Brake Support \(SBS\-R\) unintentionally detecting under certain conditions. To eliminate this concern, the control software of the parking assist unit has been modified. Customers having this concern should have their vehicle repaired using the following repair procedure.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10206010-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10206010-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes, Driver assistance, Equipment and accessories

## Vehicles listed

- 2022 MAZDA MX\-30 PHEV

## Other bulletins for the same vehicles and component

- [SA\-029\-26](/bulletins/11032103.md), 2026-05-05, Service bulletin: UNKNOWN OR OTHER; ENGINE; POWER TRAIN; SERVICE BRAKES. 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 DESCRIPTION Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle\-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers. SCHEDULED MAINTENANCE Refer to the applicable Workshop Manual or Owner's Manual for vehicle \-specific manufacturer scheduled maintenance. Workshop Manual \- Refer to section 00\-00 SCHEDULED MAINTENANCE. Owner's Manual \- Refer to section 8 Maintenance and Care. b. Note: Please refer to the information below outlining the services not included in Mazda's Factory Scheduled Maintenance: IMPORTANT: Recommending fluid flushes when not necessary can lead to customer confusion and dissatisfaction. Fluid flushing for preventive maintenance purposes is strongly discouraged, unless otherwise specified in a published procedure \(Owner’s Manual, Workshop Manual, Technical Service Bulletin, etc.\).
- [04\-003\-25a](/bulletins/11026903.md), 2026-01-03, Service bulletin: SERVICE BRAKES. 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 \(10,000 km\), and may require replacement at less than 12,400 miles \(20,000 km\). This is caused by intrusion of dirt and sand into the gap between the pad and the rotor. To eliminate this concern, the shape of the dust cover has been changed, and the brake pad chamfer shape has been revised.
- [SA\-055\-25](/bulletins/11026353.md), 2025-12-05, Service bulletin: SERVICE BRAKES. Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to the following information to understand why symptoms may occur, and to better assist the customer in resolving their specific brake concern. NOTE: Before following this Service Alert repair procedure, ensure published TSBs in MGSS have been completed per model year.
- [04\-003\-25](/bulletins/11024833.md), 2025-11-04, Service bulletin: SERVICE BRAKES. 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 \(10,000 km\), and may require replacement at less than 12,400 miles \(20,000 km\). This is caused by intrusion of dirt and sand into the gap between the pad and the rotor. To eliminate this concern, the shape of the dust cover has been changed.
- [09\-026\-25](/bulletins/11019989.md), 2025-07-01, Service bulletin: BACK OVER PREVENTION: WARNINGS; ELECTRICAL SYSTEM. Some customers may complain that the parking sensor alarm fails to sound until the vehicle is extremely close to an obstacle. This is due to improper PAU \(Parking Assist Unit\) control software. To eliminate this concern, the PAU control software has been modified.
- [SA\-016\-24c](/bulletins/11009644.md), 2024-11-04, Service bulletin: SERVICE BRAKES. Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to the following information to understand why symptoms may occur, and to better assist the customer in resolving their specific brake concern.
- [SA\-007\-24b](/bulletins/11008430.md), 2024-10-04, Service bulletin: SERVICE BRAKES. This 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.
- [04\-001\-24b](/bulletins/11008429.md), 2024-10-04, Service bulletin: SERVICE BRAKES. Symptom 1: Some customers may complain about hearing a grinding noise and/or vibration occur when applying the brake. This is due to rust on the rear brake disc plate. The brake pad has insufficient disc\-rust prevention performance, resulting in the disc plate rusting. To eliminate this concern, the pad material has been improved to prevent rust on the disc surface. Symptom 2: Some vehicles may exhibit a squeal noise from the rear brakes when braking lightly while driving at a slow speed. The squeal noise is caused by the disc pad surface fluctuating. To eliminate this concern, the brake pads have been modified.
- [SA\-016\-24b](/bulletins/11007009.md), 2024-09-04, Service bulletin: SERVICE BRAKES. Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to the following information to understand why symptoms may occur, and to better assist the customer in resolving their specific brake concern.
- [04\-001\-24a](/bulletins/11006982.md), 2024-09-04, Service bulletin: SERVICE BRAKES. Symptom 1: Some customers may complain about hearing a grinding noise and/or vibration occur when applying the brake. This is due to rust on the rear brake disc plate. The brake pad has insufficient disc\-rust prevention performance, resulting in the disc plate rusting. To eliminate this concern, the pad material has been improved to prevent rust on the disc surface. Symptom 2: Some vehicles may exhibit a squeal noise from the rear brakes when braking lightly while driving at a slow speed. The squeal noise is caused by the disc pad surface fluctuating.

JSON: [/v1/bulletins/10206010](/v1/bulletins/10206010)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2015-005-21-3851&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10206010&vehicle=Service%20bulletin%2015-005-21-3851)