# Service bulletin 15\-001\-26

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: 11033118
- Published by NHTSA: 2026\-06\-02
- Manufacturer's number: 15\-001\-26
- Manufacturer's date: 2026\-05\-21
- NHTSA component: ELECTRICAL SYSTEM; LANE DEPARTURE: BLIND SPOT DETECTION

## NHTSA's summary

DESCRIPTION Some customers may experience that the BSM \(Blind Spot Monitoring\) warning light remains on while driving, even though no vehicle is present behind. This may be caused by electrical noise in the BSM control module power supply and vibration noise from the rear bumper that falsely detects a vehicle behind. To eliminate this concern, the control software of the BSM has been modified to prevent the influence of noise. Customers having this concern should have their vehicle repaired using the following repair procedure. REPAIR PROCEDURE 1. Verify the customer concern. NOTE: This issue may have two causes: the BSM software not at the latest version and the BSM insufficiently fastened. The issue may occur due to either one or both. Therefore, it is necessary to strictly follow the procedure outlined below. 2. Reprogram ECU with the Mazda Modular Diagnostic System \(M\-MDS\), using Mazda Diagnostic and Repair Software \(MDARS\). Refer to MDARS ECU Reprogramming Procedure. 3. Remove the rear bumper according to the instructions in MGSS \(REAR BUMPER REMOVAL/INSTALLATION\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033118-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033118-9999.pdf)

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

## Components

Driver assistance, Electrical system, Blind spot detection

## Vehicles listed

- 2025 to 2026 MAZDA CX\-70
- 2025 to 2026 MAZDA CX\-70 PLUG\-IN HYBRID

## Other bulletins for the same vehicles and component

- [SA\-020\-24b](/bulletins/11008419.md), 2024-10-04, Service bulletin: ELECTRICAL SYSTEM; LANE DEPARTURE: WARNING; ENGINE; LANE DEPARTURE: BLIND SPOT DETECTION; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. The CX\-70 and CX\-90 have 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.

JSON: [/v1/bulletins/11033118](/v1/bulletins/11033118)

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