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Service bulletins for the 2025 Mazda CX-70

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.

297 on file from NHTSA, as of 2026-10-19.

About B1A03 on the 2025 Mazda CX-70: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: B1A03 are shown. Show all

Bulletins, newest first
09-002-24c2024-08-02. Service bulletin. SEAT BELTS. Some customers may complain that the warning sound in the passenger compartment (notifies i-ACTIVSENSE warnings, seat belt warning etc.) is too loud. Some of the volume settings in the notification and warning amplifier are not properly set. The control software of the notification and warning amplifier has been modified to eliminate this concern. CX-70 / CX-90 NOTE: This repair is also applicable for a "WARNING MESSAGE FOR AVAS MALFUNCTION WITH DTC B1A03:2B" concern.
09-002-24b2024-07-05. Service bulletin. SEAT BELTS. Some customers may complain that the warning sound in the passenger compartment (notifies i-ACTIVSENSE warnings, seat belt warning etc.) is too loud. Some of the volume settings in the notification and warning amplifier are not properly set. The control software of the notification and warning amplifier has been modified to eliminate this concern. CX-70 / CX-90 NOTE: This repair is also applicable for a "WARNING MESSAGE FOR AVAS MALFUNCTION WITH DTC B1A03:2B" concern.
09-028-24a2024-07-04. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM. Some customers may experience a warning message for the approaching vehicle audible system (AVAS) right after the ignition is turned on (POWER ON) while a loud noise, such as a horn, occurs close to the vehicle. Upon inspection, DTC B1A03:2B [ISB_AMP] (AVAS device circuit malfunction) is stored in memory. This may be caused by an internal initial diagnosis in the notification and warning amplifier detecting a false malfunction under this particular situation. To eliminate this concern, the control software of the notification and warning amplifier has been modified.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.