# B1A03 on the 2025 Mazda CX\-70

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name B1A03

- [11005543](https://open.wenmarpro.com/bulletins/11005543), 2024-08-02: 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.
- [11003355](https://open.wenmarpro.com/bulletins/11003355), 2024-07-05: 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.
- [11003225](https://open.wenmarpro.com/bulletins/11003225), 2024-07-04: 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.