# Service bulletin SSM 54479

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: 11027613
- Published by NHTSA: 2026\-01\-14
- Manufacturer's number: SSM 54479
- Manufacturer's date: 2026\-01\-07
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: audio system

## NHTSA's summary

Some 2025 Bronco vehicles equipped with a 7 speaker audio system \(minor feature code IDBAL\) may exhibit diagnostic trouble codes \(DTCs\) B128A:01, B128A:11, B128A:12, B128A:13, B1288:11, B1288:12 and/or B1238:17 stored in the audio front control module \(ACM\). To confirm a vehicle is built with a certain minor feature code, review the build information by clicking "Additional Information" under Vehicle ID Tab \> Vehicle Information, or double\-clicking the vehicle identification number \(VIN\) in the upper left corner on Professional Technician System \(PTS\). Clear the DTCs and if the DTCs return with no customer facing symptoms, this condition may be due to the ACM software. Replacement of the ACM and/or speakers will not resolve this condition. Inform the customers that they can continue to drive the vehicle and engineering is currently working on a solution for this condition that is expected in Q2 2026. Continue to monitor PTS for additional information and schedule service appointments for customers once the repair becomes available.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027613-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027613-9999.pdf)

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

## Trouble codes named

B1238, B1288, B128A

## Vehicles listed

- 2025 FORD BRONCO

JSON: [/v1/bulletins/11027613](/v1/bulletins/11027613)

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