# Service bulletin SSM 52721

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: 11005745
- Published by NHTSA: 2024\-08\-06
- Manufacturer's number: SSM 52721
- Manufacturer's date: 2024\-07\-15
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

Some 2021 F\-150 vehicles equipped with an 8 speaker system \(minor feature code IDBAF\) may exhibit poor sound quality or distorted sound from all speakers. To confirm a vehicle is built with a certain minor feature code, review the build information by double\-clicking the vehicle identification number \(VIN\) in the upper left corner in the Professional Technician System \(PTS\). This may be due to a recent update delivered over\-the\-air \(OTA\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11005745-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11005745-9999.pdf)

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

## Vehicles listed

- 2021 FORD F\-150

JSON: [/v1/bulletins/11005745](/v1/bulletins/11005745)

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