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Service bulletin M1478

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10252810
Published by NHTSA2024-04-06
Manufacturer's numberM1478
Manufacturer's date2024-03-27
NHTSA componentEQUIPMENT; UNKNOWN OR OTHER

NHTSA's summary

SERVICE BULLETIN M1478 (REV B): AUDIO COMPONENTS - OUT OF WARRANTY PROCESS. PURPOSE: REVISION. This bulletin is to Inform dealers of the out of warranty repair process for select audio components. Any superseded parts will also be included. Refer to Table 2. This bulletin replaces P&A bulletins PAB912 and PAB1001. The components will be processed through United Radio. * Updated: Required Dealer Action. Fix "urdealerservices" link.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories

Vehicles listed
HARLEY-DAVIDSON HARLEY-DAVIDSON

Listing a model year does not mean every vehicle of it is concerned: the document says which.