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Service bulletin SM1606 Service M

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 id10184373
Published by NHTSA2020-12-21
Manufacturer's numberSM1606 Service M
Manufacturer's date2016-10-02
NHTSA componentENGINE

NHTSA's summary

When accelerating the bus will feel like it is "speed-limited" at some point and will feel like it is losing power and speed will dip to 20-25 mph. At no time will the bus shutdown completely

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

Engine

Vehicles listed
BLUE BIRD BLUE BIRD

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