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Service bulletin HSB020521

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 id10186780
Published by NHTSA2021-02-05
Manufacturer's numberHSB020521
Manufacturer's date2021-02-05
NHTSA componentEQUIPMENT; ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SOFTWARE

NHTSA's summary

Code of Federal Regulations Title 49 Part 579.5 Notices, Bulletins, customer satisfaction campaigns, and other communications January 2021.

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

Driver assistance, Electrical system, Equipment and accessories, Blind spot detection

Vehicles listed
AEV FREIGHTLINER M2 AMBULANCE2021
AEV TRAUMAHAWK2020 to 2021
AEV TYPE 1 F-SERIES AMBULANCE2020
HORTON TYPE I2020

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