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Service bulletin SC-20-162

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 id11013756
Published by NHTSA2025-02-05
Manufacturer's numberSC-20-162
Manufacturer's date2021-06-01
Campaign id or software versionSC-20-162
NHTSA componentSTRUCTURE:BODY

NHTSA's summary

Transit bus repair to the aux heat coolant tubes that run under the rear door have seen corrosion. The repair instruction requires accessing a metal plate under the fiberglass and pulling out the old tubes and installing tubes with oxidation protective measures.

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

Body and frame

Vehicles listed
PROTERRA CATALYST2018 to 2019
PROTERRA ZX52019

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