# Service bulletin WI21\-012

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: 10191048
- Published by NHTSA: 2021\-05\-01
- Manufacturer's number: WI21\-012
- Manufacturer's date: 2021\-04\-26
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Warranty Information Letter for Detroit Parts Return Guidelines. Service locations are requested to review the letter's notes to ensure onsite parts management practices match to ease the return process for the service.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10191048-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10191048-9999.pdf)

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

## Components

Engine

## Vehicles listed

- FCCC FCCC
- FREIGHTLINER FREIGHTLINER
- STERLING STERLING
- THOMAS BUILT BUSES THOMAS BUILT BUSES
- WESTERN STAR WESTERN STAR

JSON: [/v1/bulletins/10191048](/v1/bulletins/10191048)

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