# Service bulletin CMI\-031821\-C

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: 10190746
- Published by NHTSA: 2021\-04\-26
- Manufacturer's number: CMI\-031821\-C
- Manufacturer's date: 2021\-03\-18
- NHTSA component: SERVICE BRAKES

## NHTSA's summary

This is a representative communication from the Cummins producing plant to affected vehicle manfacturers regarding a potential issue with water intrusion in oil pressure switches causing corrosion and presenting a fault code on certain B6.7 engines. The engine plant pursued corrective action with affected OEMs at their facilities.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190746-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190746-9999.pdf)

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

## Components

Brakes

## Vehicles listed

- CUMMINS B6.7

JSON: [/v1/bulletins/10190746](/v1/bulletins/10190746)

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