# Service bulletin TSB100025\-030920

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: 10190747
- Published by NHTSA: 2021\-04\-26
- Manufacturer's number: TSB100025\-030920
- Manufacturer's date: 2021\-03\-09
- NHTSA component: FUEL SYSTEM, GASOLINE

## NHTSA's summary

This Technical Service Bulletin informs the field of an issue causing fuel pump leaks on Bosch common rail fuel systems. High fuel inlet and fuel drain line restrictions can lead to an external or internal fuel leak from the fuel pump. It is important to inspect the fuel supply and fuel drain line for signs of restrictions if an engine has a fuel leak from the fuel pump weep hole. This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190747-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190747-9999.pdf)

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

## Components

Fuel system

## Vehicles listed

- CUMMINS B6.7
- CUMMINS ISB5.9 G
- CUMMINS ISB6.7

JSON: [/v1/bulletins/10190747](/v1/bulletins/10190747)

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