# Service bulletin WB23\-L\-001

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: 10235685
- Published by NHTSA: 2023\-05\-05
- Manufacturer's number: WB23\-L\-001
- Manufacturer's date: 2023\-04\-26
- NHTSA component: FUEL SYSTEM, GASOLINE

## NHTSA's summary

Isuzu Commercial Truck of America \(ICTA\) has been receiving warranty part returns that have aftermarket catalytic converters welded in place instead of the OEM catalytic converter. This is because vehicle owners who have had the OEM or Fleet Value catalytic converters stolen from their vehicles often replace the stolen catalytic converters aftermarket with non\-Isuzu parts. When those replacement parts fail and cause the check engine light to illuminate, vehicle owners may seek to have the non\-Isuzu replacement catalytic converter repaired or replaced under warranty. In fact, however, neither the new vehicle warranty nor the one\-year replacement part warranty covers the failed non\-Isuzu part.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10235685-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10235685-9999.pdf)

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

## Components

Fuel system

## Vehicles listed

- 2012 to 2023 ISUZU N\-SERIES

JSON: [/v1/bulletins/10235685](/v1/bulletins/10235685)

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