# Service bulletin CALFTL49\-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: 10173644
- Published by NHTSA: 2020\-04\-09
- Manufacturer's number: CALFTL49\-001
- Manufacturer's date: 2020\-04\-08
- NHTSA component: SERVICE BRAKES, AIR; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

## NHTSA's summary

Customer Advisory Letter for Tailpipe Adaptation to Protect Right\-Hand Brake Chamber. Some Business Class M2 vehicles have a horizontal tailpipe with an outlet too close to the forward drive axle, which, over time, may overheat and thereby damage the right\-hand brake chamber on that axle.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10173644-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10173644-9999.pdf)

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

## Components

Brakes, Engine, Exhaust and emissions, Exhaust manifold, pipes and muffler

## Vehicles listed

- 2016 FREIGHTLINER BUSINESS CLASS M2

JSON: [/v1/bulletins/10173644](/v1/bulletins/10173644)

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