# Service bulletin 43\-066

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: 10173583
- Published by NHTSA: 2020\-04\-07
- Manufacturer's number: 43\-066
- Manufacturer's date: 2020\-03\-27
- NHTSA component: STRUCTURE

## NHTSA's summary

DEF tank covers may become loose and potentially crack on vehicles built before October 2019 with DEF tank part number M86\-6221\-003\*\*\(TANK\-DEF MEDIUM ASSY\) and M86\-6222\-003\*\*\(TANK\-DEF LARGE, ASSY\). Resolution is to resolve the vibration on the tank cover by adding bottom tank washers.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10173583-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10173583-9999.pdf)

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

## Components

Body and frame

## Vehicles listed

- 2015 to 2019 KENWORTH C500
- 2015 to 2016 KENWORTH C540
- 2015 to 2016 KENWORTH C550
- 2016 KENWORTH K170
- 2015 to 2018 KENWORTH K270
- 2015 to 2016 KENWORTH K300
- 2015 to 2018 KENWORTH K370
- 2015 to 2019 KENWORTH T170
- 2015 to 2019 KENWORTH T270
- 2015 to 2019 KENWORTH T370
- 2015 KENWORTH T400
- 2015 to 2019 KENWORTH T440
- 2015 to 2017 KENWORTH T470
- 2017 to 2019 KENWORTH T600
- 2015 to 2019 KENWORTH T660
- 2015 to 2019 KENWORTH T680
- 2015 to 2019 KENWORTH T800
- 2015 to 2019 KENWORTH T880
- 2015 to 2019 KENWORTH W900
- 2019 KENWORTH W990
- 2015 to 2016 PACCAR C540
- 2015 to 2017 PACCAR MX\-11
- 2015 to 2017 PACCAR MX\-13
- 2015 to 2018 PETERBILT 210
- 2015 to 2018 PETERBILT 220
- 2015 to 2019 PETERBILT 320
- 2015 to 2019 PETERBILT 325
- 2015 to 2019 PETERBILT 330
- 2015 to 2019 PETERBILT 337
- 2015 to 2019 PETERBILT 348
- 2015 to 2016 PETERBILT 357
- 2015 to 2019 PETERBILT 365
- 2015 to 2019 PETERBILT 367
- 2015 to 2016 PETERBILT 378
- 2015 to 2016 PETERBILT 379
- 2015 to 2016 PETERBILT 382
- 2015 to 2019 PETERBILT 384
- 2015 to 2016 PETERBILT 385
- 2015 to 2019 PETERBILT 386
- 2015 to 2016 PETERBILT 387
- 2015 to 2019 PETERBILT 388
- 2015 to 2019 PETERBILT 389
- 2016 PETERBILT 389G
- 2015 to 2016 PETERBILT 520
- 2017 to 2019 PETERBILT 520
- 2015 to 2019 PETERBILT 567
- 2015 to 2019 PETERBILT 579
- 2015 to 2019 PETERBILT 587

## Recalls for the same vehicles and component

- [2020551](/recalls/tc/2020551.md), 2020-11-12: Structure
- [2016482](/recalls/tc/2016482.md), 2016-10-03: Structure
- [16V633000](/recalls/nhtsa/16V633000.md), 2016-08-31: STRUCTURE:BODY

## Other bulletins for the same vehicles and component

- [02\-201](/bulletins/11032879.md), 2026-05-20, Service bulletin: STRUCTURE:BODY. This recently published bulletin has been updated to include inspection procedures to assess if a hood is repairable.
- [02\-201](/bulletins/11032294.md), 2026-05-06, Service bulletin: STRUCTURE:BODY. Model 567 Hood Strut Support Structure \-A new procedure is now available to install hood structure reinforcements on Model 567 and 567 BEV chassis, improving performance and durability.
- [02\-178](/bulletins/10235714.md), 2023-05-05, Service bulletin: STRUCTURE; VISIBILITY. Fix As Fail – Certain 579, and New Model 579 chassis that were manufactured with a Bendix forward looking camera system may experience bracket failure causing the bracket and camera to fall from the windshield.
- [32\-019](/bulletins/10232162.md), 2023-03-01, Service bulletin: STRUCTURE; ELECTRICAL SYSTEM. Fix As Fail – Chassis that were manufactured with certain battery cable routing brackets may experience rubbing or chafing of the battery cables.
- [04\-019](/bulletins/10210949.md), 2022-05-05, Service bulletin: STRUCTURE; EQUIPMENT. A roof fairing reinforcement kit increases structural support for one\-piece 579 roof fairings that are experiencing fatigue from external forces such as reverse towing.
- [02\-161](/bulletins/10191768.md), 2021-05-05, Service bulletin: STRUCTURE. Non\-Safety Campaign\- Chassis Fairings become loose and rattle.
- [51\-009](/bulletins/10186166.md), 2021-02-01, Service bulletin: STRUCTURE; EQUIPMENT. Predictive Cruise control \(PCC\) incomplete assembly and programming.
- [02\-136](/bulletins/10185912.md), 2021-01-25, Service bulletin: STRUCTURE; EQUIPMENT. Sleeper roof panels separating.
- [02\-158](/bulletins/10179370.md), 2020-09-03, Service bulletin: EQUIPMENT; STRUCTURE; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Fix as Fail: Peterbilt has determined that certain model 348, 365, 367, 382, 384, 386, 388, 389, 567, 579, and 587 trucks, built between 4/13/2010 and 3/16/2020 and equipped with a flush mounted battery box, utilized rubber washers that could rub through and cause the aluminum box mounting tabs to rub directly on the steel frame brackets. This could result in cracked battery box mounting angles. Resolution is to add the reinforcement bracket\(s\) to affected vehicles.
- [14\-026](/bulletins/10177939.md), 2020-08-05, Service bulletin: STRUCTURE. Fix as Fail: Peterbilt has designed an improved Secondary Chassis Module \(SCM\) bracket which is available for Models 567/579 built between January 01, 2018 and February 20, 2020. SCM brackets impacted by torsional stress may separate from the back of cab crossmember.

JSON: [/v1/bulletins/10173583](/v1/bulletins/10173583)

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