# NHTSA recall 20V739000

A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.

- Published by: NHTSA \(United States\)
- Campaign number: 20V739000
- Manufacturer's number: 20PBF
- Manufacturer: PACCAR Incorporated
- Reported: 2020\-11\-25
- Owners notified: 2021\-01\-25
- Component: ELECTRONIC STABILITY CONTROL \(ESC\)
- Units potentially affected: 11

## What is wrong

PACCAR Incorporated \(PACCAR\) is recalling certain 2020\-2021 Peterbilt 520 vehicles.  The stability control brake relay may have the Spring Brake Modulating \(SBM\) Valve or the lift axle hose incorrectly connected.


## What can happen

A stability control event meant to only actuate the ABS controlled wheel ends could actuate lift axle brakes or modulate park brake chambers and could possibly de\-stabilize the vehicle, increasing the risk of a crash.


## The remedy

PACCAR will notify owners, and dealers will inspect the suspect chassis and correct the brake relay plumbing if needed, free of charge.  PACCAR has issued owners an interim notification on January 4, 2020.  Owner notification letters were mailed on January 25, 2021.  Owners may contact Peterbilt customer service at 1\-940\-591\-4220.  PACCAR's number for this recall is 20PBF.


## Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1\-888\-327\-4236 \(TTY 1\-800\-424\-9153\), or go to www.safercar.gov.


## Remedy progress the manufacturer reported

- Report: Quarterly report 8, for 2022 quarter 4
- Filed with NHTSA: 2023\-01\-20
- Vehicles in the campaign: 11
- Reported remedied: 11 \(100%\)
- Reported unreachable: 0
- Reported removed: 0

These are the manufacturer's totals for the whole campaign at the end of 2022 quarter 4, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026\-10\-19.

## Vehicles this campaign lists

- [2020 PETERBILT 520](/makes/peterbilt/520/2020/recalls.md). Built 2019\-09\-26 to 2020\-07\-22.
- [2021 PETERBILT 520](/makes/peterbilt/520/2021/recalls.md). Built 2019\-09\-26 to 2020\-07\-22.

## Bulletins for the same vehicles and component

A bulletin is the manufacturer's note to its dealers. It is not part of this recall.

- [24KWL/PBL](/bulletins/11036291.md), 2026-08-20, Service bulletin
- [24PBL](/bulletins/11013775.md), 2025-02-05, Service bulletin
- [46\-003](/bulletins/10245191.md), 2023-11-10, Service bulletin
- [20 PBF](/bulletins/10185194.md), 2021-01-06, Service bulletin

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

JSON: [/v1/recalls/nhtsa/20V739000](/v1/recalls/nhtsa/20V739000)

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