# NHTSA recall 21V720000

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: 21V720000
- Manufacturer's number: 21PBK
- Manufacturer: PACCAR Incorporated
- Reported: 2021\-09\-16
- Owners notified: 2021\-10\-07
- Component: SERVICE BRAKES, AIR
- Units potentially affected: 15

## What is wrong

PACCAR Incorporated \(PACCAR\) is recalling certain 2020\-2021 Peterbilt 520 vehicles.  The quick release valve on the rear brake signal hose may be missing.  As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."


## What can happen

A missing quick release valve cannot ensure correct rear brake release timing, increasing the risk of a crash or injury.


## The remedy

Dealers will inspect the vehicles for a missing quick release valve, and install one if necessary, free of charge.  Owner notification letters were mailed on October 7, 2021.  Owners may contact PACCAR's customer service at 1\-940\-591\-4220 \(Peterbilt\).  PACCAR's number for this recall is 21PBK.


## 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.nhtsa.gov.


## Remedy progress the manufacturer reported

- Report: Annual report 2, for 2024 quarter 4 to 2025 quarter 3
- Filed with NHTSA: 2025\-10\-30
- Vehicles in the campaign: 15
- Reported remedied: 12 \(80%\)
- Reported unreachable: 2
- Reported removed: 0

These are the manufacturer's totals for the whole campaign at the end of 2025 quarter 3, 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)
- [2021 PETERBILT 520](/makes/peterbilt/520/2021/recalls.md)

## Bulletins for the same vehicles and component

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

- [13\-060](/bulletins/10219235.md), 2022-09-06, Service bulletin
- [21 PBK](/bulletins/10201947.md), 2021-10-05, Service bulletin
- [20 PBF](/bulletins/10185194.md), 2021-01-06, Service bulletin
- [13\-055](/bulletins/10182219.md), 2020-11-05, Service bulletin
- [13\-054](/bulletins/10177935.md), 2020-08-05, Service bulletin
- [20PBB](/bulletins/10173210.md), 2020-04-03, 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/21V720000](/v1/recalls/nhtsa/21V720000)

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