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 |
| 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.
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.
| 2020 PETERBILT 520 | |
|---|---|
| 2021 PETERBILT 520 |
A vehicle with no link is not in this site's catalog, which covers cars, multipurpose vehicles and trucks by model year. The campaign is from data as of 2026-10-19.
Bulletins for the same vehicles and component
| 13-060 | 2022-09-06. Service bulletin. The service information for Bendix Air Dryer maintenance is being updated to include new procedures. |
|---|---|
| 21 PBK | 2021-10-05. Service bulletin. Safety Recall – Certain Model 520 trucks may have been built without a quick release (QR) valve. The absence of this valve could affect rear brake timing on certain vehicles equipped with a tri-drive or liftable tag axle and Dual Seated or Right Hand Stand-Up steering configurations. Vehicles will be inspected and, if necessary, a QR valve will be installed. |
| 20 PBF | 2021-01-06. Service bulletin. Safety Recall: Interim Dealer Notification - Peterbilt has decided that a condition affecting vehicle stability may exist in certain Model 520 vehicles built from 9/26/2019 through 7/22/2020 with stability control and a spring brake modulator valve (SBM) or lift axle. The Stability Control Relay may have been plumbed incorrectly, which could cause a stability event that may actuate the lift axle brakes or modulate the park brake chambers, which could destabilize the vehicle. This bulletin will be updated as soon as an affected chassis list is defined and a repair procedure is developed. |
| 13-055 | 2020-11-05. Service bulletin. Fix as Fail: Peterbilt has introduced an improved mounting bracket for low mount air tanks for vehicles built between January 01, 2017 and July 06, 2020. Torsional vibration may stress the currently-installed brackets and cause them to fail near the bottom of the frame rail. |
| 13-054 | 2020-08-05. Service bulletin. Fix-As-Fail - Bendix New-Gen Lightweight Steer Axle Drum Brake Spider Cracking |
| 20PBB | 2020-04-03. Service bulletin. Safety Recall: Peterbilt has decided that certain Model 320 and 520 trucks built between 2/20/2015 and 7/16/2019 may have been built without a quick release valve. The absence of this valve could affect rear brake timing on certain vehicles equipped with a tri-drive or liftable tag axle and Dual Seated or Right Hand Stand-Up steering configurations. Resolutoin is to inspect for a quick release valve installed, and if there is not one, to install a quick release valve. |
A bulletin is the manufacturer's note to its dealers. It is not part of this recall.