Key Takeaway
Stability Control Brake Relay Hose Misconnected by PACCAR, INCORPORATED was recalled on November 27, 2020. What to do: PACCAR will notify owners, and dealers will inspect the suspect chassis and correct the brake relay plumbing if needed, free of charge. PACCAR has is...
Stability Control Brake Relay Hose Misconnected
Description
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.
Injuries / Consequence
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.
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.
Products Affected
Vehicle
VehiclesCompany Information
PACCAR, INCORPORATED
Unknown location
View all 453 recalls by PACCAR, INCORPORATED →Related Recalls
Steering Cross-Shaft May Fail
January 20, 2026
Insufficient Air Volume in Brake System /FMVSS 121
November 18, 2025
Instrument Panel Display Failure/FMVSS 101 & 121
September 3, 2025
Insufficient Illumination from Lights/FMVSS 108
June 27, 2025
Service Brakes May Fail
May 29, 2025
Defective Harness May Cause Loss of Drive Power
March 25, 2025
Frequently Asked Questions
Is this recall still active?
Check the status badge at the top of this page. "Ongoing" means the recall is still active and you should follow the remedy instructions. "Completed" or "Terminated" means the recall process has concluded, though the safety issue remains relevant for any unrepaired products.
How do I check if my product is affected?
Compare the model number, lot code, serial number, or date range listed in the recall notice with the information on your product's label or packaging. For vehicles, check your VIN at NHTSA.gov/Recalls.
What remedy is available for this recall?
The listed remedy for this recall is: 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,...
Where can I find the original recall notice?
This recall was issued by NHTSA. You can view the original notice using the link provided above.