PETERBILT 2021 PETERBILT 579 Recall
Check Your Product
According to the National Highway Traffic Safety Administration (NHTSA)
Product
2021 PETERBILT 579
Brand
PETERBILT
Lot Codes / Batch Numbers
Not specified in NHTSA notice. Check official source for details.
Products Sold
Model Year 2021
PACCAR Incorporated is recalling certain 2021 PETERBILT 579 vehicles due to service brakes, air:disc:chamber issues. The pressure plate may tear the diaphragm, causing a loss of air pressure and increasing the risk of a crash..
Summary derived from NHTSA notice
Reason for Recall
As stated by NHTSA
PACCAR Incorporated (PACCAR) is recalling certain 2021 Peterbilt 348 and 579 vehicles. The spring brake chamber may have been assembled with incorrect springs that were out of specification, which may cause the pressure plate to shift.
Reported concern (NHTSA)
The pressure plate may tear the diaphragm, causing a loss of air pressure and increasing the risk of a crash.
Recommended Action
Per NHTSA guidance
Dealers will replace brake chambers, free of charge. Owner notification letters were mailed on July 9, 2021. Owners may contact PACCAR (Peterbilt) customer service at 1-940-591-4220. PACCAR's number for this recall is 21PBE.
Verify this information on the official source
For complete details and official instructions, check the National Highway Traffic Safety Administration (NHTSA) directly.
View official NHTSA recall noticePage updated: Jan 10, 2026