2021 Peterbilt 348, 2021 Peterbilt 579 Recall: Spring brake chamber may have been assembled with incorrect springs that…
NHTSA campaign 21V328000 · Service Brakes, Air · filed May 10, 2021 · verified Jul 30, 2026
The defect
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.
The risk
The pressure plate may tear the diaphragm, causing a loss of air pressure and increasing the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
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.
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.
Affected vehicles
Related recalls
More Peterbilt 348 recalls
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- 2022–2023 Kenworth C500 and 26 other models — Steering gears may have been assembled incorrectly, which…
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Other campaigns involving Peterbilt vehicles
Source: NHTSA recall database, campaign 21V328000 (manufacturer number 21PBE). Data last verified Jul 30, 2026.