2016–2020 Peterbilt 320, 2016–2020 Peterbilt 520 Recall: Rear brake signal hose may be missing a quick release valve, possibly…
NHTSA campaign 20V132000 · Service Brakes, Air · filed Mar 4, 2020 · verified Jul 30, 2026
The defect
PACCAR Incorporated (PACCAR) is recalling certain 2016-2020 Peterbilt 320 and 520 vehicles with dual foot valves and a liftable tag or tri-drive rear axles. The rear brake signal hose may be missing a quick release valve, possibly causing a delay in their brake release timing. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Disc Brakes."
The risk
A delayed brake release may increase the risk of 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
PACCAR will notify owners, and dealers will check the vehicles for a quick release valve, installing one as necessary, free of charge. The recall began March 24, 2020. Owners may contact PACCAR customer service at 1-940-591-4220. PACCAR's number for this recall is 20PBB.
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 320 recalls
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Other campaigns involving Peterbilt vehicles
Source: NHTSA recall database, campaign 20V132000 (manufacturer number 20PBB). Data last verified Jul 30, 2026.