Peterbilt 520: Service brakes — air

Affects Peterbilt 520 · 2020–2021 — about 15 vehicles.

The hazard

A missing quick release valve cannot ensure correct rear brake release timing, increasing the risk of a crash or injury.

What to do

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.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational