Peterbilt 320, 325 +11 more: Brakes

Affects Peterbilt 320, 325, 389K, 384, 389, 365, 386, 367, 340, 388, 335, 330, 387 · 2008 — about 597 vehicles.

The hazard

Certain vehicles fail to comply with requirements of CMVSS 121 - Air Brake System. The air lines were incorrectly constructed with only four layers of extruded nylon material, instead of the specified five layers. Should the air lines develop a leak, while the vehicle is in motion, it could cause the air brake system to fail, which would engage the rear spring brakes, slowing the vehicle to a stop, and preventing it from being driven. Correction: Dealers will inspect and, if required, replace the air lines.

What to do

Contact your dealer; the remedy details were not included in the filing.

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