Kenworth T800, C500 +2 more: Brakes

Affects Kenworth T800, C500, W900, T2000 · 2006–2007 — about 52 vehicles.

The hazard

Certain trucks fail to comply with the requirements of CMVSS 121 - Air Brake Systems. In designing a Primaax suspension into certain models, engineers relocated the single relay valve. The relocation increased overall air line length, exceeding the limit for the single valve system. This would result in delayed brake application which could cause a vehicle crash with injury or death. Correction: Dealers will convert vehicles from a single relay valve to a dual relay valve system.

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