Western Star 4900: Brakes

Affects Western Star 4900 · 2015–2018 — about 199 vehicles.

The hazard

On certain vehicles outfitted with triple compartment aluminium air tanks, the end caps of the tanks may have received incomplete welds during manufacturing. If a weld were to separate on the tanks, it would result in a rapid loss of air pressure, which could cause reduced brake performance, or unexpected application of the parking brakes, increasing the risk of a crash causing injury and/or damage to property. Correction: Dealers will replace the affected tanks with triple compartment steel air tanks.

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