Proterra ZX5, Catalyst: Brakes

Affects Proterra ZX5, Catalyst · 2019–2022 — about 64 vehicles.

The hazard

Issue: On certain buses, a check valve leak could cause air from the ride height system to apply the parking brake suddenly while driving. Note: This recall only affects buses built with a Parker ride height system. Safety Risk: A parking brake that self-applies while driving could increase the risk of a crash. Corrective Actions: Proterra will notify owners by mail and provide a free remedy to separate the ride height exhaust line from the parking brake exhaust line.

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