Recall
Proterra Zx5 — 22V855000
NHTSA ID
22V855000
Make
Proterra
Model
Zx5
Years Affected
2021
Recall Date
2022-11-18
Component
PARKING BRAKE
Units Affected
386
Completion Rate
—
Mfr Campaign No.
SC-22-158
Summary
Proterra Operating Company, Inc. (Proterra) is recalling certain 2020-2021 Catalyst and 2019-2022 ZX5 transit buses. Back pressure in the shared air exhaust for the pneumatic ride height system and parking brake control valve may engage the parking brake while the vehicle is in motion.
Consequence
Unintentional engagement of the parking brake increases the risk of a crash.
Remedy
Proterra will install a redesigned air circuit, free of charge. Owner notification letters were mailed on December 21, 2022. Owners may contact Proterra's customer service at 1-864-438-0000.