PROTERRA 2021 PROTERRA CATALYST Recall
Check Your Product
According to the National Highway Traffic Safety Administration (NHTSA)
Product
2021 PROTERRA CATALYST
Brand
PROTERRA
Lot Codes / Batch Numbers
Not specified in NHTSA notice. Check official source for details.
Products Sold
Model Year 2021
Proterra Operating Company, Inc. is recalling certain 2021 PROTERRA CATALYST vehicles due to parking brake issues. Unintentional engagement of the parking brake increases the risk of a crash..
Summary derived from NHTSA notice
Reason for Recall
As stated by NHTSA
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.
Reported concern (NHTSA)
Unintentional engagement of the parking brake increases the risk of a crash.
Recommended Action
Per NHTSA guidance
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.
Verify this information on the official source
For complete details and official instructions, check the National Highway Traffic Safety Administration (NHTSA) directly.
View official NHTSA recall noticePage updated: Jan 10, 2026