2019–2022 Proterra Catalyst, 2019–2022 Proterra ZX5 Recall: A transistor inside the inverter may overheat and fail, which can result…
NHTSA campaign 23V697000 · Electrical System · filed Oct 17, 2023 · verified Jul 30, 2026
The defect
Proterra Operating Company, Inc. (Proterra) is recalling certain 2019-2022 40' and 35' Catalyst 800V transit buses equipped with ProDrive 1.0, and 40' and 35' ZX5 800V transit buses equipped with ProDrive 1.0. A transistor inside the inverter may overheat and fail, which can result in a loss of power steering and drive power.
The risk
A loss of power steering and/or drive power increases the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Dealers will replace the inverter, free of charge. Owner notification letters were mailed December 16, 2023. Owners may contact Proterra customer service at 1-864-438-0000.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Affected vehicles
Related recalls
More Proterra Catalyst recalls
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- 2017–2019 Proterra Catalyst — One or more battery packs may allow liquid to leak into and…
- 2020–2021 Proterra Catalyst and 1 other model — Back pressure in the shared air exhaust for the pneumatic…
- 2015–2022 Proterra Catalyst and 1 other model — Plexus adhesive between the torque limiter plate and the…
Other campaigns involving Proterra vehicles
Source: NHTSA recall database, campaign 23V697000. Data last verified Jul 30, 2026.