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2019 Proterra Catalyst
9 recall campaigns and 0 complaints are on NHTSA's register for the 2019 Proterra Catalyst; the recalls concern electrical system, steering and structure.
No consumer complaints for this model year are in the NHTSA file.
NHTSA's Office of Defects Investigation has opened 1 investigation naming this model year.
Complaints are consumer reports and have not been verified by NHTSA. Recall text is the manufacturer's Part 573 report as filed with NHTSA. Complaint file through 15 May 2019; recall file through 29 Sep 2026.
Recalls by model year:
Recall campaigns
Defect, as filed: Phoenix Motorcars (Phoenix) is recalling certain 2019-2021 800V Catalyst and 2020-2022 ZX5 transit buses. The vehicle controller software may allow the electrical circuit for the radiator fan to overheat.
Consequence: Electrical circuits that overheat increase the risk of a fire.
Remedy: Dealers will update the vehicle software, free of charge. Owner notification letters were mailed October 15, 2024. Owners may contact Phoenix customer service at 1-909-987-0815.
Filed by Phoenix Motorcars (manufacturer campaign SC-24-009).
Defect, as filed: 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.
Consequence: A loss of power steering and/or drive power increases the risk of a crash.
Remedy: 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.
Filed by Proterra Operating Company, Inc..
Defect, as filed: Proterra Operation Company, Inc. (Proterra) is recalling certain 2017-2019 Catalyst transit buses. One or more battery packs may allow liquid to leak into and accumulate in the battery pack enclosure.
Consequence: The accumulation of liquid inside the battery pack enclosure increases the risk of a fire.
Remedy: Proterra will update software, inspect, and replace the battery pack, free of charge. Owner letters were mailed November 6, 2023. Owners may contact Proterra's customer service at 1-864-438-0000.
Filed by Proterra Operating Company, Inc..
Defect, as filed: Proterra, Inc. (Proterra) is recalling certain 2017-2019 35 foot Catalyst E2, 2017-2019 40 foot E2, 2020-2021 35 foot RR, 2019-2020 40 foot RR, 2019-2022 40 foot ZX5, and 2020-2022 35 foot ZX5 buses. The plexus adhesive between the torque limiter plate and the bus body may be insufficient, causing the bolts that secure the steering gearbox to loosen.
Consequence: A loose steering gearbox can cause a loss of steering control, increasing the risk of a crash.
Remedy: Dealers will install a mechanical fastener and new bolts on the steering gearbox, and install a new torque plate, as necessary, free of charge. Owner notification letters were mailed October 7, 2022. Owners may contact Proterra's customer service at 1-864-438-0000.
Filed by Proterra, Inc. (manufacturer campaign SC-22-040).
Defect, as filed: Proterra, Inc. (Proterra) is recalling certain 2019-2020 Catalyst 40 foot buses. A software defect in the body controller that operates the door motor may allow the rear door to open unexpectedly.
Consequence: The rear door may open without the driver's awareness, increasing the risk of injury.
Remedy: Proterra will notify owners, and dealers will update the software, free of charge. Owner notification letters were mailed on June 11, 2021. Owners may contact Proterra customer service at 1-864-438-0000.
Filed by Proterra, Inc. (manufacturer campaign SC-21-085).
Defect, as filed: Proterra Inc. (Proterra) is recalling certain 2018-2020 35 foot and 40 foot Catalyst buses. Lack of plexus adhesive between the torque plate and the vehicle chassis may cause the bolts securing the steering gear box to loosen.
Consequence: An unsecured steering gear box could cause the driver to lose the ability to steer the vehicle, increasing the risk of crash or injury.
Remedy: Proterra will notify owners, and dealers will inspect the steering gear mounting bolts and the plexus adhesive layer between the torque plate and the chassis. If the plexus adhesive layer is missing or insufficient, the components will be repaired, free of charge. The recall began December 10, 2020. Owners may contact Proterra customer service at 1-864-438-0000. Proterra's number for this recall is SC-20-154.
Filed by Proterra Inc. (manufacturer campaign SC-20-154).
Defect, as filed: Proterra Inc. (Proterra) is recalling certain 2019-2020 Battery-Electric 40' Catalyst and 2020 Battery-Electric 35' Catalyst buses. The power steering hose located at the pump and reservoir may leak and sweat fluid through the hose.
Consequence: A power steering fluid leak can increase the risk of a crash.
Remedy: Proterra will notify owners, and dealers will inspect and replace the power steering hose, free of charge. The recall began October 6, 2020. Owners may contact Proterra customer service at 1-864-438-0000. Proterra's number for this recall is SC-20-141.
Filed by Proterra Inc. (manufacturer campaign SC-20-141).
Defect, as filed: Proterra, Inc. (Proterra) is recalling certain 2019 Catalyst buses. A body controller software update may have disabled the audible and visible warnings that notifies the operator that the brake interlock could be engaged.
Consequence: If the vehicle does warn the driver that the brake interlock is engaged, the rear brakes may overheat, increasing the risk of a fire or crash.
Remedy: Proterra will notify owners, and dealers will update the body controller software, free of charge. The recall began January 16, 2020. Owners may contact Proterra customer service at 1-864-438-0000.
Filed by Proterra Inc..
Defect, as filed: Proterra, Inc. (Proterra) is recalling certain 2018-2019 Catalyst buses equipped with a certain batch of glass roof hatches. Temperature and vibration stresses may cause the tempered glass roof hatch to shatter.
Consequence: If the tempered glass roof hatch shatters, glass fragments may fall onto passengers, increasing the risk of an injury.
Remedy: Proterra will notify owners, and the glass hatch manufacturer will provide replacement hatch lids, free of charge. The recall began August 13, 2019. Owners may contact Proterra at 1-864-438-0000. Proterra's number for this recall is SC-19-79.
Filed by Proterra Inc. (manufacturer campaign SC-19-79).
Each entry links to the NHTSA record. NHTSA states that safety recall repairs are free of charge at an authorised dealer; check a specific vehicle by VIN at nhtsa.gov/recalls.
Complaints by component
No consumer complaints for this model year are in the NHTSA file.
Investigations
| Action | Type | Subject | Component | Opened | Closed | Recall |
|---|---|---|---|---|---|---|
| RQ25001 | Recall query | Remedy Effectiveness of Recall 22V887 | electrical system:propulsion system:traction battery | 27 Jun 2025 | open | — |
Other Proterra Catalyst model years
| Model year | Recalls | Complaints | Units in campaigns |
|---|---|---|---|
| 2015 | 4 | 0 | 1,257 |
| 2016 | 6 | 0 | 1,374 |
| 2017 | 8 | 0 | 1,821 |
| 2018 | 9 | 0 | 1,785 |
| 2019 | 9 | 0 | 1,931 |
| 2020 | 8 | 0 | 2,108 |
| 2021 | 5 | 0 | 2,083 |
| 2022 | 3 | 0 | 1,214 |
Model years with a single campaign and fewer than 25 complaints have no page here; the NHTSA link opens the agency's record for that year.
All Proterra Catalyst model years · Proterra: 2 model lines
Questions and answers
How many recalls does the 2019 Proterra Catalyst have?
9 NHTSA recall campaigns name this model year; the most recent, 24V655000, was reported to NHTSA on 6 Sep 2024 and concerns electrical system. Across all model years the Proterra Catalyst line has 17 campaigns.
Is there an open NHTSA investigation into the 2019 Proterra Catalyst?
NHTSA's investigation file lists 1 action naming this model year; the table above shows each action's opening and closing dates. An action with no closing date was still open when the file was produced.
What component do owners of the 2019 Proterra Catalyst complain about most?
No complaints for this model year are in the NHTSA file.
How do I get a recall repaired?
NHTSA states that safety recall repairs are performed free of charge by the manufacturer's authorised dealers. Each campaign's remedy text above is the manufacturer's statement as filed with NHTSA. Check your VIN at nhtsa.gov/recalls to see whether a specific vehicle has an unrepaired recall.
Where does this data come from?
NHTSA's Office of Defects Investigation recall, complaint and investigation flat files, public domain, downloaded 29 Sep 2026. Complaint counts are unique complaint numbers per make, model and model year; component figures count each component a complaint names. The NHTSA record linked from each campaign is authoritative.
Provenance
Source: National Highway Traffic Safety Administration, Office of Defects Investigation flat files (recalls, complaints, investigations), public domain, files dated 29 Sep 2026 (recalls) and 15 May 2019 (complaints). Complaints since 1 Jan 1995. Counts are unique complaint numbers per make, model and model year; per-1,000 rates divide a component's mentions by all mentions for the same group. Errors in processing are corrected at the next daily build; see corrections and the methodology.