- Vehicles
- 386
- Built between
- Not published
- Models
- 2
- Recall type
- Vehicle
- Initiated by
- Manufacturer
- Owners notified
- 21 December 2022
- Repaired
- 88%
- Unrepaired
- 48
Does this affect my vehicle?
The manufacturer did not publish a build-date range for this recall, so the model and year list below is the only way to tell whether your vehicle is covered.
- 2020-2021 Proterra Catalyst
- 2019-2022 Proterra ZX5
Repair progress
48 of 386 vehicles in this recall had still not been repaired as of Q4 2024.
88% repaired — 338 of 386 reported
Manufacturers file these figures with NHTSA each quarter. Vehicles the manufacturer could not trace, or that have been scrapped or exported, are counted separately and are not included in the unrepaired figure.
What the defect is
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.
What could happen
Unintentional engagement of the parking brake increases the risk of a crash.
What gets fixed
Proterra will install a redesigned air circuit, free of charge. Owner notification letters were mailed on December 21, 2022.
Parts involved
- Assembly, Install Front Air Valve Subassy062765Shared air exhaust port check valve assembly
Part numbers are as filed by the manufacturer and are listed for reference. Your dealer will confirm the correct part for your vehicle.
Timeline
- Recall reported to NHTSA18 November 2022
- Owners notified21 December 2022
- Latest repair reportQ4 2024 — 88% repaired
Your rights
A safety recall repair is free. Under US federal law the manufacturer must fix a safety defect at no cost to you — no charge for parts, labor or diagnosis — whether or not you are the original owner. A dealer cannot charge you for recall work, and cannot require you to have bought the vehicle from them.
That entitlement is not unlimited. It applies where the vehicle was first sold less than 15 years before the recall was announced — 5 years for tires. Past that a manufacturer may still do the repair free of charge, and many do, but they are no longer obliged to. This recall was reported on 18 November 2022.
To arrange the repair, contact any franchised dealer for the brand. If a dealer refuses the work or tries to charge for it, you can report that to NHTSA at nhtsa.gov/recalls or on 1-888-327-4236.
Manufacturer contact
Owners may contact Proterra's customer service at 1-864-438-0000.
Official source
- Manufacturer's recall number
- SC-22-158
- Recalling manufacturer
- Proterra Operating Company, Inc.
- Recall initiated by
- MFR
Everything on this page — the models listed, the build dates and the repair figures — comes from the manufacturer's filing to NHTSA and describes the vehicle line as a whole, not any individual car. Only the manufacturer can confirm whether a specific vehicle is affected, and whether its recall work has already been carried out. Check yours by VIN and read the official notice at nhtsa.gov/recalls.
Additional notes
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.
Check your own vehicle
This page describes the recall, not any one car. To see which recalls cover a specific vehicle, search by make, model and year.
A VIN lookup here identifies your vehicle and shows recalls issued for that make, model and year. It cannot tell you what is still open on your individual car - only the manufacturer knows that. Search by VIN instead, or check your VIN at nhtsa.gov for whether a recall is still open on your individual car.