NHTSA campaign 22V855000 · Proterra campaign SC-22-158
Proterra Recall 22V-855: Parking Brake Can Unintentionally Engage
NHTSA recall 22V855000 (Proterra campaign SC-22-158) was reported by Proterra Operating Company, Inc. on November 18, 2022, with 386 vehicles potentially affected (per NHTSA). NHTSA's record lists the Proterra ZX5 and Proterra Catalyst for model years 2019–2022. Owners were notified on December 21, 2022, per NHTSA.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 22V855000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 22V855000 (also written 22V-855 or 22V855)
- Filed by
- Proterra Operating Company, Inc.
- Proterra campaign number
- SC-22-158
- Report received
- Potentially affected
- 386 vehicles (per NHTSA)
- Component
- Parking Brake
- Owners notified
Repair completion: 88.08% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 22V855000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
NHTSA's recall notice
As NHTSA's recall record states it for campaign 22V855000.
Defect description
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.
Safety consequence
Unintentional engagement of the parking brake increases the risk of a crash.
Manufacturer 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.
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.
Sources
Official NHTSA notice for recall 22V855000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.