Recall 22V114 affects 724 2015-2022 Proterra ZX5 and Catalyst buses for loose steering gearbox bolts. Repair is free at any franchised Proterra dealer.
Proterra is recalling 724 2015-2022 ZX5 and Catalyst buses because insufficient adhesive between the torque limiter plate and bus body can loosen the bolts that secure the steering gearbox. A loose steering gearbox can cause loss of steering control and increase crash risk; Proterra dealers will complete the free repair.
Does this recall apply to your specific vehicle?
The official, free per-VIN recall check is run by NHTSA. Enter your VIN and we'll forward you directly — and add you to a free watchlist so you hear about new recalls for your vehicle.
Check my VIN at NHTSARecallNotify doesn't check your VIN — NHTSA's official tool does. We use your email only to alert you to new recalls.
Watch this vehicle for recalls
Add it to your free watchlist and we will alert you as new federal recalls are posted for your year, make and model. New-recall alerts are rolling out now.
You are on the watchlist.
We will email you as new federal recalls are posted for your vehicle.
What's wrong?
The torque limiter plate on 2015-2022 Proterra ZX5 and Catalyst buses is the mounting point that attaches the steering gearbox to the bus body. The steering gearbox turns steering-wheel input into movement at the steering linkage, so it needs a solid mount to keep the front wheels responding as intended. Bolts hold that gearbox against the plate and body.
On affected buses, there was not enough plexus adhesive between the torque limiter plate and the bus body during production. That weak bond can reduce the clamp load on the steering gearbox bolts, which lets the bolts loosen. If the gearbox shifts out of position, steering effort can rise and the bus can become harder to control.
The warning sign is a bus that becomes difficult to steer. If the steering feel changes, the steering gearbox mounting bolts have loosened enough for the gearbox to move out of position.
Who's affected?
Covers both ZX5 and Catalyst buses across the 2015-2022 model years, all tied to the same steering gear mounting point.
| 2020 Proterra ZX5 | steering gear |
|---|---|
| 2021 Proterra ZX5 | steering gear |
| 2022 Proterra ZX5 | steering gear |
| 2017 Proterra Catalyst | steering gear |
| 2018 Proterra Catalyst | steering gear |
| 2019 Proterra Catalyst | steering gear |
| 2020 Proterra Catalyst | steering gear |
| 2021 Proterra Catalyst | steering gear |
| 2015 Proterra Catalyst | steering gear |
| 2016 Proterra Catalyst | steering gear |
| 2019 Proterra ZX5 | steering gear |
| 2015 Proterra ZX5 | steering gear |
| 2022 Proterra Catalyst | steering gear |
| 2016 Proterra ZX5 | steering gear |
| Units affected | 724 |
| Field incidents | NHTSA has logged no field incidents to date. |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific bus is included.
What's the safety risk?
A loose steering gearbox can cause loss of steering control and increase the risk of a crash. If the vehicle becomes difficult to steer, stop in a safe place and contact the dealer before continuing. The dealer installs added fasteners, new bolts, and a torque plate as needed. Repair is free at any franchised Proterra dealer.
What should I do?
- Check your VIN to confirm your 2015-2022 Proterra ZX5 or Catalyst bus is included in this recall.
- Contact a franchised Proterra dealer to schedule the free steering-gearbox fastener repair.
- Schedule the mechanical fastener, new bolt, and torque plate work that secures the steering gearbox to the bus body.
- Bring the recall notice if Proterra mailed one. If not, reference recall number 22V114 when you call.
- Limit service use until the repair is complete, and remove the bus from service if steering control changes.
What happens at the repair
At the dealer, a Proterra technician installs a mechanical fastener and new bolts on the steering gearbox. If the repair calls for it, the technician also installs a new torque plate. Parts and labor are free under recall 22V114. Proterra has a general reimbursement plan on file for owners who already paid for related steering gearbox or torque plate repairs before the recall notice. Contact Proterra customer service at 1-864-438-0000 with repair paperwork to ask how to claim those costs.
| Reimbursement | Reimbursement available |
|---|
Timeline
| February 28, 2022 | NHTSA published the recall |
|---|---|
| April 29, 2022 | Dealer notification began |
| April 29, 2022 | Dealer notification ended |
| April 29, 2022 | Interim owner notification (was planned for this date) |
| October 7, 2022 | Owner notification mailed |
Frequently asked questions
What is recall 22V114?
Recall 22V114 covers 724 certain 2015-2022 Proterra ZX5 and Catalyst buses with steering gearbox bolts that can loosen because the adhesive between the torque limiter plate and bus body is insufficient. A loose steering gearbox can cause loss of steering control. Proterra dealers will repair the steering gearbox hardware for free.
What should I do if my 2015-2022 Proterra ZX5 or Catalyst is on this recall?
Check your VIN to confirm whether your specific bus is included in recall 22V114. If it is, contact a Proterra dealer to schedule the repair. Reference recall number 22V114 when you call, and ask whether the bus should stay out of service until the steering gearbox hardware is repaired.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and Proterra's remedy states that dealers will install a mechanical fastener, new steering gearbox bolts, and a new torque plate as needed free of charge.
What is the safety risk?
The safety risk is loss of steering control. If the steering gearbox loosens, the driver can lose control of the bus, increasing the risk of a crash. The repair secures the steering gearbox with a mechanical fastener, new bolts, and a new torque plate when needed.
When were owners notified about recall 22V114?
Proterra mailed owner notification letters on October 7, 2022. If you own or operate a used Proterra bus and never received a letter, check your VIN and call Proterra customer service at 1-864-438-0000 or a Proterra dealer with recall number 22V114.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/22V114000 |
|---|---|
| Proterra customer service | 1-864-438-0000 |
| NHTSA recall # | 22V114 |
| NHTSA recall # (full) | 22V114000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →