Recall 16V931 affects 451 2015-2016 Gillig Low Floor CNG buses because gas detection panels can be disabled without warning. Amerex replaces the panel free.
Gillig is recalling 451 2015-2016 Low Floor CNG transit buses because the Amerex SafetyNet fire suppression panel can leave gas detection electronics disabled without warning the driver. A disabled gas detection system can fail to alert the driver to a natural gas leak, increasing the risk of asphyxiation, fire, or explosion; Gillig dealers will complete the repair free of charge.
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What's wrong?
The Amerex SafetyNet fire suppression system on 2015-2016 Gillig Low Floor CNG buses includes an operator display panel/controller and gas detection electronics. The gas detection side is supposed to stay active and report a malfunction through the operator display panel when it is not working. On a CNG transit bus, that warning path matters because the system is tied to fuel system safety.
On affected buses, a firmware error in certain display panel/controller units prevents the gas detection electronics from rebooting after a short term power supply loss. Once that happens, the gas detection side stays disabled instead of returning to service. The operator display panel does not show a malfunction, so the driver is not told that this part of the system is offline.
The warning sign is the absence of a warning. No indication or fault code appears on the operator display panel after the gas detection electronics have been disabled.
Who's affected?
Included buses span the 2015 and 2016 model years, with the same fuel system component listed for both.
| 2016 Gillig Low Floor | fuel system |
|---|---|
| 2015 Gillig Low Floor | fuel system |
| Units affected | 451 |
| Field incidents | NHTSA has logged 2 field incidents to date. |
A matching year and model does not confirm inclusion. Check your VIN to confirm whether your specific bus is included.
What's the safety risk?
After a short power loss, the gas detection electronics can be disabled without a fault code on the Operator Display Panel. The driver can miss a methane leak warning. That raises the risk of asphyxiation, fire, or explosion. Schedule the recall repair soon. Repair is free at any franchised Gillig dealer.
What should I do?
- Check your VIN to confirm your 2015-2016 Gillig Low Floor bus is included in this recall.
- Contact a franchised Gillig dealer to schedule the free Amerex display panel/controller replacement that restores warning for disabled gas detection electronics.
- Bring the recall notice if Gillig mailed one. If not, reference recall number 16V931 when you call.
- Avoid operating the CNG bus until the repair is complete if gas detection electronics show a fault, are disabled, or cannot confirm methane-leak detection is active.
- Call Gillig customer service at 1-800-735-1500 with questions about the Amerex representative replacement.
What happens at the repair
At the dealer or fleet service location, Amerex representatives replace the Operator Display Panel and Controller units in the SafetyNet fire suppression system. The repair replaces the display and control hardware tied to the gas detection electronics, so the system can warn the operator if it has a malfunction. Parts and labor are covered under the recall. Gillig has a general reimbursement plan on file, so owners who already paid for this same repair should ask Gillig customer service how to submit documented expenses.
| Reimbursement | Reimbursement available |
|---|
Timeline
| December 23, 2016 | NHTSA published the recall |
|---|---|
| December 29, 2016 | Dealer notification began |
| December 29, 2016 | Interim owner notification (was planned for this date) |
| January 11, 2017 | Dealer notification ended |
| January 20, 2017 | Owner notification mailed |
Frequently asked questions
What is recall 16V931?
Recall 16V931 covers 451 2015-2016 Gillig Low Floor CNG transit buses with Amerex SafetyNet fire suppression display panel/controller units. The gas detection electronics can be disabled without warning the operator, increasing the risk of asphyxiation, fire, or explosion.
What should I do if my 2015-2016 Gillig Low Floor is on this recall?
Check your VIN to confirm your specific bus is included in recall 16V931. If it is, contact a franchised Gillig service location or Gillig customer service at 1-800-735-1500 to arrange replacement of the Operator Display Panel/Controller.
Is the recall repair free?
Yes. Federal recall law requires the recall repair to be performed at no cost, and Gillig says Amerex representatives will replace the affected Operator Display Panel/Controllers free of charge.
What is the safety risk?
The safety risk is that the fire suppression system can fail to show a natural gas, or methane, leak. If the gas detection electronics are disabled, the driver will not receive a fault code, increasing the risk of asphyxiation, fire, or explosion.
What warning signs should I watch for?
There is no warning sign from the affected controller when the gas detection electronics are disabled. That is the defect in recall 16V931. The driver does not receive a fault code, so VIN confirmation and the free controller replacement are the practical next steps.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/16V931000 |
|---|---|
| Gillig customer service | 1-800-735-1500 |
| NHTSA recall # | 16V931 |
| NHTSA recall # (full) | 16V931000 |
Source documents
-
Download Misc. Document (PDF) - Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 31, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →