Recall 20V239 covers 275 2018-2020 Gillig Low Floor buses with CNG pressure relief devices that fail under heat. Repair is free through Gillig.
Gillig is recalling 275 2018-2020 Low Floor transit buses powered by compressed natural gas because a pressure relief device on the CNG fuel system can fail to vent during heat exposure. If the system ruptures, injury risk increases; Gillig dealers will replace the pressure relief device free of charge.
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What's wrong?
The pressure relief device on a 2018-2020 Gillig Low Floor CNG bus is a safety valve in the compressed natural gas fuel system. Its job is to open when heat reaches the fuel storage system, so pressure vents before the tank assembly is damaged.
On the affected buses, certain EMER-supplied PRDs installed in Agility CNG fuel systems do not meet specification. In the defect condition described in NHTSA campaign 20V239, the device does not vent the system when exposed to heat. Pressure can build inside the CNG fuel system and the system can rupture. Agility is still investigating the root cause.
There is no warning sign before failure. A driver or maintenance crew should not expect a normal driving symptom that confirms the PRD has failed before heat and pressure create the hazard.
Who's affected?
Covers Low Floor buses across the 2018, 2019, and 2020 model years, all tied to the same fuel system pressure relief device.
| 2019 Gillig Low Floor | fuel system |
|---|---|
| 2020 Gillig Low Floor | fuel system |
| 2018 Gillig Low Floor | fuel system |
| Units affected | 275 |
| 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 fuel system rupture after heat exposure raises the risk of injury. If your VIN is included, schedule the recall repair soon and ask Gillig what service limits apply until the PRDs are replaced. Repair is free at any franchised Gillig dealer.
What should I do?
- Check your VIN to confirm your 2018-2020 Gillig Low Floor bus is included in this recall.
- Contact a franchised Gillig dealer to schedule the free PRD replacement that helps the CNG fuel system vent when exposed to heat.
- Bring the recall notice if Gillig has mailed one. If not, reference recall number 20V239 when you call.
- Avoid operating or parking the bus near heat sources until the PRD replacement is complete.
What happens at the repair
At the dealer, a Gillig technician works with Agility to replace the thermally activated pressure relief devices on the CNG fuel system. The replacement is available now, and parts and labor are covered under the recall. Out-of-pocket repairs already paid are handled through the existing manufacturer's warranty, not through a separate reimbursement program, since the subject products remain under warranty. Ask the service desk how warranty coverage applies if you have prior repair paperwork for the PRDs.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| April 29, 2020 | NHTSA published the recall |
|---|---|
| May 15, 2020 | Owner notification mailed |
| May 25, 2020 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| May 25, 2020 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 20V239?
Recall 20V239 covers 275 2018-2020 Gillig Low Floor transit buses powered by compressed natural gas. The pressure relief device on the CNG fuel system can fail to vent during heat exposure, which can lead to fuel system rupture and increased injury risk.
What should I do if my 2018-2020 Gillig Low Floor is on this recall?
Check your VIN to confirm the bus is included in recall 20V239. If it is, contact Gillig or Agility to arrange the pressure relief device replacement. Reference recall 20V239 when you call. The replacement is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Gillig will work with Agility to replace the affected pressure relief devices free of charge.
What is the safety risk?
The safety risk is fuel system rupture during heat exposure. The CNG pressure relief device is supposed to vent the system under heat. If it does not vent, the system can rupture, increasing injury risk. The fix is replacement of the affected pressure relief devices.
When did the recall repair begin?
The recall repair began May 15, 2020. For an included bus, contact Agility customer service at 1-949-267-7745 or Gillig customer service at 1-800-735-1500 and ask for the free pressure relief device replacement under recall 20V239.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/20V239000 |
|---|---|
| Gillig customer service | 1-949-267-7745 |
| NHTSA recall # | 20V239 |
| NHTSA recall # (full) | 20V239000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →