Recall 21V352 covers 4,428 2017-2020 Gillig Low Floor buses for a fuel rail leak. Repair is free at any franchised Gillig dealer.
Gillig is recalling 4,428 2017-2020 Low Floor vehicles because a sealing washer can sit incorrectly in the pilot bore holes and let the high pressure fuel rail assembly leak fuel. A fuel leak near an ignition source increases the risk of a fire, and Gillig dealers will complete the repair free of charge.
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What's wrong?
The high pressure fuel rail assembly on 2017-2020 Gillig Low Floor buses is part of the Cummins L9 diesel fuel injection system. It stores fuel under high pressure and feeds the injectors so the engine receives the right amount of diesel at the right time. A sealing washer at the rail end helps keep that pressurized fuel contained.
On affected buses, the pilot bore for the sealing washer is undersized. That means the washer does not sit fully in place, so the joint does not get enough clamping load to stay sealed during service. As the engine runs and fuel pressure cycles through the rail, the high pressure fuel rail assembly can leak.
There is no warning sign before failure. A fuel smell, visible wetness around the engine, or fuel on nearby parts means the bus needs service attention, but the recall filing does not identify an advance warning before the leak starts.
Who's affected?
Spans four model years, with the same high pressure fuel rail assembly listed for each Low Floor bus.
| 2020 Gillig Low Floor | fuel system |
|---|---|
| 2019 Gillig Low Floor | fuel system |
| 2018 Gillig Low Floor | fuel system |
| 2017 Gillig Low Floor | fuel system |
| Units affected | 4,428 |
| 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 leak near an ignition source increases the risk of a fire. If you suspect leaking fuel, park safely and call the dealer before moving the bus again. Schedule the recall inspection soon, because Gillig must inspect the rail threads. Repair is free at any franchised Gillig dealer.
What should I do?
- Check your VIN to confirm your 2017-2020 Gillig Low Floor is included in this recall.
- Contact a franchised Gillig dealer to schedule the free fuel-rail thread inspection and rail replacement if needed.
- Bring the recall notice if Gillig mailed one, and reference recall number 21V352 when you call.
- Avoid operating the bus if you smell diesel fuel or see leaking fuel; contact Gillig before moving it.
What happens at the repair
At the dealer, a Gillig technician inspects the high pressure fuel rail threads and checks whether the sealing washer issue has damaged or compromised the rail. The technician replaces the rail as needed, with parts and labor covered under the recall. For prior out-of-pocket fuel-rail repair costs on units not covered by the manufacturer's limited warranty, Cummins administers the reimbursement process through the Cummins Recall Portal. Submit the repair documentation requested there so the claim can be reviewed under the campaign plan.
| Reimbursement | Reimbursement available |
|---|
Timeline
| May 14, 2021 | NHTSA published the recall |
|---|---|
| July 13, 2021 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| July 13, 2021 | Interim owner notification (was planned for this date) |
| August 27, 2021 | Owner notification mailed |
Frequently asked questions
What is recall 21V352?
Recall 21V352 covers 4,428 2017-2020 Gillig Low Floor buses with high pressure fuel rail assemblies where the sealing washer does not seat correctly in the pilot bore holes. That defect allows fuel to leak. Gillig will inspect the rail threads and replace the rail for free.
What should I do if my 2017-2020 Gillig Low Floor is on this recall?
Check your VIN to confirm your specific bus is included in recall 21V352. If it is, contact Gillig customer service or a franchised Gillig service location to schedule the fuel rail inspection. Reference recall 21V352 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Gillig will inspect the rail threads and replace the rail as needed free of charge for vehicles included in recall 21V352.
Is it safe to drive my Gillig Low Floor before the fuel rail repair?
This recall does not include a do-not-drive order. The defect involves fuel leaking near an ignition source, which increases the risk of fire. Check your VIN, then ask Gillig customer service or the servicing dealer for handling guidance before the bus stays in service.
When were owners notified about recall 21V352?
Gillig mailed owner notification letters on August 27, 2021. If you bought the bus used or never received a letter, the VIN still decides whether the recall applies. Check your VIN and reference recall 21V352 when contacting Gillig customer service.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V352000 |
|---|---|
| Gillig customer service | 1-510-264-5073 |
| NHTSA recall # | 21V352 |
| NHTSA recall # (full) | 21V352000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Report (PDF)
- Download Owner Notification Letter (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 →