Recall 21V630 affects 48 2017-2021 Custom Fire Spartan Gladiator and Spartan Metrostar vehicles for fuel rail leaks. Repair is free at any franchised Custom Fire dealer.
Custom Fire is recalling 48 2017-2021 Spartan Gladiator and Spartan Metrostar emergency vehicles equipped with Cummins L9 diesel engines because a sealing washer in the high pressure fuel rail assembly can allow fuel to leak. A fuel leak near an ignition source increases the risk of a fire, and the Custom Fire dealer repair is free.
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What's wrong?
The Cummins L9 diesel engine in these Custom Fire emergency vehicles uses a high pressure fuel rail as part of the diesel injection system. The rail holds diesel under pressure and sends it to the injectors, which meter fuel into the engine so it runs correctly.
In recalled 2017-2021 Custom Fire Spartan Gladiator and Spartan Metrostar emergency vehicles, a sealing washer in the pilot boreholes does not seat correctly. That poor seal lets diesel escape from the high pressure fuel rail assembly instead of staying contained inside the fuel system.
The warning signs are visible diesel fuel, diesel odor, or an illuminated check engine lamp. If an operator notices fuel around the engine area or smells diesel during use, that is the sign described for this recall.
Who's affected?
Covers Spartan Gladiator and Spartan Metrostar fire trucks from 2017 through 2021, all tied to the diesel fuel rail system.
| 2017 Custom Fire Spartan Gladiator | fuel system |
|---|---|
| 2019 Custom Fire Spartan Metrostar | fuel system |
| 2017 Custom Fire Spartan Metrostar | fuel system |
| 2019 Custom Fire Spartan Gladiator | fuel system |
| 2020 Custom Fire Spartan Metrostar | fuel system |
| 2021 Custom Fire Spartan Metrostar | fuel system |
| 2018 Custom Fire Spartan Gladiator | fuel system |
| 2020 Custom Fire Spartan Gladiator | fuel system |
| 2021 Custom Fire Spartan Gladiator | fuel system |
| 2018 Custom Fire Spartan Metrostar | fuel system |
| Units affected | 48 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether this recall applies to your specific truck.
What's the safety risk?
A fuel leak near an ignition source increases the risk of a fire. If you see or smell diesel fuel, or the check engine lamp comes on, stop using the vehicle and call the dealer before the next trip. Repair is free at any franchised Custom Fire dealer.
What should I do?
- Check your VIN to confirm your 2017-2021 Custom Fire Spartan Gladiator or Spartan Metrostar is included in this recall.
- Contact a franchised Custom Fire dealer to schedule the free fuel-rail inspection and repair for the high pressure fuel rail leak risk.
- Bring the recall notice if you have it. If not, reference recall number 21V630 when you call.
- Call Custom Fire customer service at 1-715-294-2555 with questions about scheduling or repair status.
- Limit operation until the inspection is complete, and keep the vehicle away from ignition sources if you see or smell fuel.
What happens at the repair
At the dealer, a Custom Fire technician inspects the fuel rail threads and fuel lines for the high pressure fuel rail leak condition. If the rail needs replacement, the technician replaces it under the recall. The inspection, replacement parts, and labor are free. Custom Fire lists a general reimbursement plan for owners who paid for this repair before the recall notice. Bring repair paperwork and payment records so the service desk can explain the claim process.
| Reimbursement | Reimbursement available |
|---|
Timeline
| August 8, 2021 | Owner notification mailed |
|---|---|
| August 9, 2021 | NHTSA published the recall |
| August 9, 2021 | Dealer notification began |
| August 9, 2021 | Interim owner notification (was planned for this date) |
| August 13, 2021 | Dealer notification ended |
Frequently asked questions
What is recall 21V630?
Recall 21V630 covers 48 2017-2021 Custom Fire Spartan Gladiator and Spartan Metrostar emergency vehicles with Cummins L9 diesel engines. The high-pressure fuel rail assembly can leak because a sealing washer does not seat correctly. Cummins will inspect the rail threads and fuel lines, and replace the rail as needed for free.
What should I do if my 2017-2021 Custom Fire Spartan Gladiator or Spartan Metrostar is on this recall?
Check your VIN to confirm your specific emergency vehicle is included in recall 21V630. If it is, contact Custom Fire customer service at 1-715-294-2555 to arrange the Cummins inspection and any needed fuel rail replacement. Reference recall number 21V630 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. For recall 21V630, Cummins will inspect the rail threads and fuel lines, and replace the fuel rail as necessary, free of charge.
What is the safety risk?
The safety risk is fire. A leaking high-pressure fuel rail can release diesel fuel, and a fuel leak in the presence of an ignition source increases the risk of a fire. If your VIN is included, arrange the free Cummins inspection before returning the vehicle to regular service.
When were owners notified about recall 21V630?
Owner notification letters were mailed on August 8, 2021. Used-vehicle ownership, fleet transfers, or address changes can keep a notice from reaching the current operator, so the VIN check is still the right way to confirm whether a specific Spartan Gladiator or Spartan Metrostar is included.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V630000 |
|---|---|
| Custom Fire customer service | 1-715-294-2555 |
| NHTSA recall # | 21V630 |
| NHTSA recall # (full) | 21V630000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notification Letter (PDF)
- Download Owner Notice (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 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →