Recall 21V507 covers 52 2017-2020 Spartan Fire Metrostar and Gladiator vehicles for fuel-rail leaks. Repair will be free at Spartan Fire dealers once available.
Spartan Fire is recalling 52 2017-2020 Metrostar and Gladiator vehicles under recall 21V507 because a sealing washer in the high-pressure fuel rail assembly can fail to seat correctly, which lets fuel leak. Fuel near an ignition source increases fire risk, and the dealer repair will be free once available.
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What's wrong?
The fuel rail on 2017-2020 Spartan Fire Metrostar and Gladiator vehicles is part of the diesel injection system. It stores and delivers high-pressure diesel fuel from the engine's fuel system to the injectors, so each cylinder gets the fuel it needs at the right time. The rail depends on tight seals at its end bores to keep fuel contained under pressure.
On the affected Cummins L9 and ISX12 engines, the pilot boreholes for the rail end sealing washer can be undersized. That prevents the washer from sitting flat and taking the load needed to seal the joint. In service, the joint can loosen enough for high-pressure fuel to escape from the rail assembly.
An operator can see diesel fuel, smell diesel fuel, or notice the check engine lamp. Treat those signs as a reason to stop using the vehicle and arrange service before the leak gets worse.
Who's affected?
Metrostar and Gladiator fire trucks share the same diesel fuel rail component across the 2017-2020 scope.
| 2019 Spartan Fire Metrostar | fuel system |
|---|---|
| 2018 Spartan Fire Metrostar | fuel system |
| 2020 Spartan Fire Metrostar | fuel system |
| 2017 Spartan Fire Metrostar | fuel system |
| 2020 Spartan Fire Gladiator | fuel system |
| 2019 Spartan Fire Gladiator | fuel system |
| 2018 Spartan Fire Gladiator | fuel system |
| 2017 Spartan Fire Gladiator | fuel system |
| Units affected | 52 |
| 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 truck is included.
What's the safety risk?
A diesel fuel leak near an ignition source increases the risk of a fire. Warning signs include visible diesel fuel, diesel odor, or a check engine lamp. If you notice fuel, stop using the vehicle and call the dealer for guidance. Repair will be free at any franchised Spartan Fire dealer once available.
What should I do?
- Check your VIN to confirm your 2017-2020 Spartan Fire Metrostar or Gladiator is included in this recall.
- Watch for Spartan Fire's owner notice before scheduling the fuel-rail inspection and repair.
- Call Spartan Fire customer service at 1-715-754-5261 with questions, and reference recall number 21V507 when you call.
- Contact a franchised Spartan Fire dealer once scheduling opens for the free fuel-rail inspection and replacement that fixes the high-pressure fuel leak risk.
- Avoid parking near ignition sources if you smell fuel or see a fuel leak, and have the vehicle inspected before further service use.
What happens at the repair
The dealer repair is still under development, so do not treat this as a repair that can be scheduled now. Once the final repair opens, a Spartan Fire technician will inspect the rail threads and fuel lines, then replace the fuel rail when the inspection shows it is needed. Parts and labor will be free under the recall once the remedy is available. Spartan Fire has a general reimbursement plan on file for this campaign. If you already paid for a related fuel rail or fuel line repair before the recall notice, keep your repair paperwork and ask customer service how to submit documentation.
| Reimbursement | Reimbursement available |
|---|
Timeline
| July 2, 2021 | NHTSA published the recall |
|---|---|
| July 7, 2021 | Interim owner notification (was planned for this date) |
| July 9, 2021 | Dealer notification began |
| July 9, 2021 | Dealer notification ended |
| July 26, 2021 | Owner notification mailed |
Frequently asked questions
What is recall 21V507?
Recall 21V507 covers 52 2017-2020 Spartan Fire Metrostar and Gladiator vehicles with a high-pressure fuel rail sealing-washer issue. If the washer does not seat correctly, the fuel rail assembly can leak. Dealers will inspect the rail threads and fuel lines, then replace the rail as needed for free.
What should I do if my 2017-2020 Spartan Fire Metrostar or Gladiator is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V507. If it is, contact a franchised Spartan Fire dealer or Marion Body Works customer service at 1-715-754-5261. Reference Marion Body Works recall number 21V-032 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and the remedy for recall 21V507 says dealers will inspect the rail threads and fuel lines, then replace the fuel rail as necessary, free of charge.
What is the safety risk in recall 21V507?
The safety risk is fire. Recall 21V507 says a high-pressure fuel rail assembly can leak if the sealing washer does not seat correctly in the pilot boreholes. A fuel leak near an ignition source increases the risk of a fire.
When were owners notified about recall 21V507?
Owner notification letters were mailed on July 26, 2021. If you own a 2017-2020 Spartan Fire Metrostar or Gladiator and never received a letter, check your VIN and call a franchised Spartan Fire dealer or Marion Body Works customer service with recall number 21V-032.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V507000 |
|---|---|
| Spartan Fire customer service | 1-715-754-5261 |
| NHTSA recall # | 21V507 |
| NHTSA recall # (full) | 21V507000 |
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 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →