Recall 21V366 affects 1,780 2018-2021 International Durastar, Workstar, Hv, Mv, and Recb vehicles for fuel rail leaks. Repair is free at any franchised International dealer.
International is recalling 1,780 2018-2021 Durastar, Workstar, Hv, Mv, and Recb vehicles because the sealing washer in the high pressure fuel rail assembly can seat incorrectly and allow fuel to leak. A fuel leak near an ignition source raises the risk of a fire, and International dealers will complete the recall repair free of charge.
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What's wrong?
The high pressure fuel rail assembly on these 2018-2021 International Durastar, Workstar, Hv, Mv, and Recb trucks and buses is part of the diesel fuel injection system. It stores pressurized diesel fuel and feeds it to the injectors so the engine gets the right amount of fuel at the right time. A sealing washer helps close the end of the rail so fuel stays inside the assembly.
On affected vehicles, the end sealing bores in the fuel rail were made with pilot bores that are too small for the washer. The washer does not seat correctly, so the joint does not get enough clamping load to stay sealed in service. That creates a path for diesel fuel to leak from the high pressure fuel rail assembly.
An operator can see or smell diesel fuel before the problem is found. The check engine lamp can also turn on in some vehicles.
Who's affected?
Scope spans truck and bus configurations from 2018 through 2021, all tied to the same high-pressure fuel rail assembly.
| 2018 International Durastar | fuel system |
|---|---|
| 2018 International Workstar | fuel system |
| 2019 International Workstar | fuel system |
| 2019 International Durastar | fuel system |
| 2019 International Hv | fuel system |
| 2019 International Mv | fuel system |
| 2020 International Hv | fuel system |
| 2020 International Mv | fuel system |
| 2021 International Hv | fuel system |
| 2019 Ic Bus Recb | fuel system |
| 2021 Ic Bus Recb | fuel system |
| 2021 International Mv | fuel system |
| 2020 Ic Bus Recb | fuel system |
| Units affected | 1,780 |
| 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 vehicle.
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 turns on, stop in a safe place and call an International dealer before continuing. Repair is free at any franchised International dealer.
What should I do?
- Check your VIN to confirm your 2018-2021 International Durastar, Workstar, Hv, Mv, or Recb is included in this recall.
- Contact a franchised International dealer to schedule the free high-pressure fuel rail inspection and rail replacement if the threads are damaged.
- Bring the owner letter if you have it, or reference recall number 21V366 when you call.
- Call International customer service at 1-800-448-7825 with questions about scheduling or repair coverage.
- Avoid driving if you smell fuel or see a leak, and keep the vehicle away from ignition sources until a dealer inspects it.
What happens at the repair
At the dealer, an International technician inspects the rail threads tied to the high pressure fuel rail assembly. If the rail threads are damaged or the sealing washer cannot seat correctly, the technician replaces the rail. Parts and labor are covered under the recall. Because International uses its standard reimbursement plan for this campaign, owners who already paid for a related fuel rail repair should bring repair orders and payment documentation to the dealer service desk or contact International customer service about reimbursement.
| Reimbursement | Reimbursement available |
|---|
Timeline
| May 19, 2021 | NHTSA published the recall |
|---|---|
| June 19, 2021 | Dealer notification began |
| June 19, 2021 | Dealer notification ended |
| June 19, 2021 | Interim owner notification (was planned for this date) |
| June 21, 2021 | Owner notification mailed |
Frequently asked questions
What is recall 21V366?
Recall 21V366 covers 1,780 2018-2021 International Durastar, Workstar, Hv, Mv, and Recb vehicles with a high-pressure fuel rail sealing issue. The washer can seat incorrectly, allowing a diesel fuel leak. Dealers will inspect the rail threads and replace the rail as needed for free.
What should I do if my 2018-2021 International Durastar, Workstar, Hv, Mv, or Recb is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V366. If it is, contact a franchised International dealer to schedule the fuel rail inspection. Reference recall number 21V366 when you call. The dealer repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and Navistar's remedy says dealers will inspect the rail threads and replace the rail as needed free of charge at a franchised International dealer.
What is the safety risk?
The safety risk is fire. If the sealing washer does not seat correctly, the high-pressure fuel rail assembly can leak diesel fuel. A fuel leak in the presence of an ignition source increases the risk of a fire.
When were owners notified about recall 21V366?
Navistar mailed owner notification letters on June 21, 2021. If you bought the vehicle used or never received a letter, check your VIN and contact an International dealer or Navistar customer service at 1-800-448-7825 with recall number 21V366.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V366000 |
|---|---|
| International customer service | 1-800-448-7825 |
| NHTSA recall # | 21V366 |
| NHTSA recall # (full) | 21V366000 |
Source documents
-
Download Owner Notification Letter (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 →