Recall 21V367 affects 933 2019-2021 Ic Bus Resb school buses for a high-pressure fuel rail leak. Repair is free at any franchised Ic Bus dealer.
Ic Bus is recalling 933 2019-2021 Resb school buses because a sealing washer in the high pressure fuel rail assembly can seat incorrectly and let fuel leak. A fuel leak near an ignition source increases the risk of a fire, and Ic Bus dealers will complete the recall repair free of charge.
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What's wrong?
The high-pressure fuel rail assembly on 2019-2021 Ic Bus Resb school buses feeds diesel fuel to the engine's injectors. It stores fuel under pressure and sends it through the injection system at the right moment for combustion. The rail depends on small sealing washers seating flat in the end bores so the joint stays sealed while the engine runs.
On affected buses, the pilot bores for those sealing washers were undersized on certain Cummins ISL engines. That means the washer does not sit correctly in the bore. Without the right clamp load on the joint, the end of the fuel rail can lose its seal in service and diesel fuel can leak from the rail assembly.
The warning signs are practical and visible: the operator can see diesel fuel or smell it around the bus. The check engine lamp can also illuminate. Treat those signs as a reason to stop using the bus and contact an Ic Bus dealer.
Who's affected?
Covers the 2019, 2020, and 2021 model years, all tied to the same high-pressure fuel rail assembly.
| 2021 Ic Bus Resb | fuel system |
|---|---|
| 2019 Ic Bus Resb | fuel system |
| 2020 Ic Bus Resb | fuel system |
| Units affected | 933 |
| 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 your specific bus is included.
What's the safety risk?
A fuel leak near an ignition source increases the risk of a fire. Watch for diesel smell, visible fuel, or a check engine lamp, and schedule the inspection soon if your VIN is included. Avoid operating the bus if fuel is present. Repair is free at any franchised Ic Bus dealer.
What should I do?
- Check your VIN to confirm your 2019-2021 Ic Bus Resb is included in this recall.
- Contact a franchised Ic Bus dealer to schedule the free fuel-rail inspection and any rail replacement needed to stop the high-pressure fuel rail leak.
- Bring the recall notice if you have it, and reference recall number 21V367 when you call.
- Avoid operating the bus if you see or smell fuel; contact the dealer before driving again.
- Call Ic Bus customer service at 1-800-448-7825 with questions about the repair.
What happens at the repair
At the dealer, an Ic Bus technician inspects the high pressure fuel rail threads and checks whether the sealing washer can seat correctly in the pilot bore holes. If the rail threads are damaged or the washer cannot seat correctly, the technician replaces the rail. The recall repair is free, with parts and labor covered. Because the remedy is available, schedule service with an Ic Bus dealer and ask the service desk to confirm that campaign 21V367 is open for your VIN.
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 21V367?
Recall 21V367 covers 933 2019-2021 Ic Bus Resb school buses with a high-pressure fuel rail sealing washer that can fail to seat correctly, allowing fuel to leak. A fuel leak near an ignition source increases fire risk. Dealers will inspect the rail threads and replace the rail as needed for free.
What should I do if my 2019-2021 Ic Bus Resb is on this recall?
Check your VIN to confirm whether your specific bus is included in recall 21V367. If it is, contact a franchised Ic Bus dealer to schedule the fuel rail inspection. The dealer will replace the rail as needed at no charge. Reference recall 21V367 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. For recall 21V367, the dealer inspects the high-pressure fuel rail threads and replaces the rail as needed free of charge.
What is the safety risk?
The safety risk is fire. The sealing washer in the high-pressure fuel rail assembly can fail to seat correctly, allowing fuel to leak. If leaked fuel reaches an ignition source, the risk of a fire increases.
When were owners notified about recall 21V367?
Owner notification letters were mailed on June 21, 2021. If you own or operate a 2019-2021 Ic Bus Resb and never received a letter, check your VIN and call an Ic Bus dealer with recall 21V367.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V367000 |
|---|---|
| Ic Bus customer service | 1-800-448-7825 |
| NHTSA recall # | 21V367 |
| NHTSA recall # (full) | 21V367000 |
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 →