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Campaign 21V332 Posted May 11, 2021 915 units

2017-2021 E-One Recall 21V332: Fuel Rail Leak

RN
Reviewed by the RecallNotify editorial team
Published May 23, 2026

Recall 21V332 affects 915 2017-2021 E-One vehicles for high-pressure fuel rail leaks. Repair is free at any franchised E-One dealer.

E-One is recalling 915 2017-2021 Cyclone Ii, Typhoon N, Cyclone N, Quest Ii, and Typhoon vehicles 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 E-One dealers will complete the recall repair free of charge.

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What's wrong?

The high pressure common fuel rail on the 2017-2021 E-One Cyclone Ii, Cyclone N, Quest Ii, Typhoon, and Typhoon N feeds diesel fuel to the engine injectors. It holds fuel under high pressure so each injector receives a steady supply at the right time. The rail depends on sealing washers at the rail ends to keep that pressure contained.

On affected vehicles, the sealing washer does not seat correctly in the pilot bore holes at the rail end. Cummins identified rail end sealing bores with undersized pilot bores, which keeps the washer from clamping the joint with enough load. In service, that weak seal lets diesel fuel escape from the high pressure fuel rail assembly.

A visible diesel leak, diesel odor, or illuminated check engine lamp is the warning sign an operator can notice. Treat any fuel smell or visible fuel near the engine as a reason to stop and arrange service.

Who's affected?

Spans 5 E-One fire-truck model lines from 2017-2021, all tied to the same high-pressure common fuel rail.

2019 E-One Typhoon N fuel system
2021 E-One Typhoon N fuel system
2018 E-One Typhoon N fuel system
2020 E-One Cyclone Ii fuel system
2019 E-One Cyclone Ii fuel system
Units affected915
Field incidentsNHTSA 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. Treat diesel odor, visible fuel, or a check engine lamp as a reason to park safely and schedule service soon. Repair is free at any franchised E-One dealer.

What should I do?

  1. Check your VIN to confirm your 2017-2021 E-One Typhoon N, Cyclone Ii, Cyclone N, Quest Ii, or Typhoon is included in this recall.
  2. Contact a franchised E-One dealer to schedule the free fuel-rail inspection and replacement that fixes the sealing-washer leak risk.
  3. Bring the owner letter if E-One sent one. Reference recall number 21V332 when you call.
  4. Keep ignition sources away from the vehicle until the fuel-rail leak repair is complete.

What happens at the repair

At the dealer, an E-One technician inspects the high pressure fuel rail assembly and replaces the rail if needed. The inspection, replacement rail, and labor are free under the recall. E-One's recall specific reimbursement plan applies to units not covered by the manufacturer's limited warranty. If you've already paid for a related fuel rail repair, ask E-One customer service or the service desk how to submit documentation under that plan.

ReimbursementReimbursement available

Timeline

May 11, 2021 NHTSA published the recall
May 25, 2021 Dealer notification began
May 28, 2021 Owner notification mailed
June 8, 2021 Dealer notification ended
June 18, 2021 Interim owner notification (was planned for this date)

Frequently asked questions

What is recall 21V332?

Recall 21V332 covers 915 2017-2021 E-One Typhoon N, Cyclone Ii, Cyclone N, Quest Ii, and Typhoon vehicles with a high pressure fuel rail sealing washer that can seat incorrectly and let fuel leak. E-One dealers will inspect the rail and replace it for free.

What should I do if my 2017-2021 E-One Typhoon N, Cyclone Ii, Cyclone N, Quest Ii, or Typhoon is on this recall?

Check your VIN to confirm your specific vehicle is included in recall 21V332. If it is, contact a franchised E-One dealer to schedule the fuel rail inspection and replacement. Reference recall number 21V332 when you call. The repair is free.

Does the recall repair cost anything?

No. Federal recall law requires manufacturers to perform recall repairs at no cost, and E-One will inspect and replace the affected high pressure fuel rail assembly free of charge at a franchised E-One dealer.

What is the safety risk in recall 21V332?

The safety risk is fire. A sealing washer that does not seat correctly can allow the high pressure fuel rail assembly to leak fuel. If that fuel reaches an ignition source, the fire risk increases. The dealer repair is free.

What if I bought my E-One vehicle used?

The free recall repair still applies. Recall coverage follows the vehicle, not the first owner. Check your VIN to confirm whether your 2017-2021 E-One vehicle is included, then call an E-One dealer or E-One customer service at 1-352-237-1122.

More information

NHTSA campaign pagenhtsa.gov/vehicle-recalls/21V332000
E-One customer service1-352-237-1122
NHTSA recall #21V332
NHTSA recall # (full)21V332000

Source documents

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 →