Recall 20V546 affects 15 2018-2020 E-One Cyclone Ii and Typhoon ambulances for lower shock mount bracket defect. Repair is free at any franchised E-One dealer.
E-One is recalling 15 2018-2020 Cyclone Ii and Typhoon ambulances because the lower shock mount bracket can bind the U-bolts and break them, so the rear axle no longer stays secured. If the axle shifts sideways, the driver can lose control and crash; E-One dealers will complete the repair free of charge.
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What's wrong?
The rear lower shock mount bracket on 2018-2020 E-One Cyclone Ii and Typhoon ambulances supports the shock absorber at the rear suspension. The rear axle is also clamped to the leaf spring suspension by U-bolts, which must hold tight so the axle stays fixed in its proper position.
On affected ambulances, the bracket hole spacing created interference where the U-bolts pass through. That interference keeps the U-bolts from being tightened to the required torque, reducing the clamp force between the rear axle and suspension. With less clamp force, the U-bolts can bind and break, leaving the rear axle without the secure attachment it needs.
Operators can hear popping or creaking from the rear axle area when the axle and suspension move against each other. Those noises are warning signs that the axle-to-suspension interface is shifting, and the brackets and U-bolts need replacement with the U-bolts torqued to specification.
Who's affected?
Spans Cyclone Ii and Typhoon trucks across the 2018, 2019, and 2020 model years, with drive axle and rear suspension components included.
| 2018 E-One Cyclone Ii | rear suspension |
|---|---|
| 2020 E-One Typhoon | drive axle |
| 2020 E-One Typhoon | rear suspension |
| 2019 E-One Typhoon | drive axle |
| 2019 E-One Typhoon | rear suspension |
| 2020 E-One Cyclone Ii | drive axle |
| 2020 E-One Cyclone Ii | rear suspension |
| 2019 E-One Cyclone Ii | drive axle |
| 2019 E-One Cyclone Ii | rear suspension |
| 2018 E-One Typhoon | drive axle |
| 2018 E-One Typhoon | rear suspension |
| 2018 E-One Cyclone Ii | drive axle |
| Units affected | 15 |
| Field incidents | NHTSA has logged no field incidents to date. |
The year and model narrow the list, but the VIN decides. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
An unsecured rear axle can shift sideways, causing loss of vehicle control and increasing crash risk. Popping or creaking from the axle and suspension area is a warning sign that the interface is moving. Schedule the repair soon, and call the dealer before further use if you hear that noise. Repair is free at any franchised E-One dealer.
What should I do?
- Check your VIN to confirm your 2018-2020 E-One Cyclone Ii or Typhoon is included in this recall.
- Contact a franchised E-One dealer to schedule the free lower shock mount bracket replacement that prevents U-bolt binding and keeps the rear axle secured.
- Bring the recall notice if E-One mailed one. If not, reference recall number 20V546 when you call.
- Avoid unnecessary trips until the repair is complete.
- Ask the dealer about transport if the vehicle does not feel safe to drive.
What happens at the repair
At the dealer, an E-One technician replaces any lower shock mount brackets covered by campaign 20V546. The brackets sit at the rear suspension area, where the wrong bracket shape can let the U-bolts bind and break. Parts and labor are covered under the recall. E-One also has a general reimbursement plan on file for owners who already paid for this repair before the recall work. Bring repair paperwork and payment documentation to the service desk so they can explain the claim process.
| Reimbursement | Reimbursement available |
|---|
Timeline
| September 9, 2020 | NHTSA published the recall |
|---|---|
| September 14, 2020 | Dealer notification began |
| September 21, 2020 | Owner notification mailed |
| September 28, 2020 | Dealer notification ended |
| October 5, 2020 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 20V546?
Recall 20V546 covers 15 2018-2020 E-One Cyclone Ii and Typhoon ambulances with lower shock mount brackets that can bind the U-bolts and cause them to break. If the rear axle is no longer secured, it can shift sideways and cause loss of control. E-One dealers replace the affected brackets for free.
What should I do if my 2018-2020 E-One Cyclone Ii or Typhoon is on this recall?
Check your VIN to confirm your specific ambulance is included in recall 20V546. If it is, contact a franchised E-One dealer to schedule replacement of the affected lower shock mount brackets. Reference recall 20V546 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and E-One dealers replace the affected lower shock mount brackets free of charge. Owners can also contact E-One customer service at 1-888-237-1751 for recall scheduling support.
What is the safety risk?
The safety risk is loss of vehicle control. If the U-bolts bind and break, the rear axle can stop being secured and shift sideways while the ambulance is in use. E-One's free dealer repair replaces the affected lower shock mount brackets.
When did recall 20V546 begin?
E-One began this recall on September 21, 2020. Owners were notified, and the dealer repair is available now. If you operate or manage a 2018-2020 E-One Cyclone Ii or Typhoon ambulance, check the VIN before assuming the recall work was completed.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/20V546000 |
|---|---|
| E-One customer service | 1-888-237-1751 |
| NHTSA recall # | 20V546 |
| NHTSA recall # (full) | 20V546000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Owner Notice (PDF)
- Download Quarterly Report (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- 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 →