Recall 22V870 affects 5,645 2023 Ic Bus EV, Cesb, and Resb buses for loose critical fasteners. Free repair at any franchised Ic Bus dealer.
Ic Bus is recalling 5,645 2023 EV, Cesb, and Resb buses because hex flange lock nuts in the steering and suspension joints were improperly heat treated and can lose tension over time. That loss of tension can cause steering instability and increase the risk of a crash; Ic Bus dealers will complete the free repair.
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What's wrong?
The hex flange lock nuts on the 2023 Ic Bus EV, Cesb, and Resb are critical fasteners in the suspension and steering joints. A flange lock nut is a nut with a built-in wider base and locking shape that helps clamp parts together and hold tension while the bus moves, turns, and carries load.
On affected buses, some of these nuts were not heat treated correctly. The supplier's furnace controls did not keep the nut surface hardness consistent, and worn tooling contributed to threads that were formed incorrectly. A nut that is too soft or has damaged thread shape can strip during assembly or slowly lose clamping force after the bus is in service. That loss of tension lets a steering or suspension joint feel less secure than designed.
The warning sign Navistar identified is a general loose feeling while driving. If the bus starts to feel loose or less settled through the steering or suspension, treat that as the sign to have the dealer inspect the affected fasteners.
Who's affected?
Covers EV, Cesb, and Resb bus lines, with suspension and steering fasteners listed separately.
| 2023 Ic Bus EV | suspension component |
|---|---|
| 2023 Ic Bus EV | steering system |
| 2023 Ic Bus Cesb | suspension component |
| 2023 Ic Bus Cesb | steering system |
| 2023 Ic Bus Resb | suspension component |
| 2023 Ic Bus Resb | steering system |
| Units affected | 5,645 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching 2023 Ic Bus EV, Cesb, or Resb bus does not guarantee inclusion. Check your VIN to confirm whether your specific bus is included.
What's the safety risk?
Loose steering or suspension joints can make the bus feel unstable and increase the risk of a crash. A loose feeling while driving is the warning sign named for this recall. If you feel it, pull over when safe and call the dealer. Repair is free at any franchised Ic Bus dealer.
What should I do?
- Check your VIN to confirm your 2023 Ic Bus EV, Cesb, or Resb is included in this recall.
- Contact a franchised Ic Bus dealer to schedule the free hex-flange-lock-nut replacement that keeps the steering and suspension joints tight.
- Bring the recall notice if Ic Bus mailed one. If not, reference recall number 22V870 when you call.
- Call Ic Bus customer service at 1-800-448-7825 with questions about scheduling or parts availability.
- Avoid unnecessary trips until the repair is complete because loose steering and suspension joints can affect steering stability.
What happens at the repair
At the dealer, an Ic Bus technician checks the hex flange lock nuts used in the suspension and steering joints and replaces the affected nuts as needed. The recall repair is free, with parts and labor covered. If you already paid for this repair before the owner letter, use the reimbursement instructions included in the customer notification and keep your repair documentation for the claim. Ask the service desk to confirm that the repair is filed under this recall before work begins.
| Reimbursement | Reimbursement available |
|---|
Timeline
| November 23, 2022 | NHTSA published the recall |
|---|---|
| January 20, 2023 | Dealer notification began |
| January 20, 2023 | Dealer notification ended |
| January 20, 2023 | Owner notification mailed |
| January 20, 2023 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| January 20, 2023 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 22V870?
Recall 22V870 covers 5,645 2023 Ic Bus EV, Cesb, and Resb vehicles with hex flange lock nuts in the steering and suspension joints that were improperly heat treated. If the nuts lose tension, steering instability can increase crash risk. Dealers will replace the nuts for free.
What should I do if my 2023 Ic Bus EV, Cesb, or Resb is on this recall?
Check your VIN to confirm your specific bus is included in recall 22V870. If it is, contact a franchised Ic Bus dealer to schedule replacement of the affected hex flange lock nuts. Reference recall number 22V870 and Navistar recall number 22525 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. For recall 22V870, dealers will replace the affected hex flange lock nuts as needed, free of charge, at a franchised Ic Bus dealer.
What is the safety risk in recall 22V870?
The safety risk is steering instability. In recall 22V870, the improperly heat-treated lock nuts can lose tension in steering and suspension joints, which increases crash risk. Confirm your VIN, then schedule the free dealer repair if your bus is included.
What if I bought this Ic Bus used?
The free recall repair still applies. Recall coverage follows the VIN, not the original owner. Check your VIN to confirm whether your 2023 Ic Bus EV, Cesb, or Resb is included, then call a franchised Ic Bus dealer and reference recall 22V870.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/22V870000 |
|---|---|
| Ic Bus customer service | 1-800-448-7825 |
| NHTSA recall # | 22V870 |
| NHTSA recall # (full) | 22V870000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
- Download Recall Report (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 →