Recall 17V257 affects 336 2016-2018 Ic Bus Cesb school buses for an unfused heater booster pump circuit. Repair is free at franchised Ic Bus dealers.
Ic Bus is recalling 336 2016-2018 Cesb school buses because the power circuit for the heater booster pump can be unfused on buses with a plastic booster pump, 17k Webasto heater, and Webasto Smart Temp timer. Without circuit protection, an electrical failure can increase the risk of a fire; Ic Bus dealers will complete the free repair.
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What's wrong?
The heater booster pump circuit on 2016-2018 Ic Bus Cesb school buses supplies power to the pump that moves hot coolant through the Webasto heater system. That pump helps the auxiliary heater circulate heat through the bus instead of relying only on engine-driven flow. A fuse is supposed to sit in that power path so excess current stops at the fuse before it heats the wiring.
In recall 17V257, the booster pump harness was built from an engineering drawing that put the circuit on the wrong side of the fuse in the terminal block. That left the heater booster pump power circuit without fuse protection. If the circuit is overloaded or shorted, the wiring from the fuse block to the pump can heat up and melt before a fuse stops the current.
There is no warning sign before failure. The issue is in the circuit routing inside the harness, so an owner or driver is not given a normal dashboard alert before the wiring overheats.
Who's affected?
The scope stays within one Cesb model line across the 2016, 2017, and 2018 model years, all tied to the electrical system.
| 2016 Ic Bus Cesb | electrical system |
|---|---|
| 2017 Ic Bus Cesb | electrical system |
| 2018 Ic Bus Cesb | electrical system |
| Units affected | 336 |
| Field incidents | NHTSA has logged 1 field incident 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?
NHTSA campaign 17V257 links the risk to missing circuit protection. If the heater booster pump has an electrical failure, the unfused circuit can increase the risk of fire. The filing lists no warning sign before this failure, so have the repair scheduled soon. Repair is free at any franchised Ic Bus dealer.
What should I do?
- Check your VIN to confirm your 2016-2018 Ic Bus Cesb is included in this recall.
- Contact a franchised Ic Bus dealer to schedule the free heater-booster-pump circuit repair that moves the circuit to a fused section of the power distribution center.
- Bring the recall notice if you have it, and reference recall number 17V257 when you call.
- Follow Ic Bus dealer instructions for using the Webasto heater until the circuit repair is complete.
- Call Ic Bus customer service at 1-331-332-1590 with questions about scheduling or dealer instructions.
What happens at the repair
At the dealer, an Ic Bus technician moves the Webasto heater booster pump power circuit to a fused section of the power distribution center. That adds fuse protection to the circuit identified in recall 17V257. The repair is available now, and parts and labor are covered by the recall. The manufacturer's standard reimbursement plan applies to qualifying repairs completed before the owner notice. Follow the reimbursement instructions included in the customer notification if you already paid for this repair.
| Reimbursement | Reimbursement available |
|---|
Timeline
| April 18, 2017 | NHTSA published the recall |
|---|---|
| May 12, 2017 | Owner notification mailed |
| June 16, 2017 | Dealer notification began |
| June 16, 2017 | Dealer notification ended |
| June 16, 2017 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| June 16, 2017 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 17V257?
Recall 17V257 covers 336 2016-2018 Ic Bus Cesb school buses with an unfused heater booster pump power circuit. If the heater booster pump has an electrical failure without circuit protection, fire risk increases. Ic Bus dealers relocate the circuit to a fused section for free.
What should I do if my 2016-2018 Ic Bus Cesb is on this recall?
Check your VIN to confirm your specific school bus is included in recall 17V257. If it is, contact a franchised Ic Bus dealer to schedule the heater booster pump circuit repair. Reference recall number 17V257 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and Ic Bus dealers relocate the heater booster pump power circuit to a fused section of the power distribution center free of charge.
What is the safety risk?
The safety risk is fire. The heater booster pump power circuit lacks fuse protection on affected buses, so an electrical failure in that pump circuit increases the risk of a fire. The dealer repair adds the needed circuit protection.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/17V257000 |
|---|---|
| Ic Bus customer service | 1-331-332-1590 |
| NHTSA recall # | 17V257 |
| NHTSA recall # (full) | 17V257000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 25, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →