Recall 19V565 affects 1,010 2017-2020 Prevost H3-45 and X3-45 buses for engine overheating and shutdown. Software update is free at any franchised Prevost dealer.
Prevost is recalling 1,010 2017-2020 H3-45 and X3-45 buses because the engine can overheat and shut down during conditions such as high altitude and heavy climbing. An unexpected shutdown can leave passengers transferring on the roadside and increase crash risk while moving; Prevost dealers will complete the recall repair free of charge.
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What's wrong?
The 2017-2020 Prevost H3-45 and X3-45 buses use engine software to manage cooling, including the Electrical Fan Drive system that controls fan operation. Under load, that software is supposed to keep coolant temperature within range so the engine can keep running during long climbs and high-altitude operation.
On affected buses, the software's cooling strategy lets the engine run hotter than intended under certain high-altitude conditions. Heavy climbing adds heat, and the fan-drive strategy does not bring the temperature down soon enough. If the engine overheats, it can shut down instead of continuing to power the bus.
Before shutdown, the driver gets dashboard warnings. These can include a warning light or malfunction indicator light tied to engine coolant over-temperature or low coolant-level fault codes.
Who's affected?
Spans the H3-45 and X3-45 buses across four model years, all tied to the engine component.
| 2017 Prevost H3-45 | Engine |
|---|---|
| 2017 Prevost X3-45 | Engine |
| 2018 Prevost H3-45 | Engine |
| 2018 Prevost X3-45 | Engine |
| 2019 Prevost H3-45 | Engine |
| 2019 Prevost X3-45 | Engine |
| 2020 Prevost H3-45 | Engine |
| 2020 Prevost X3-45 | Engine |
| Units affected | 1,010 |
| Field incidents | NHTSA has logged no field incidents to date. |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific bus is included.
What's the safety risk?
An unexpected engine shutdown can leave passengers waiting for transfer on the roadside, which increases injury risk. If the engine shuts down while the coach is moving, crash risk increases. Dashboard warning lights or a MIL light can flag coolant overheating or low coolant before shutdown. Repair is free at any franchised Prevost dealer.
What should I do?
- Check your VIN to confirm your 2017-2020 Prevost H3-45 or X3-45 is included in this recall.
- Contact a franchised Prevost dealer to schedule the free engine software update that addresses overheating and engine shutdown under high-altitude or heavy-climb conditions.
- Bring the recall notice if Prevost mailed one. If not, reference recall number 19V565 when you call.
- Avoid long climbs or high-altitude heavy-load operation until the engine software update is complete.
What happens at the repair
At the dealer, a Prevost technician updates the engine software so the engine management system handles the overheating condition addressed by recall 19V565. The engine software update and labor are free under the recall. If you already paid to have this defect inspected and corrected before the safety recall launched, Prevost's reimbursement plan covers eligible documented costs. Bring proof of the prior inspection, correction, and payment to the service desk, or contact Prevost customer service for the reimbursement process.
| Reimbursement | Reimbursement available |
|---|
Timeline
| July 31, 2019 | NHTSA published the recall |
|---|---|
| December 19, 2019 | Owner notification mailed |
| September 20, 2023 | Dealer notification began |
| September 20, 2023 | Dealer notification ended |
| September 20, 2023 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| September 20, 2023 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 19V565?
Recall 19V565 covers 1,010 2017-2020 Prevost H3-45 and X3-45 buses with engine software that can allow overheating and engine shutdown under high-altitude or heavy-climbing conditions. Prevost updates the engine software for free.
What should I do if my 2017-2020 Prevost H3-45 or X3-45 is on this recall?
Check your VIN to confirm your specific bus is included in recall 19V565. If it is, contact a franchised Prevost service center to schedule the free engine software update. Reference recall number 19V565 when you call.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Prevost provides the engine software update free of charge. Prevost customer service is at 1-866-870-2046 for scheduling support.
What is the safety risk?
The engine can overheat and shut down unexpectedly. If that happens on the road, passengers can need transfer to another vehicle at the roadside, which raises injury risk. If the shutdown happens while the bus is moving, crash risk increases.
When did the Prevost recall repair begin?
Prevost began the recall on December 19, 2019. The remedy is available, so owners of affected 2017-2020 H3-45 and X3-45 buses can schedule the free engine software update with Prevost service.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/19V565000 |
|---|---|
| Prevost customer service | 1-866-870-2046 |
| NHTSA recall # | 19V565 |
| NHTSA recall # (full) | 19V565000 |
Source documents
-
Download Quarterly Report (PDF) - Download Recall Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 24, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →