Recall 24V336 covers 398 2024-2025 Saf-T-Liner C2 and C2 Jouley buses for park-brake failure. Repair is free at any franchised Thomas Built Buses dealer.
Thomas Built Buses is recalling 398 2024-2025 Saf-T-Liner C2 Jouley and Saf-T-Liner C2 school buses because the rubber ball seal in the Intellipark park valve module can fracture and leak. That leak can cause park brake failure or unexpected park brake engagement while driving and increase crash risk; Thomas Built Buses dealers will complete the repair free of charge.
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What's wrong?
The Intellipark Park Valve Module on 2024-2025 Thomas Built Buses Saf-T-Liner C2 Jouley and Saf-T-Liner C2 school buses helps control the air-operated parking brake. Inside that module, a rubber ball seal helps hold and release air pressure so the parking brake applies when parked and releases when the bus is ready to move. The valve has to seal correctly for the park brake to behave as commanded.
In the affected modules, the rubber ball seal was improperly molded and can contain a crack. That crack can tear during assembly, then grow after repeated brake use and exposure to heat, cold, moisture, and road conditions. Once the seal leaks too much air, the parking brake can fail to hold or can engage unexpectedly while the bus is moving.
Drivers have status lights on the parking brake control switch and dashboard warnings for the parking brake. During a pre-trip inspection, the driver can notice missing air-exhaust sounds when parking or hear an excessive air leak before the bus is put in service.
Who's affected?
Covers both Saf-T-Liner C2 models for 2024 and 2025, with the same parking-brake component listed for each.
| 2025 Thomas Built Buses Saf-T-Liner C2 Jouley | Parking brake |
|---|---|
| 2025 Thomas Built Buses Saf-T-Liner C2 | Parking brake |
| 2024 Thomas Built Buses Saf-T-Liner C2 Jouley | Parking brake |
| 2024 Thomas Built Buses Saf-T-Liner C2 | Parking brake |
| Units affected | 398 |
| 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?
Park brake failure or unexpected park brake engagement while driving increases the risk of a crash. Watch the parking brake switch LEDs, dashboard telltales, dash messages, normal air-brake parking sounds, and air leaks during pre-trip inspection. If anything does not match normal operation, keep the bus out of service and call the dealer. Repair is free at any franchised Thomas Built Buses dealer.
What should I do?
- Check your VIN to confirm your 2024-2025 Thomas Built Buses Saf-T-Liner C2 Jouley or Saf-T-Liner C2 school bus is included in this recall.
- Contact a franchised Thomas Built Buses dealer to schedule the free Intellipark PVM replacement that fixes the park brake leak and unexpected engagement risk.
- Reference recall number 24V336 when you call the dealer.
- Bring the owner notice if you have it, and keep any service paperwork after the repair.
- Ask Thomas Built Buses customer service at 1-800-547-0712 about recall F1000 if the dealer needs help matching the campaign.
What happens at the repair
At the dealer, a Thomas Built Buses technician replaces the Intellipark PVM as a complete unit. The module is removed and replaced with a PVM that does not contain the defect; it is not opened or serviced in the field. Parts and labor are covered under the recall, and the repair is available now. Owner letters were mailed August 2, 2024, so a dealer can confirm the repair path for an included VIN.
Timeline
| May 14, 2024 | NHTSA published the recall |
|---|---|
| June 2, 2024 | Dealer notification began |
| June 2, 2024 | Dealer notification ended |
| August 2, 2024 | Owner notification mailed |
| September 10, 2024 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| September 10, 2024 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 24V336?
Recall 24V336 covers 398 2024-2025 Thomas Built Buses Saf-T-Liner C2 Jouley and Saf-T-Liner C2 school buses with an Intellipark park valve module defect. The rubber ball seal can fracture and leak, leading to park brake failure or unexpected park brake engagement while driving.
What should I do if my 2024-2025 Thomas Built Buses Saf-T-Liner C2 Jouley or Saf-T-Liner C2 is on this recall?
Check your VIN to confirm your specific bus is included in recall 24V336. If it is, contact a franchised Thomas Built Buses dealer to schedule the Intellipark PVM replacement. Reference recall number 24V336 or DTNA recall F1000 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and DTNA's remedy says dealers will replace the Intellipark PVM free of charge. Parts and labor are covered at a franchised Thomas Built Buses dealer.
What is the safety risk?
The safety risk is loss of reliable park brake operation. A fractured rubber ball seal in the Intellipark PVM can cause a leak, which can lead to park brake failure or unexpected park brake engagement while driving. That condition increases crash risk under recall 24V336.
When were owners notified about recall 24V336?
DTNA mailed owner notification letters on August 2, 2024. If you manage one of these school buses and did not receive a letter, check your VIN and contact a franchised Thomas Built Buses dealer or DTNA customer service at 1-800-547-0712.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/24V336000 |
|---|---|
| Thomas Built Buses customer service | 1-800-547-0712 |
| NHTSA recall # | 24V336 |
| NHTSA recall # (full) | 24V336000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notice (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Document (PDF) (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 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →