Recall 25V279 affects 594 2021-2026 Temsa TS30, TS35, and TS45 buses for unintended brake activation. Repair is free at any franchised Temsa dealer.
Temsa is recalling 594 2021-2026 TS30, TS35, and TS45 buses equipped with a Mux5-B multiplex because the temporary bus stop valve can activate unintentionally and apply the brakes. Overheated brakes increase fire risk, and Temsa dealers will complete the repair free of charge.
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What's wrong?
On 2021-2026 Temsa TS30, TS35, and TS45 buses, the Mux5-B multiplex is part of the electrical control system that sends commands between vehicle controls and equipment. One command path is tied to the temporary bus stop valve, which applies brake pressure only when the system calls for it.
In affected buses, the issue is in the electrical harness and software setup, not a replacement part defect. Electrical connector pins tied to this circuit can be damaged by high inductive load, which is a heavy electrical load that creates stress on the circuit. Once those pins are damaged, the temporary bus stop valve can activate without a driver command and apply the brakes.
There is no warning sign before failure. If the condition happens, the brakes can be applied unintentionally and overheat, which is why the recall repair changes the harness and software rather than replacing the Mux5-B unit.
Who's affected?
Covers three Temsa bus lines across the 2021-2026 model years, all tied to the Mux5-B wiring installation.
| 2021 Temsa TS30 | wiring |
|---|---|
| 2022 Temsa TS30 | wiring |
| 2021 Temsa TS35 | wiring |
| 2022 Temsa TS35 | wiring |
| 2021 Temsa TS45 | wiring |
| 2022 Temsa TS45 | wiring |
| 2025 Temsa TS30 | wiring |
| 2023 Temsa TS30 | wiring |
| 2023 Temsa TS35 | wiring |
| 2024 Temsa TS30 | wiring |
| 2024 Temsa TS35 | wiring |
| 2025 Temsa TS35 | wiring |
| 2023 Temsa TS45 | wiring |
| 2024 Temsa TS45 | wiring |
| 2025 Temsa TS45 | wiring |
| 2026 Temsa TS45 | wiring |
| Units affected | 594 |
| 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?
Brakes that overheat can increase the risk of a fire. If your VIN is included, schedule the recall repair soon and follow dealer instructions before putting the coach back into service. Repair is free at any franchised Temsa dealer.
What should I do?
- Check your VIN to confirm your 2021-2026 Temsa TS30, TS35, or TS45 bus is included in this recall.
- Contact a franchised Temsa dealer to schedule the free multiplex inspection, software update, and wiring-harness repair that stops the temporary bus stop valve from applying the brakes and overheating them.
- Bring the owner letter if it is available, and reference recall number 25V279 when you call.
- Call Temsa customer service at 1-833-628-3672 with questions about scheduling or repair availability.
- Ask the dealer whether the bus should stay out of service until repair if the temporary bus stop valve has activated unexpectedly.
What happens at the repair
At the dealer, a Temsa technician inspects the multiplex system, updates the software, and repairs the wiring harness where the recall inspection finds a wiring issue. The recall repair is free, including parts and labor. Because Temsa has a general reimbursement plan on file, owners who paid out of pocket for a related multiplex, software, or wiring harness repair before the recall notice can ask Temsa customer service how to submit documentation for reimbursement.
| Reimbursement | Reimbursement available |
|---|
Timeline
| April 29, 2025 | NHTSA published the recall |
|---|---|
| May 12, 2025 | Interim owner notification (was planned for this date) |
| June 11, 2025 | Owner notification mailed |
Frequently asked questions
What is recall 25V279?
Recall 25V279 covers 594 2021-2026 Temsa TS30, TS35, and TS45 buses equipped with a Mux5-B multiplex. The temporary bus stop valve can activate unintentionally and apply the brakes, causing overheating and increasing fire risk. Temsa will inspect the multiplex, update the software, and repair the wiring harness for free.
What should I do if my 2021-2026 Temsa TS30, TS35, or TS45 is on this recall?
Check your VIN to confirm your specific bus is included in recall 25V279. If it is, contact a franchised Temsa dealer or Temsa customer service at 1-833-628-3672 to schedule the multiplex inspection, software update, and any needed wiring harness repair. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to fix the defect at no cost, and Temsa will inspect the multiplex, update the software, and repair the wiring harness as necessary free of charge.
What is the safety risk?
The safety risk is brake overheating and fire. In affected buses, the temporary bus stop valve can activate unintentionally and apply the brakes. If the brakes overheat, fire risk increases. Confirm your VIN, then arrange the free Temsa repair if your bus is included.
When were owners notified about recall 25V279?
Temsa mailed owner notification letters on June 11, 2025. If you operate a used bus, manage a fleet, or never received the letter, the VIN still decides whether this recall applies. Reference recall 25V279 when you call Temsa customer service or the dealer.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/25V279000 |
|---|---|
| Temsa customer service | 1-833-628-3672 |
| NHTSA recall # | 25V279 |
| NHTSA recall # (full) | 25V279000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notification Letter (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 19, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →