Recall 17V399 covers 1,046 2012-2017 Trans Tech transit buses for an air-conditioning fuse short. Repair is free at any franchised Trans Tech dealer.
Trans Tech is recalling 1,046 2012-2017 ST Aero, Sst, Cst, Horizon, and Roadstar transit buses equipped with Bus-Air air conditioning systems because a 30AMP in-line fuse can short against the fuse-holder screw. A short circuit can overheat and melt the holder, increasing fire risk, and Trans Tech dealers will complete the repair free of charge.
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What's wrong?
The Bus-Air air conditioning system on 2012-2017 Trans Tech ST Aero, Cst, Sst, Horizon, and Roadstar buses uses an in-line fuse holder in the electrical feed for the A/C system. That fuse holder carries a 30AMP fuse, which is meant to protect the circuit by opening the circuit when electrical current exceeds the rated limit.
On affected buses, the fuse holder can overheat. The filing points to two conditions: the holder can short against the screw that secures it, and the circuit can be overloaded when extra equipment, including GPS or communication systems, is added. If the electrical area is not properly separated from the storage compartment, heat at the fuse holder can become a fire risk.
There is no warning sign before failure. Do not wait for a dash light or a change in A/C performance before asking a Trans Tech dealer to inspect the recalled fuse holder.
Who's affected?
Spans five Trans Tech bus lines from 2012-2017, all tied to the air conditioner component.
| 2013 Trans Tech ST Aero | Air conditioner |
|---|---|
| 2016 Trans Tech ST Aero | Air conditioner |
| 2017 Trans Tech Cst | Air conditioner |
| 2016 Trans Tech Cst | Air conditioner |
| 2015 Trans Tech Sst | Air conditioner |
| 2014 Trans Tech Sst | Air conditioner |
| 2015 Trans Tech Horizon | Air conditioner |
| 2014 Trans Tech Cst | Air conditioner |
| 2016 Trans Tech Roadstar | Air conditioner |
| 2014 Trans Tech Horizon | Air conditioner |
| 2016 Trans Tech Sst | Air conditioner |
| 2013 Trans Tech Sst | Air conditioner |
| 2012 Trans Tech ST Aero | Air conditioner |
| 2016 Trans Tech Horizon | Air conditioner |
| 2015 Trans Tech Cst | Air conditioner |
| 2012 Trans Tech Cst | Air conditioner |
| 2013 Trans Tech Cst | Air conditioner |
| 2012 Trans Tech Sst | Air conditioner |
| 2017 Trans Tech Sst | Air conditioner |
| 2014 Trans Tech ST Aero | Air conditioner |
| 2015 Trans Tech ST Aero | Air conditioner |
| 2017 Trans Tech ST Aero | Air conditioner |
| 2017 Trans Tech Horizon | Air conditioner |
| 2013 Trans Tech Horizon | Air conditioner |
| 2012 Trans Tech Horizon | Air conditioner |
| 2017 Trans Tech Roadstar | Air conditioner |
| 2015 Trans Tech Roadstar | Air conditioner |
| 2014 Trans Tech Roadstar | Air conditioner |
| 2013 Trans Tech Roadstar | Air conditioner |
| 2012 Trans Tech Roadstar | Air conditioner |
| Units affected | 1,046 |
| 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?
A short circuit in the fuse can make the fuse holder overheat and melt, increasing the risk of fire. Confirm your VIN and schedule the dealer repair soon. Repair is free at any franchised Trans Tech dealer.
What should I do?
- Check your VIN to confirm your 2012-2017 Trans Tech ST Aero, Cst, Sst, Horizon, or Roadstar is included in this recall.
- Contact a franchised Trans Tech dealer to schedule the free in-line mini fuse holder installation that keeps the Bus-Air air conditioning fuse from shorting against its securing screw.
- Bring the recall notice if Trans Tech mailed one, or reference recall number 17V399 when you call.
- Keep the bus out of service if the air conditioning fuse holder overheats or shows melting, and ask the dealer how to move it safely.
What happens at the repair
At the dealer, a Trans Tech technician installs an in-line mini fuse holder for the Bus-Air air conditioning system. The repair is free under the recall, with parts and labor covered. The fuse holder keeps the air conditioning fuse protected and secured, so the dealer work focuses on adding the correct in-line holder. Trans Tech has a general reimbursement plan on file for owners who already paid for this recall-related repair. Bring documentation of the paid repair to the service desk or contact Trans Tech customer service.
| Reimbursement | Reimbursement available |
|---|
Timeline
| June 26, 2017 | NHTSA published the recall |
|---|---|
| August 21, 2017 | Owner notification mailed |
| August 24, 2017 | Dealer notification began |
| August 24, 2017 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| August 24, 2017 | Interim owner notification (was planned for this date) |
| August 28, 2017 | Dealer notification ended |
Frequently asked questions
What is recall 17V399?
Recall 17V399 covers 1,046 2012-2017 Trans Tech ST Aero, Cst, Sst, Horizon, and Roadstar transit buses with Bus-Air air conditioning systems. The 30AMP in-line fuse can short against the fuse-holder screw, overheat, and melt, increasing fire risk. Dealers install an in-line mini fuse holder for free.
What should I do if my 2012-2017 Trans Tech ST Aero, Cst, Sst, Horizon, or Roadstar is on this recall?
Check your VIN to confirm your specific bus is included in recall 17V399. If it is, contact a franchised Trans Tech dealer to schedule the in-line mini fuse holder installation. Reference recall number 17V399 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the safety defect at no cost, and Trans Tech dealers will install the in-line mini fuse holder free of charge. Parts and labor are covered for buses included in recall 17V399.
What is the safety risk in recall 17V399?
The safety risk is fire. The Bus-Air air conditioning system uses a 30AMP in-line fuse that can short against the screw securing the fuse holder. If that happens, the holder can overheat and melt. The dealer repair corrects the fuse-holder setup for free.
When did owner notification start for recall 17V399?
Owner notification began on August 21, 2017. If you operate or bought a used Trans Tech bus and never received a notice, check your VIN to confirm whether recall 17V399 applies, then call a franchised Trans Tech dealer or Trans Tech customer service at 1-845-988-0419.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/17V399000 |
|---|---|
| Trans Tech customer service | 1-845-988-0419 |
| NHTSA recall # | 17V399 |
| NHTSA recall # (full) | 17V399000 |
Source documents
-
Download Misc. Document (PDF) - Download Recall Document (PDF) (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notice (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 →