2014–2017 Thomas Built Buses Saf-T-Liner HDX Recall: These vehicles use a rubber elbow to connect a coolant line to a heater…
NHTSA campaign 16V324000 · Engine and Engine Cooling · filed May 19, 2016 · verified Sep 13, 2026
The defect
Daimler Trucks North America LLC (DTNA) is recalling certain model year 2014-2017 Thomas Built Buses Saf-T-Liner HDX buses manufactured November 29, 2012, to February 4, 2016. These vehicles use a rubber elbow to connect a coolant line to a heater inside the bus. This elbow may restrict coolant flow and possibly fail as a result of the increased stress on the elbow.
The risk
If the rubber elbow fails, hot coolant may leak inside the bus body increasing risk of injury to the passengers.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
DTNA will notify owners, and dealers will replace the rubber elbow with a nylon fitting, free of charge. An interim notice was mailed on July 6, 2016. The recall began on September 20, 2016. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-708.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Thomas Built Buses | Saf-T-Liner HDX | 2014, 2015, 2016, 2017 |
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All Thomas Built Buses Saf-T-Liner HDX recalls → · All Thomas Built Buses recalls →
Source: NHTSA recall database, campaign 16V324000 (manufacturer number FL-708). Data last verified Sep 13, 2026.