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Thomas Built Buses Saf-T-Liner EFX Recall 21V850: Loose Alternator Cable Can Cause Electrical Arcing and Fire

NHTSA campaign 21V850, reported November 2, 2021, 1,434 vehicles potentially affected.

What this recall means for you

Some 2020-2022 Thomas Built school buses (EFX and HDX Saf-T-Liner models) may have a power cable nut on the alternator that was not tightened properly. A loose power cable connection can cause electrical arcing, which increases the risk of a fire.

If you own an affected bus, dealers will inspect the alternator power cable connection and tighten it if necessary. This repair is free of charge. Owner notification letters were mailed on December 17, 2021. You can contact Daimler Trucks North America customer service at 1-800-547-0712, referencing recall number FL904. You can also check your vehicle identification number (VIN) for open recalls.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 21V850Daimler Trucks North America, LLC
Component
ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
Problem
Daimler Trucks North America, LLC (DTNA) is recalling certain 2020-2022 Thomas Built EFX and HDX school buses. The nut for the power cable stud on the alternator may not have been tightened properly, which can cause a loose cable connection.
Risk
A loose power cable connection may cause electrical arcing, which can increase the risk of a fire.
Remedy
Dealers will inspect the alternator power cable connection and tighten it if necessary, free of charge. Owner notification letters were mailed on December 17, 2021. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL904.
Notes
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.nhtsa.gov.

Affected vehicles

Thomas Built Buses Saf-T-Liner EFX202020212022
Thomas Built Buses Saf-T-Liner HDX202020212022