Business · 17/02/1998Updated: 10/17/2026 · 1 min read

NHTSA Amends Federal Motor Vehicle Safety Standard for Trailer Braking Systems

Summary

The National Highway Traffic Safety Administration (NHTSA) has updated Federal Motor Vehicle Safety Standard (FMVSS) No. 121 to allow for the placement of the external antilock braking system (ABS) malfunction indicator lamp on trailers with limited structural attachment points, enhancing safety and design flexibility.

Original source language: Federal Register — National Highway Traffic Safety AdministrationOpen original release →

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