F/CMVSS 121: Air Brake Systems

February 10, 2023

Brakes are arguably the most important safety system in a vehicle. Federal/Canada Motor Vehicle Safety Standard 121 establishes performance requirements for all air-braked vehicles, such as trucks, buses, tractors, trailers, etc. (some exceptions apply).

Make NTEA your Association today and unlock access to exclusive resources, tools and insights.

Join online

Federal Excise Tax (FET) on parts and accessories

Some NTEA members have asked about Federal Excise Tax (FET) as related to parts and accessories rulings. As with most FET questions, solutions are vehicle-specific. The Internal Revenue Service breaks FET into specific...

September 1, 2025

Federal Excise Tax (FET) Implications

Tech Trends

FMVSS 125 Warning Devices

Federal Motor Vehicle Safety Standard (FMVSS) 125 establishes shape, size and performance requirements for nonpowered day and night warning devices that can be erected on or near the roadway to warn approaching traffic...

September 1, 2025

Federal Motor Vehicle Safety Standard (FMVSS) Guidance

Tech Trends

FMVSS 125 Warning Devices

September 1, 2025

Federal Motor Vehicle Safety Standard (FMVSS) Guidance

F/CMVSS 121: Air Brake Systems

Recommended Articles

Federal Excise Tax (FET) on parts and accessories

FMVSS 125 Warning Devices

FMVSS 125 Warning Devices