What year were catalytic converters required in vehicles?

The requirement for catalytic converters in vehicles was established in 1975 as part of the U.S. emissions regulations aimed at reducing harmful exhaust emissions. This was a significant step to address air quality concerns, as catalytic converters help to convert toxic gases from the engine into less harmful substances.

By 1975, cars manufactured for the U.S. market were mandated to be equipped with catalytic converters, particularly to meet the stricter emissions standards set by the Environmental Protection Agency (EPA). This requirement played a crucial role in the automotive industry, leading to advancements in technology that not only improved emissions control but also contributed to the development of better fuel efficiency over the years.

Understanding this timeline is important, as it contextualizes how vehicle emissions standards have evolved and the role of catalytic converters in helping to mitigate pollution from automobiles.