California's Modified Smog Check Legislation: The Journey of "Leno's Law"

California Senate Bill 712, known as "Leno's Law," aimed to exempt motor vehicles 35 model years or older from biennial smog tests. Initially, the bill sought to include all vehicles from 1986 and earlier but was ultimately halted on August 29, 2025, after passing through the California Senate and Assembly Transportation Committee. The bill was stalled by the Assembly Appropriations Committee, leading to its demise.

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In a renewed effort, Senators Shannon Grove and Dave Cortese have introduced a modified version, California Senate Bill 1392, on February 20, 2026. This new bill aims to provide a clearer path for classic car enthusiasts to secure smog exemptions, with an initial hearing scheduled for April 14, 2026.

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Senate Bill 1392 retains much of the language from its predecessor, SB 712, but introduces significant modifications. If passed, the bill will extend smog exemptions to vehicles from model years 1986 and older, effective from January 1, 2027, until 2032. A notable change is the requirement that exempted vehicles must not serve as the owner's primary mode of transportation. Instead, the bill specifies that these vehicles should be used for shows, parades, charitable events, and historical exhibitions, focusing on their maintenance and preservation.

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Prominent figures, including Jay Leno, have voiced their support for the revised legislation. Leno's advocacy highlights the cultural and historical significance of classic cars, emphasizing the need for legislation that recognizes their unique status. The support from influential figures may bolster the bill's chances of passing through the legislative process.

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Despite the renewed push for SB 1392, there are concerns among environmental advocates regarding the implications of exempting older vehicles from smog checks. Critics argue that such exemptions could undermine California's efforts to reduce air pollution and combat climate change. The debate continues as stakeholders weigh the cultural value of classic cars against environmental considerations.

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Senator Shannon Grove has expressed optimism about the bill's prospects, stating that the modifications address previous concerns while still supporting classic car enthusiasts. Meanwhile, environmental groups have reiterated their commitment to air quality, urging lawmakers to consider the broader implications of smog exemptions.

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The legislative journey of SB 1392 will unfold with its upcoming hearing on April 14, 2026. As discussions progress, stakeholders from various sectors will continue to engage in dialogue about the balance between preserving automotive history and maintaining environmental standards.

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