2025 Emissions Testing Changes by State: Year-in-Review
See what changed for emissions testing in 2025. State-by-state updates on Texas inspections, New Hampshire phase-out, Bexar County rules, and what to check before renewal.
Read ArticleStay informed with the latest emissions testing news, state law changes, preparation tips, and expert advice. Updated for 2025.
See what changed for emissions testing in 2025. State-by-state updates on Texas inspections, New Hampshire phase-out, Bexar County rules, and what to check before renewal.
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See which U.S. states have no emissions testing requirements in 2025, which recently ended their programs, and which are phasing out smog checks soon.
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Learn how catalytic converter theft affects your emissions test, which replacement cats are legal, and how long to drive before retesting after a converter is replaced.
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Find out what happens when a deleted diesel hits a smog check. Learn about federal anti-tampering laws, how inspectors spot DPF and EGR deletes, and legal alternatives.
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Learn about 2025 diesel emissions regulations, state inspection programs, federal heavy-duty standards, and how to stay compliant. Fleet and owner-operator guide.
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Find out whether emissions testing is based on where you live, work, or register your car. Learn how states handle commuters and what to check before your renewal.
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Find out if hybrids need emissions testing and whether electric cars are exempt from smog checks. State-by-state breakdown of EV and hybrid requirements for 2025.
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Learn how emissions testing evolved from tailpipe sniffers to OBD-II scans. Understand readiness monitors, modern test technology, and what this means for drivers in 2025.
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Find out the best time to schedule your smog check. Learn how seasons, weather, and timing affect emissions test results and station wait times in 2025.
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Texas eliminated safety inspections in 2025, but emissions testing remains in 17 counties. Find out if you still need a smog check for registration renewal.
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Avoid these common smog check mistakes in 2025. Learn why testing with a check engine light, clearing codes, skipping warm-up, and other errors cause emissions test failures.
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