← Arizona driving laws›Exhaust & Muffler
Arizona Exhaust & Muffler Laws (2026)
Info: Your vehicle needs a working muffler. A muffler cutout or bypass (which routes exhaust around the muffler) is prohibited, and excessive fumes or smoke are barred.
InfoVerified Jul 23, 2026
Your vehicle needs a working muffler. A muffler cutout or bypass (which routes exhaust around the muffler) is prohibited, and excessive fumes or smoke are barred. A violation carries a civil penalty. Arizona sets no fixed decibel limit (A.R.S. § 28-955).
General legal information, not legal advice — verify important decisions with a licensed attorney.
Don't get caught off guardGet a push the moment Arizona law changes — or when you cross into a state where it's different. Free.Get the free appLawLert is an independent app, not affiliated with any government — informational only, not legal advice. Verify with a licensed attorney in your jurisdiction.