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Illinois Compiled Statutes

625 ILCS 5/12-602 (2026)

Mufflers, prevention of noise

✓ current as of May 2026
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(625 ILCS 5/12-602) (from Ch. 95 1/2, par. 12-602)
    Sec. 12-602. Mufflers, prevention of noise.
    Every motor vehicle driven or operated upon the highways of this State shall at all times be equipped with an adequate muffler or exhaust system in constant operation and properly maintained to prevent any excessive or unusual noise. No such muffler or exhaust system shall be equipped with a cutout, bypass or similar device. No person shall modify the exhaust system of a motor vehicle in a manner which will amplify or increase the noise of such vehicle above that emitted by the muffler originally installed on the vehicle, and such original muffler shall comply with all the requirements of this Section.
(Source: P.A. 77-37.)

    
Notes of Decisions
Cited in 5 cases (2 in the last 5 years), 2000–2024 · leading case: People v. Fields, 2024 IL App (4th) 210194-B (Ill. App. Ct. 2024).
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People v. Fields, 2024 IL App (4th) 210194-B (Ill. App. Ct. 2024). · cites it 4× “¶ 38 Section 12-602 of the Illinois Vehicle Code (625 ILCS 5/12-602 (West 2018)) states: “Every motor vehicle driven or operated upon the highways of this State shall at all times be equipped with an adequate muffler or exhaust system in constant operation and properly…”
Vill. of Mundelein v. Franco, 740 N.E.2d 801 (Ill. App. Ct. 2000). “One of the areas addressed involves section 12-602 of the Vehicle Code, which requires mufflers on motor vehicles (625 ILCS 5/12-602 (West 1998)). Subsection (e) ends by stating: "No unit of local government, including a home rule unit, may regulate motorcycles in a manner…”
People v. Miller, 803 N.E.2d 610 (Ill. App. Ct. 2004). “He pulled defendant over because his car had an "abnormally loud" muffler, a violation of section 12-602 of the Illinois Vehicle Code (625 ILCS 5/12-602 (West 2002)). See also People v.”
People v. Fields, 2022 IL App (4th) 210194 (Ill. App. Ct. 2022). · cites it 4× “¶ 41 Section 12-602 of the Illinois Vehicle Code (625 ILCS 5/12-602 (West 2018)) states: “Every motor vehicle driven or operated upon the highways of this State shall at all times be equipped with an adequate muffler or exhaust system in constant operation and properly…”
People v. Miller (Ill. App. Ct. 2004). “He pulled defendant over because his car had an "abnormally loud" muffler, a violation of section 12-602 of the Illinois Vehicle Code (625 ILCS 5/12-602 (West 2002)) . See also People v.”
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