No, muffler deletes are illegal in Wisconsin. State law mandates all vehicles to maintain an operational muffler that meets federal noise standards, with enforcement by the Wisconsin Department of Transportation (WisDOT). Local municipalities may impose additional penalties, and 2026 compliance shifts could tighten enforcement.
Key Regulations for Muffler Deletes in Wisconsin
- Wisconsin Statute § 347.45 requires vehicles to have a muffler in good working order, prohibiting modifications that amplify noise beyond 92 decibels.
- WisDOT Administrative Code NR 125.04 enforces federal EPA noise standards, barring muffler deletes even if the vehicle passes inspection.
- Local Ordinances in cities like Milwaukee and Madison impose fines up to $200 for muffler violations, with potential vehicle impoundment for repeat offenses.
Enforcement prioritizes commercial vehicles and modified imports, but passenger cars face scrutiny during routine traffic stops. Dealers and repair shops must document compliance or risk liability under Wisconsin’s anti-tampering statutes.