Wyoming, MI Noise Ordinances: Vehicle Noise (2026)

Michigan handles vehicle noise primarily through the state Michigan Vehicle Code rather than local ordinance, and Wyoming follows the state framework. MCL 257.707(1) provides: 'A motor vehicle, including a motorcycle or moped, must be equipped with a muffler in good working order and in constant operation to prevent excessive or unusual noise and annoying smoke.' MCL 257.707c sets the specific dBA caps measured at a distance of 50 feet: heavy vehicles (8,500 lbs or more) - 90 dBA above 35 mph speed limit, 86 dBA at 35 mph or less; passenger vehicles - 82 dBA above 35 mph, 76 dBA at 35 mph or less; motorcycles and mopeds - 86 dBA above 35 mph, 82 dBA at 35 mph or less. The statute also prohibits muffler cutouts, bypasses, or similar devices: 'A person shall not remove, destroy, or damage any baffles contained in the muffler, nor shall a person use a muffler cutout, bypass, or similar device upon a motorcycle or moped on a highway or street.' Penalty under MCL 257.907 is a civil infraction with a civil fine of not more than $100 plus mandatory state and court costs. Local Wyoming Chapter 30 / Chapter 50 noise-disturbance citations are independently available for stationary noise (parked vehicle with revving engine, after-hours loud exhaust in a residential driveway). The Wyoming Department of Public Safety - Police (616-530-7300) and Michigan State Police Rockford Post both write citations on I-196, US-131, and the surface-street network through Wyoming.