Concord, CA Noise Ordinances: Vehicle Noise (2026)
Key Facts
- Exhaust/Muffler
- CVC §27150, §27151
- Audio Audible Distance
- 50 ft rule (CVC §27007)
- Diesel Idle Limit
- 5 minutes (CARB statewide)
- Sideshow/Racing
- CVC §23109 + local impound ordinance
- Enforcement
- Concord Police, CHP
Summary
Vehicle noise in Concord is governed primarily by California Vehicle Code sections that limit exhaust noise, prohibit modified mufflers, and cap amplified sound audible at 50 feet. Concord Police enforce these alongside local ordinance provisions prohibiting revving, racing, and extended idling in residential areas.
(a) Every motor vehicle equipped with an internal combustion engine and subject to registration shall at all times be equipped with an adequate muffler in constant operation and properly maintained to prevent any excessive or unusual noise, and no muffler or exhaust system shall be equipped with a cutout, bypass, or similar device.
(b) Except as provided in Division 16.5 (commencing with Section 38000) with respect to off-highway motor vehicles subject to identification, every passenger vehicle operated off the highways shall at all times be equipped with an adequate muffler in constant operation and properly maintained so as to meet the requirements of Article 2.5 (commencing with Section 27200), and no muffler or exhaust system shall be equipped with a cutout, bypass, or similar device.
(c) The provisions of subdivision (b) shall not be applicable to passenger vehicles being operated off the highways in an organized racing or competitive event conducted under the auspices of a recognized sanctioning body or by permit issued by the local governmental authority having jurisdiction, or to vehicles not equipped with an internal combustion engine.
Full Breakdown
Vehicle noise enforcement in Concord combines state Vehicle Code authority with Municipal Code Chapter 82 noise provisions. California Vehicle Code §27150 requires every motor vehicle to have an adequate muffler preventing excessive or unusual noise, and §27151 prohibits muffler modifications that amplify sound beyond original equipment specifications. California Vehicle Code §23130 establishes maximum vehicle pass-by noise standards (generally 80 dBA for passenger vehicles at 50 feet). CVC §27007 prohibits vehicle audio audible 50 feet or more from the vehicle. Locally, Concord prohibits prolonged idling of commercial vehicles in residential zones, street racing, and engine revving that disturbs residents. CHP-certified officers and Concord Police can issue fix-it citations for muffler violations requiring BAR Referee station inspection. Street racing and sideshow activity are enforced aggressively under CVC §23109 and can result in vehicle impound under the city's sideshow prevention ordinance. Diesel truck idling is additionally restricted by CARB's statewide 5-minute idle rule.
Frequently Asked Questions
Is engine revving illegal in Concord?
Can I get a ticket for a loud exhaust?
How long can a truck idle in front of my house?
Sources & Official References
Other rules in Concord
California rules heatmap·Compare Concord to another location·View the California noise ordinances overview
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Vehicle Noise in Nearby Cities
How other cities in Contra Costa County handle vehicle noise.