Murrieta, CA Noise from Specific Sources: Car Alarm Limits (2026)

3 prohibits sounding or permitting the sounding of an exterior burglar or fire alarm, or a motor vehicle burglar alarm, unless the alarm is terminated within fifteen (15) minutes of activation. 070, which treats any alarm, including a vehicle alarm, as a public nuisance once it has sounded continuously for at least one hour or intermittently for two hours and a nearby resident has reported it to the police department while the owner is unavailable to silence it. Once an alarm meets that threshold, any police officer or police aide may enter exterior private property, and vehicles on private property or public streets, to silence it, including forcible entry into exterior alarm equipment boxes, and may take action to silence a vehicle alarm including having the vehicle towed under the California Vehicle Code.

The city and its officers are immune from liability for damage caused by a reasonable effort to silence the alarm. 070 also creates a separate false-alarm track: four false alarms at the same location within any ninety-day period is deemed excessive, and the chief of police can place the location on "no response" status, meaning police will not respond to further activations unless a witness at the scene personally reports an actual crime, until the owner shows the underlying problem has been fixed.