Most false alarms on the Cobra 3865 are caused by the . Check for: Insects trapped inside the car. Strong air currents from open vents. Loose items hanging from the rearview mirror. The LED is Flashing a Pattern

If you need to leave a pet in the car or leave the windows slightly cracked, you must disable the interior sensors to avoid false alarms. Turn the ignition OFF.

Master the Cobra 3865: A Complete Guide to Your Vehicle Security System

If your remote battery dies or the remote is lost, you aren't stranded. Every Cobra 3865 comes with a 4-digit PIN code (found on your PIN card).

After you disarm the alarm, the LED may flash in a specific sequence. This is a telling you why the alarm went off: 1 Flash: Door/Bonnet/Boot opened. 2 Flashes: Ultrasonic sensor triggered. 3 Flashes: Ignition attempt. 4 Flashes: Tamper/Power cut. 6. Maintenance Tips

Open the driver's door with the mechanical key (the alarm will sound). Switch the ignition ON. The LED on the dash will start flashing. Count the flashes.

Turn the ignition back ON and repeat for the remaining three digits.

When the number of flashes matches the of your PIN, turn the ignition OFF.