Mazda 6 alarm system light engaged with blinker and horn malfunction, issue unresolved on Mazda 6

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mazda 6 owners report experiencing issues with the alarm system light, blinker, and horn malfunctions. They note that a constantly flashing or illuminated warning light may indicate a system malfunction. Additionally, when the key is removed from the ignition and the alarm system light flashes every two seconds, it could signal a problem with the backup battery that powers the alarm system and siren. Some owners have also encountered problems related to door actuators, particularly in the 2nd generation Mazda 6, which may require dealer assistance to identify the faulty actuator. Furthermore, issues with rear door sensors, especially on the driver or passenger side, have been reported, with dealers having the necessary tools to pinpoint the specific sensor causing the problem. For temporary relief, some owners have attempted to unplug the horns under the front passenger side. To effectively resolve these issues, it is recommended that Mazda 6 owners consult with an expert repairer, ideally an Authorized Mazda Repairer, for proper diagnosis and repair.

1 person reported this problem
0 comments
Schedule Repair

Mazda 6 vehicles with this problem

0 model year affected

Search for another problem

RepairPal Car Genius

Ask our experts about your Mazda.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Available 9am – 6pm ET Monday through Friday

Call Our Experts
© 2026 RepairPal, Inc. RepairPal® RepairPal Certified®