C8 Siren Communication Fault

Yep, my C8 had a similar problem! The alarm kept going off randomly, or sometimes just wouldn't arm at all. I suspected a security breach every time it happened, scared the life out of me. Did you check the alarm controller itself?

Thanks. By alarm controller, do you mean the main vehicle security module, or is there a separate siren controller?

I mean the main security module. It was fiddly to get to, and honestly, after checking the connections looked okay, I just took it to a workshop. Best 95€ I ever spent! Probably just a loose connection like you said. Good luck fixing it!

Thanks for confirming. Sounds like my initial diagnosis may be right. I appreciate you sharing your experience. I'll visit a workshop for diagnosis and repair. It seems that the estimated repair cost of 95€ is realistic. I will share the results when it's done.