BMW Car Alarm Siren

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=29435
Printed Date: July 14, 2025 at 2:21 PM

Topic: BMW Car Alarm Siren

Posted By: nca1
Subject: BMW Car Alarm Siren
Date Posted: March 31, 2004 at 9:14 PM

Hey! This is a great forum!

I have a dumb question, but I just love the sound of an awesome car alarm siren, but in the bmw z3's does anyone know what siren/alarm system that is? I installed my alarm system myself on my car and hate that it sounds like everyone elses it goes through 6 different tones and does a dumb high pitch beep beep when it arms and disarms.

Thanks for any help!

Replies:

Posted By: Velocity Motors
Date Posted: April 01, 2004 at 12:20 AM

Most BMW systems from the past have been Alpine's and I know the Alpine sirens do not have 6 tones. Are you sure this is a OEM BMW alarm system and not just a dealer installed aftermarket system ? The 6 tone sirens are aftermarket in most cases ( I could be wrong ).

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: jimmeezgolfvr6
Date Posted: April 01, 2004 at 7:26 AM

jeff, i highly doubt that you're wrong.

i have yet to see an OEM bmw alarm system that has a six tone siren. maybe a substitution of that original siren was made somewhere along the way, or like jeff said, it's not a OEM alarm system in there. in any case, just find a siren with the sound that you like, and replace the existing one.

good luck!

Posted By: Velocity Motors
Date Posted: April 01, 2004 at 9:08 AM

Just a reminder to ensure that the output from the alarm and the new siren are the same polarity. What I mean by that is some sirens require a (+) signal from the alarm while the other wire is grounded and other's are the opposite where you have a (-) signal coming from the alarm and the other siren wire has to be on 12 volts.

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

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