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Old 10-18-2016, 12:51 PM   #1
BMOne
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Alarm options for e46 maybe without wiring?

Hi

I can't see any green alarm tab in the trunk does this mean i don't have prewiring? Is it hard to rewire for factory alarm?

Best options for alarm?

I read that those autostart vipers are hard to install but it would be nice to have 2 way pager.

Thanks in advance
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Old 10-18-2016, 01:33 PM   #2
nealfromnz
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Just do the factory siren and bonnet switch and code in factory alarm.
Would mean custom wiring. But you won't need to run microwave and tilt sensor wiring.

Looms / harness is no longer available for alarm retro fit.
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Old 10-18-2016, 01:43 PM   #3
jdstrickland
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Green tab? You should see round buttons (I forget where, exactly) in the trunk that say, PRE-WIRED FOR SECURITY, PRE-WIRED FOR PHONE, PRE-WIRED FOR CD CHANGER, that sort of thing. The object of your desire is the one about security, all of them should be grouped in the same place.

In the center of the roof on the inside of the car is (should be) a cover that you can pop off. There is a connector inside of this cover for a component of the alarm system. There is a connector in the engine bay to plug the siren into. If you don't have the cover in the roof (headliner), or there is no connector inside of it, then you do not have the pre-wire. My daughter installed the BMW alarm system into her car in about 30 minutes.
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Old 10-18-2016, 02:10 PM   #4
nealfromnz
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Not all e46s wired. More like 6 hour job to retrofit harness and ternate into power distribution system.
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Old 10-18-2016, 02:29 PM   #5
BMOne
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Thanks for the replies guys I'll have a closer looks with the new i info.
In the centre of the roof you mean inside the light cover?

Anyone know where exactly in the trunk they should be?
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Old 10-18-2016, 02:41 PM   #6
naimadd
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in the center of the roof means in the middle of the headliner of your car there is a square vented panel. pry it off and there should be a harness tucked into a dummy plug. in the trunk it should be right above the battery behind the carpet liner.
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Old 10-18-2016, 02:48 PM   #7
All2kool
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Quote:
Originally Posted by BMOne View Post
Thanks for the replies guys I'll have a closer looks with the new i info.
In the centre of the roof you mean inside the light cover?

Anyone know where exactly in the trunk they should be?
Trunk liner, left side. If you don't see the emblem for Security, it is not pre-wired.
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Old 10-18-2016, 02:51 PM   #8
jdstrickland
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Quote:
Originally Posted by BMOne View Post
Thanks for the replies guys I'll have a closer looks with the new i info.
In the centre of the roof you mean inside the light cover?

Anyone know where exactly in the trunk they should be?
Yes, the light. Except there's not really a light there, is there? There is a square cover with vent holes/slots cut into it. Pry the cover off, if there is an empty connector, then you should be ready for the security system.

All the security system is, is a siren and a motion/tilt sensor. The car already -- factory default -- locks the ignition (engine bypass) when the doors are locked.

TEST
Leave the window down and lock the door from the outside. Reach in with the key and start the car. It will not start. Also, while the car is locked, reach in and operate the door handle to unlock the door, it does not unlock. Use the door lock button on the console to unlock the doors, it does not work. If the car is locked from the outside, it will not unlock again until the key tells it to, and it will not start unless it is told to unlock first. Your is as secure as it will ever be, the security system only makes it scream at the top of its lungs that someone is trying to take it.
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Old 10-19-2016, 09:00 AM   #9
markusmarkus
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Originally Posted by nealfromnz View Post
Not all e46s wired. More like 6 hour job to retrofit harness and ternate into power distribution system.

All E46s sold in the USA are wired for the alarm.
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Old 10-19-2016, 09:02 AM   #10
markusmarkus
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Originally Posted by BMOne View Post
Thanks for the replies guys I'll have a closer looks with the new i info.
In the centre of the roof you mean inside the light cover?

Anyone know where exactly in the trunk they should be?

Yes, that cover hides the mounting point for the ultrasonic sensor. There's a plug stuffed in there.

To what is the last sentence referring?
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Old 10-19-2016, 10:54 AM   #11
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So i had a closer look, Theres nothing in the middle of the roof except the sunroof. This is a coupe model btw. Theres a a long box thing at the back of the roof but i think this is for the back centre light. I will take a few pics of the roof and trunk later on today.
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Old 10-23-2016, 09:48 AM   #12
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It's been raining here but I finally had time to take some pics of anything on the roof that might contain the alarm wiring and in the trunk too.

I've already got the stacker and i don't see any other tabs except that green one which i have no idea what it's for

Let me know if you guys see anything or if you want me to take pics of something else
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Old 10-25-2016, 11:04 PM   #13
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Bump
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Old 10-25-2016, 11:08 PM   #14
naimadd
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Quote:
Originally Posted by BMOne View Post
Bump
Quote:
Originally Posted by BMOne View Post
It's been raining here but I finally had time to take some pics of anything on the roof that might contain the alarm wiring and in the trunk too.

I've already got the stacker and i don't see any other tabs except that green one which i have no idea what it's for

Let me know if you guys see anything or if you want me to take pics of something else
behind the carpet liner with the green button in your third picture should be a wiring loom. There should be an extra harness wrapped with cloth tape for your tilt sensor. The other harness is behind your engine firewall on the passenger side where your blower motor is. This one is your the actual alarm speaker. I don't think coupes have the motion sensor in the head liner

Sent from my E5823 using Tapatalk

Last edited by naimadd; 10-25-2016 at 11:10 PM.
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Old 10-25-2016, 11:18 PM   #15
BMOne
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Quote:
Originally Posted by naimadd View Post
behind the carpet liner with the green button in your third picture should be a wiring loom. There should be an extra harness wrapped with cloth tape for your tilt sensor. The other harness is behind your engine firewall on the passenger side where your blower motor is. This one is your the actual alarm speaker. I don't think coupes have the motion sensor in the head liner

Sent from my E5823 using Tapatalk
Thanks I'll have another look
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