2006 BMW 325i Car Radio Wiring Information

Whether your an expert BMW 325i mobile electronics installer, BMW 325i fanatic, or a novice BMW 325i enthusiast with a 2006 BMW 325i, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 2006 BMW 325i vehicles are becoming increasing more difficult to identify due to the installation of more advanced factory oem electronics.

One of the most time consuming tasks with installing an after market car stereo, car radio, satellite radio, xm radio, car speakers, tweeters, car subwoofer, crossovers, audio equalizer, car amplifier, mobile amp, car amplifier, mp3 player, ipod or any car audio electronics is identifying the correct color car audio wires for your 2006 BMW 325i headlight bulb size you need for your low beam or high beam and save time. Also, find your other car light bulb sizes including your fog light, reverse light, turn signal, brake light and more. It’s that easy!

The Modified Life staff has taken all its BMW 325i car radio wiring diagrams, BMW 325i car audio wiring diagrams, BMW 325i car stereo wiring diagrams, BMW 325i car radio wiring schematics, BMW 325i car wiring diagrams and cataloged them online for use by our visitors for free. Our automotive wiring diagrams allow you to enjoy your new mobile electronics rather than spend countless hours trying to figure out which wires goes to which 2006 BMW 325i part or component.

Feel free to use any BMW 325i car stereo wiring diagram that is listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind and most of the car audio wiring diagrams listed on our enthusiast website are submitted by the Modified Life community. Use of the BMW 325i wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2006 BMW 325i.


If you have any questions pertaining to the audio system in the 2006 BMW 325i, please feel free to post it at the bottom of this page and either we will do our best to find you the information you need or hopefully someone in the Modified Life community will have the information you’re looking for.

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Adding More Information

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2006 BMW 325i Car Radio Wiring Information

Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Violet/White
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: White
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Yellow/Red
Left Front Speaker Negative Wire (-): Brown/Orange
Right Front Speaker Positive Wire (+): Black/Red
Right Front Speaker Negative Wire (-): Brown/Orange
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Yellow/Black
Left Rear Speaker Negative Wire (-): Black/Orange
Right Rear Speaker Positive Wire (+): Blue/Black
Right Rear Speaker Negative Wire (-): Brown/Orange

5 Responses

  1. Mike, run a primary wire to your steering column and use the violet/white wire in the ignition switch harness. This violet/white wire will provide you with a switched power source. We suggest you invest in some solid wire taps that wont come loose. These wire tap connectors will allow you to tap into wires without cutting and installs in seconds by hand with no crimping or tools required. If you’ve never installed car audio before, we advise you to take your car to an experienced mobile audio installer. Hope this helps. Good luck with your 2006 BMW 325i stereo installation.

  2. To show you what I mean, this is the entire radio wiring harness:

    2006 BMW 325i Factory Car Radio Wire Harness

    These are the speaker wires (i’ve spread them out to show how they’re paired):

    2006 BMW 325i Factory Car Speaker Wires

    These are the miscellaneous wires:

    2006 BMW 325i Factory Car Stereo Wires

  3. looking at the speaker wires, there are only

    *all negative wires are brown/orange…

    other wires are:
    large red/green (presumably constant)
    small gray/red (presumably switched)
    large brown (presumably negative)

    plus other miscellaneous ones non-important to what i need them for

    please help/explain…

  4. I am trying to install a aftermarket stereo in my 1992 325i and can not get the speakers to work someone had told me these cars have a amplifier that needs to be powered i can not figure out first of all where the amp is located or what wire would be the power wire for it can anyone help?

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