As above the CD changer is disconnected and can be removed. There's a 6 pin and a 3 pin connector for. That's for just music playback and control - no phone functionality.
The top module is the ULF or TCU (Bluetooth). You'll need a cable to adapt from that 54 pin connector to the BlueBus.
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Yes I am sure you and I have the exact same optioned car, basically fully loaded. It'll work perfectly fine.Originally posted by Flow View PostThank you for your answer ! I'll wait for more details
When you use the CD changer connector, does a phone call still take priority when listening to the radio ? Is there any drawback ?
I'm kind of sad to loose the CD changer, it's kind of vintage and fun. I like my tape deck behind the nav screen too lol.
Happy to lose the cd changer lol
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Thank you for your answer ! I'll wait for more details
When you use the CD changer connector, does a phone call still take priority when listening to the radio ? Is there any drawback ?
I'm kind of sad to loose the CD changer, it's kind of vintage and fun. I like my tape deck behind the nav screen too lol.
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im sure tedbm3 will chime in but your car is the exact same as mine (euro spec) You plug the Bluebus into the CD changer connectors. You cannot use the CD Changer after that.Originally posted by Flow View PostHey everyone !
I'd like to buy a Bluebus adapter for my car with the telephone cable but I am not sure of what phone adapter to buy ?
I looked in the trunk but did not find any connector as described on the bluebus website.
Here are a couple of pictures of the electronics in the trunk.
Is there anyone knowledgeable that could tell me what phone cable adapter I need ?







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Hey everyone !
I'd like to buy a Bluebus adapter for my car with the telephone cable but I am not sure of what phone adapter to buy ?
I looked in the trunk but did not find any connector as described on the bluebus website.
Here are a couple of pictures of the electronics in the trunk.
Is there anyone knowledgeable that could tell me what phone cable adapter I need ?






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Has anyone successfully installed a Bluebus module without having the pre-wiring for a CD changer? I have torn my entire trunk apart and now realizing my Canadian M3 is not pre-wired.
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Looks like a ground loop isolator. I use one on my factory AUX connector and bluetooth adapter, as sometimes the stock radio switches from the aux back to radio randomly without itOriginally posted by LSB__M3 View PostAny idea what this aux adapter is plugged into my 6 pin? I just purchased this second-hand and unsure of this extra adapter. Any thoughts?
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Any idea what this aux adapter is plugged into my 6 pin? I just purchased this second-hand and unsure of this extra adapter. Any thoughts?2 Photos
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Has anyone experienced issues with dimming of the dash lights after installing the BlueBus? I thought it was my LCM going bad so I replaced it and no luck. Driving at night my dash lights are stuck at full dim with the odometer info and SMG lights at full bright.
UPDATE: I did some troubleshooting and started with pulling fuses 7,39 and 41. The dash lights dim properly using both the new and my original LCM. I will proceed with unplugging the BlueBus and the CarPlay unit from Carphonic’s to see which one is causing the problem.
FIXED: Turns out it was the"Parking Lamps" feature, it was turned ON in the BlueBus settings. I did an update from Baris when I installed my CarPlay and apparently it turned itself "ON". All lights dim properly with both my original and extra LCM modules.
LCM Issue: https://github.com/tedsalmon/BlueBus/issues/166
Last edited by WOLFN8TR; 07-29-2025, 09:33 PM.
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Up & running! Mostly was making things harder for myself than necessary but in my defense, there was some well done aftermarket wiring that I overlooked and caused some rework.
Now I'm motivated to finally do the Bavsound upgrade that has been sitting around. ...as soon as the heat breaks.
Thanks for the help!
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That plug is probably the other end of what you had to disconnect the three and six pin from in the trunk. I would leave it be.Originally posted by Keith_MN View Post
No worries, I knew you were out and this certainly isn't a priority.
All the audio components have been reinstalled. Bluebus plugged in and the blue light comes on but not getting any indication of it at the head unit or bluetooth populating. Cycled the key several times, drove it once, repositioned it, etc, still nothing. AM/FM stereo works.
I found this plug in the glovebox which I will attempt to trace, not sure if it's related to what was plugged in in the trunk but seems like it may be. That's the next order of business but likely not until next week. Posting in case someone recognizes this...
What is the blue LED on the unit doing? Solid or blinking?
Thanks!
-Ted
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The 3 pin is the ibus and power for the Bluebus. 6 pin is the audio only. The 3 pin alone should be enough for the head unit to be able to indicate it's working. You have to change source using the "Mode" button to what would have been the CD changer. It doesn't show as a new menu or anything.
On my factory nav car it's after the AM/FM source so it should cycle through "AM/FM" -> "CDC" which is now the BlueBus but might show as CDC and then change to Bluetooth -> "CD"/"Tape" (in the head unit) -> "Aux" (if adapter is fitted) -> "AM/FM". I presume non nav cars are basically the same in that respect."
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No worries, I knew you were out and this certainly isn't a priority.Originally posted by t3ddftw View Post
Sorry for the lag -- currently on our yearly family vacation
-Ted
All the audio components have been reinstalled. Bluebus plugged in and the blue light comes on but not getting any indication of it at the head unit or bluetooth populating. Cycled the key several times, drove it once, repositioned it, etc, still nothing. AM/FM stereo works.
I found this plug in the glovebox which I will attempt to trace, not sure if it's related to what was plugged in in the trunk but seems like it may be. That's the next order of business but likely not until next week. Posting in case someone recognizes this...
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Thanks, George!!Originally posted by George Hill View Post
Ted, that is awesome! Exciting transition, I'm rooting for you!
You found them, but it wasn't clear because someone plugged something aftermarket into them:Originally posted by Keith_MN View PostTore all the audio componentry out of the trunk and have the same question. The bundled up unused harness has the 3 pin connector that fits. There is no sign of the 6 pin connector.
The two connectors in the trunk closest to the front of the car (pic 1000053908) has both the 3pin & 6 pin connectors that fit, but I don't think that's what I'm supposed to be using. Tried it just to see and no luck.
I don't really know what to try next here... Doesn't appear to be any modifications to the harness by previous owners. Anyone else have a 6 pin connector they couldn't locate?
Use those for the BlueBus, not the three pin you found in the telephony bundle.
Sorry for the lag -- currently on our yearly family vacation
-Ted
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