the camera is for the highbeam assist, not for the line departure - there is brain module that analyzes the image coming from the camera, and if the brain is programmed to do line departure, it will, but in your case, it is only programmed to do the high beam - it looks for car lights, that are at a prescribed height from the ground, and prescribed distance from each other. the algorithm deciphers that the two lights are indeed headlights of the other car, and not just street lights (even though, it gets confused a lot of times) and shuts off the high beam... it also applies to motorcycle lights and cars with one light burned - i am not a programmer, i do not know the exact algorithm...

there are sensors that are just plain light/intensity sensors, that do not require identifying an object, just need to know if there is light, and how intensive it is... those are the dimming sensor, the light sensor, the rain sensor...

so, you got the highbeam assist...

yes I believe so. Ok. The camera is obviously for high beam assist but what about the sensor on the left hand side of the mirror in my picture?

Reread my previous post, I explained it to you already.

Red: Dimms mirror & light of dashboard
Blue: Rain Sensor
Yellow: High Beam Assist


What is lane departure warning, and how does it work? | ExtremeTech

Dimming is at the front of mirror...black point! Red one is highbeam assist! That 'camera' I have on my 2008 one forum says it is ultrasonic parking sensor... I think it is acc distance sensor for automatic braking! On e53 there is no that white eye but nirrors are dimming from that black point on mirror!

Sure it is. You have ACC on you 2008 :rofl:
I have done the HBA retrofit, the red is NOT the camera for HBA

I need to do retrofit for my mirror, because I need homelink! All mirrors on ebay has no acc sensor and plastics are ordinary there not as mine... may be that is ok...may be acc sensor has separate wiring and I can get one of the home link mirror and just plug..if not, will be wasting of money!
So...what is red circle there? I have HBA as well in my car!

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LOL...why is the sensor circled in red confusing so many forum members? It is as been stated repeatedly when asked...it is one of the two EC (electro-chromatic) auto dimming sensors.

The original poster correctly identified the "black dot" on the face or the interior rear view mirror...but kept rejecting/ignoring the explanation of the EC's ambient light sensor on the back side of the mirror (faces the windshield and is the one circled in red).

The auto dimming of the interior rear view mirror (and the side mirrors if optioned) uses both the front and rear facing sensors to operate with in its prescribed parameters. The sensor (circled in red) which faces the windshield is an ambient light sensor...it regulates the intensity at which the auto-dimming will occur. The ambient light sensor will adjust the dimming parameters lighter or darker when headlights from a vehicle behind the car shine on the sensor embedded on the face of the mirror. The dimming affect is not as dark when in an urban/city environment with well lit streets versus a dark unlit road/highway.

You can see the ambient light sensor in the same location of an interior EC mirror used PRIOR to the additional technology of high beam assist and rain sensors, etc:

Sorry my fault...did not read all explanations :)
But my question still remains! I am not at home right now for one month...and I am thonking to purchase home link mirror with compass! But I am not sure about wiring now! That sensor in plastic mirror holder...can I get home link mirror and I shall plug in sensor as well? I have not seen in my life those connections!

I have this mirror:
https://uploads.tapatalk-cdn.com/201...f228bcbb5c.jpg
https://uploads.tapatalk-cdn.com/201...831623c30a.jpg

But on ebay all of them like this:
https://uploads.tapatalk-cdn.com/201...dd4e2c7d45.jpg

Can I retrofit sensor system on homelink mirror...

Is this for an e53 or e70 X5? If e53...some of the features like highbeam and lane departure probably won't work since the e70 uses a totally different communication bus.

But for an e53...you can add mirror with HOMELINK buttons or auto dimming because they only require 12volt power and are independently contained in the mirror. Those features don't communicate with a control module somewhere else in the com-bus.

If you have an e70...again the HOMELINK and auto dim is located in the mirror, so only 12 volts needed to operate...which should be already in wiring harness. The side mirrors though...will not dim if they aren't EC and connected to the interior mirror through the wiring harness running to the door (or however the e70 sends data over its com-bus).

If you have an e70...then some of the options mentioned in this thread like lane departure and highbeam assist may require more since it involves communication with other components outside the mirror or components located on the windshield (rain & light sensors).