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Upgrade Cruise+Brake (S544A) to Active Cruise Control+stop&go (S5DFA) - E61 LCI '07

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Upgrade Cruise+Brake (S544A) to Active Cruise Control+stop&go (S5DFA) - E61 LCI '07

Old 11-06-2018, 09:43 AM
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Join Date: Oct 2016
Location: El Cerrito
Posts: 27
My Ride: 2009 E61
Model Year: 2009

Originally Posted by Mantelis88 View Post
OK, so today is the big day, when I finally got the acc+stop&go working, after around 7 months of the purchase of the first part.

So to sum this all up on what you need for LCI:
* The actual radar that mounts behind the front bumper [fits from LCI only]
* The plastic peace on the bumper that covers the radar
* Two sensors behind the front bumper [fits from LCI only]
* You might be needing new front bumper carrier, otherwise you will have to bolt the radar on. Same with the sensors. And the plastic foam behind the bumper does not fit. I just got rid of it, but then the shape of the bumper suffers a bit
* Control unit for the radar and the sensors [fits from LCI only]
* Wiring
* The cruise control switch, that mounts behind the steering wheel
* ACS/DCS control unit and the pump. This is almost always the case, that it needs chaining. [fits from LCI only]

After all this goes the coding. And then, you might be needing calibration of the camera as the error appears. Calibration can only be done by the dealer and even tho not all dealerships has the equipment. Luckily for me there was no need for the calibration.

Good luck!
Hello Mantelis88,

I have a 2009 E61 (Build date 09/2008) with Cruise control with braking function (S544A) and am planning to do this retrofit on mine.
As of now, I compiled a list of needed parts :-
1x LRR 66316781590
2x SRR 66316790877
1x LDM 66316784844
1x Steering column switch 61316957763
1x DSC control unit 34516783371 (Is this the only part you need to replace your stock DSC unit? I am guessing this is the part# for ASC/DSC control unit and pump)
I found the wireloom that conencts the two SRR, this loom has 3 connectors, two for each SRR and does the third one connects to LRR? What other wiring loom would I need apart from the one that goes to LDM from LRR?

Is it possible for you to read the part#s of the pump you have in your car along with the ACS/DCS (I guess this is simply DSC control unit) control unit for your retrofit?


Last edited by pavjayt; 11-06-2018 at 10:30 AM.
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