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      09-25-2019, 04:51 PM   #7

Drives: 2014 435i xDrive
Join Date: May 2019
Location: Sammamish, WA

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2014 435i xDrive  [0.00]
2014 X5  [0.00]
Originally Posted by CharlieF576 View Post
- How does S544A Dynamic Cruise Control differ from the normal cruise control with brake function?

- If I wanted to retrofit/code active cruise control with stop and go, would I need extra hardware (I assume the steering wheel controls) or is it only coding at this point?
S544A IS cruise control with brake function. Retrofitting ACC requires at a minimum:

* DSC pump
* Radar
* Steering wheel switches

The DSC pump and ICM must be from a car that had this option, coding is not enough. You'll also need the bumper mounting hardware for the radar, wiring harness, and wheel speed sensors for the front and rear (I've read anecdotally that these may not be required).

I'm in the process of retrofitting this right now, cost of parts all together has been around $1800. Finding a DSC pump from a car with ACC was the hardest part, once I found that I purchased the rest.

You can use this site to determine what parts are required for a given option: