Roundozo said:If by hydro you mean the ABS pump and attached ECU, does the E46 one fit? The z4 is basically an E46 with new body panels. I've got an ABS module for an E46 in my shed so I can try and find a part number off of it if you like.
You need to take to have the fault codes read if you haven't the equipment .tazzfalcon said:I have the DTC and Handbrake lights (orange) coming on intermittently (no ABS light fortunately), not due to bumps that I can tell but both times it's happened after an hour or so of driving and both times it's cleared after some random time (I don't take it out often).
The manual says having these two together mean the DSC/DTC both disabled but still OK to drive.
Sensor on the way out maybe?
I had one repaired by them on an Audi s4 , quick turn around and good service with any problems after , plus you already know how to take it off and replace it , so you'll save on any fitting costs .Z8Cookie said:Update. Disconnected the multipin connector from the hydro unit and gave the unit a few "taps" for the heck of it, despite no codes showing on my scan gauge, I did a forced code clear and the lights went off as soon as I drove away. Not holding out for them staying off more more than a couple of miles though. I have found a link to a company that will fix your hydro unit with a week turnaround for £250. http://www.ecutesting.com/catalogue/product/bmw_z4_abs_pump__ecumodule_combined_amc916203.html