Originally Posted by bbaxter18

Hi guys, long time lurker, i always seem to find the answers im looking for but this time i suppose its more of an opinion and words of wisdom. Another thread i found Via google here linked to a retrofitting guide(not OE instructions) for PDC on the E53 but the link is dead.

So i managed to come across A PDC module, 8 sensors, center button, and rear gong, as well as the AHM module and trailer connector(7pin Pigtail) at the local junkyard. I appear to be prewired for both, as i have already installed them in the battery bin. After connecting only the modules, the PDC alerts me of an issue(sensors are disconnected), and I dont have a test connector for the 7pin trailer harness so no way to verify it.

When i look at the PDC with INPA, it is found but with NCSExpert it is not, which brings me to my question. Should i use NCSexpert to edit my VO to include PDC and AHM, OR Should i use ISTA/P to retrofit the two modules?

Im comfortable with normal coding functions with NCSexpert/Dummy, but havent done a VO change. I have not used WinKFP. As for ISTA, im growing more comfortable with it but i have not used it for any kind of programming only Diagnostics and Info Stuffs. When I was poking around with ISTA/P it seemed like it wanted to update ALL of my modules, and thats a bit overwhelming for a first use. I believe it wanted to update both the KOMBI and EWS for the PDC retrofit, which is still a bit of a nail biter for me.

As for the AHM, I cant seem to find it listed in NCSdummy as a coding option, and didnt find the module with ISTA or INPA. Does anyone know why? I may be missing a fuse somewhere in the vehicle so it may not be powered but that doesnt explain why i cant find a file for it in NCSDummy.

And finally, Is there anything i can do to create a backup or can i pull all of that data from NCSExpert incase something goes wrong? Incase it isnt listed, this is all for an 04 X5, 4.4i, Pre FL i believe (08/2004 Build date) as it doesnt have the recesses in the front bumper for the corner PDC sensors, last 7 of the Vin is lv09366. Thanks everyone.