dei 507m problem

It sounds like you also have a specific security controller installed.  I'm using my OEM controllers and so the Aux etc functions aren't available -- it's just a hardwire.

That's a good question on possible issues associated with the 506T and the windows down.  I normally leave them in a top-open vent mode rather than fully down.  Still, it's something I need to keep an eye on.  This is my first experience with electronic security sensors, so I'm in learn mode.  That also goes for the "glue" I apply -- sometimes it doesn't work entirely as anticipated :).

My thinking regarding 504D attachment was to go for maximum impulse delivery (max suspended magnet movement at time of "shock").  My expectation is the softer the mounting, the less energy delivery, and so reduced likelihood of detection.  It's too bad DEI doesn't provide specific installation tips since ultimately, the nature of the sensing determines the optimal mount.  Eg -- is a taller primary impulse better or worse than a series of distinctly smaller vibration impulses?  All I know is I can fairly lightly rap my bumper and have the warning horn blow -- my guess is that's OK.

The Proximity Sensor seems perfect for a show situation (ie. "keep away"), but I'm not so sure for around town.  Though as you say, with the right controller functions it could be more flexible.

PS.  The 507M for the 2008 xB arrived today, so I've got to get the "glue" box built (GWA) so I can install and test it. Hopefully, it will be as well behaved as the one now installed in the Eclipse :)!

Just a follow up on the 504D install:

Thanks "jcs091570" -- between your and others inputs, I changed my mount to velcro and am glad I did.  Not only is it much more sensitive, but more importantly to me, the response is more uniform around the vehicle.  Thanks also for your other comments -- something to think about :)!