I just get a communication failure using the Tactrix interface. Someone else checked for me with a Mongoose knock-off cable and they weren't able to connect either (not accessable error). Seems like this should work as I don't find any other complaints on the web. But maybe it only works with the original Mongoose cable? I can get to other things like ABS, Warnings, TPMS, and others using the Tactrix and TIS 5.0, just errors everytime I try to get into Smart Keys.