So anyone know what that is? It looks like it's the electrical wiring for one of the 02 sensors to me. I honestly have no clue. All I really want to know is will it damage the car and how do I put it back in its proper place.
+2 - It's the O2 Sensor Wire Harness. If it's the one on the passenger side (which it appears to be), you can remove the battery and battery tray and have really good access to reach at this harness to get it properly tie-banded/secured (on the backside of the block there is a bracket).