lmao, jiffy lube fools!!! don't listen to him! It's either related to an alarm, or it COULD be a piggyback box for the ecu... Look for any markings on the box, maybe open it up to see any markings in there. Also, fallow the wires to see what they hook up to. If it's all the wires going to the ecu, it probably is a piggyback unit.