Sale is for one good used FREIGHTLINER A66-09449-080 -A  Exhaust Aftertreatment Control Module Wiring Harness – DEF Aftertreatment System, Chassis/Engine, Tank harness Please Refer to Photos, know that we have inspected it for any malfunctions or signs of future durability issues, we care about our customers and providing the parts they need. Rest assured, as we only sell OEM or OEM+ parts meeting or exceeding equipment standards, it is sure to last.