OEM part #30795031. This was only used on my car a few weeks or so due to an upgrade and I was told to state it is a factory take off by the parts department at Volvo. Volvo calls this part a rear lower spoiler or some call it a diffuser, it has 2 openings for the exhaust and is for a vehicle without parking assist. Price is $100.00 plus shipping and no charge for handling. This link will take you to the part pictures and related information. You can cut and paste the link in your browser. http://www.volvopartswebstore.com/images/parts/volvo/fullsize/GR-371670.jpg