Corrosion-resistant stainless steel construction.<BR>Porous PTFE Filter allows atmospheric oxygen to enter the sensor without permitting water or engine contaminants to seep into the casing.<BR>Double Protection Cover Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning.<BR>Stainless Steel Housing resists corrosion and contamination with a rugged, watertight body.<BR>Aluminum-Oxide Trap Layer keeps silicone and lead outside the ceramic element through DENSO exclusive design, preventing damage to the platinum electrode.<P>&nbsp;</P><!--Features --><!--Specifications --><p>Specifications</p><TABLE class=ke-zeroborder cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY></TBODY></TABLE><TABLE class=ke-zeroborder style="WIDTH: 588pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width=783 border=0><TBODY><TR><TD height=18 width=96>Year Range</TD><TD width=60>Make</TD><TD width=169>Model</TD><TD width=458>Notes</TD></TR><TR><TD height=18>2007</TD><TD>Audi</TD><TD>A8 Quattro 6.0L W12</TD><TD>Downstream; Cylinder 7,8,9; From Chassis #4E-7-017 625;</TD></TR><TR><TD height=18>2007</TD><TD>Audi</TD><TD>A8 Quattro 6.0L W12</TD><TD>Downstream; Cylinder 7,8,9; To Chassis #4E-7-017 624;</TD></TR><TR><TD height=18>2005-2006</TD><TD>Audi</TD><TD>A8 Quattro 6.0L W12</TD><TD>Downstream; Cylinder 7,8,9;</TD></TR><TR><TD height=18>2008-2009</TD><TD>Audi</TD><TD>A8 Quattro 6.0L W12</TD><TD>Downstream; Cylinder 7,8,9;</TD></TR></TBODY></TABLE><!--Package Includes --><p>Package Includes</p><UL><LI>1pcs Oxygen Sensor</LI></UL><!--Extra Info --><!--produts_compatibility -->