4Pcs O2 Oxygen Sensor Upstream & Downstream For Audi A4 A6 A4 A6 Quattro 3.0L

table.tableizer-table { font-size: 12px; border: 1px solid #CCC; font-family: Arial, Helvetica, sans-serif; } .tableizer-table td { padding: 4px; margin: 3px; border: 1px solid #CCC; } .tableizer-table th { background-color: #104E8B; color: #FFF; font-weight: bold; } Make Model Engine Year Notes AUDI A4 V6-3.0 2004-2002 2Pcs Upstream + 2Pcs Downstream AUDI A4 QUATTRO V6-3.0 2004-2002 2Pcs Upstream + 2Pcs Downstream AUDI A6 V6-3.0 2004-2002 2Pcs Upstream + 2Pcs Downstream AUDI A6 QUATTRO V6-3.0 2004-2002 2Pcs Upstream + 2Pcs Downstream AUDI ALLROAD QUATTRO V8-4.2 2005-2003 2Pcs Upstream + 2Pcs Downstream AUDI S4 V8-4.2 2009-2004 2Pcs Upstream + 2Pcs Downstream