Name:Front & Rear Oxygen Sensor Type:Upstream Oxygen Sensor+Downstream Oxygen Sensor Item Part Number: 17014, SG1170 Sensor Type:Piezoelectric Type:Heating Type Number:5S4265, 1564430, OS1651, SU6322, OS1651, 752773, REA1169, SU6322 06A906262CN, 2133064, 2344808, 25604 Fit:For A4 A8 Golf Compatible part number: Upstream oxygen sensor: 17014, 5S4265, 1564430, OS1651, SU6322, OS1651, 752773, REA1169, SU6322 Downstream oxygen sensor: SG1170, 06A906262AJ, 06A906262BG, 06A906262BM, 06C906265L, 06A906262F, 06A906262CN, 2133064, 2344808, 25604 Fits For: 2001-2006 For A4 1.8L 2001-2005 For A4 1.8L 2004-2006 For A8 Sedan 4-Door 4.2L Only fit: Engine: Only fit: Engine: Only fit: Engine: 2001-2006 For TT Base Convertible/Coupe 2-Door 1.8L Only fit: Engine: Only fit: AWW Engine: Only fit: Engine: Color: As Shown Material: Plastic+Metal Package Contents: 1 x 5 wire Upstream Oxygen Sensor 17014 1 x 4 wire Downstream Oxygen Sensor SG1170 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.