Item Part Number: 11787558073, 11787558055, 11787545075, 11787545074 Color: As Shown Material: ABS + Metal Compatible Part Numbers: 11787558073, 2345138, 24333, 11787540166, 11787540167, 11787557223, 11787558081, 11787558087, 11787589138, 11787558055, 2345139, 24322, 0035427218, 11787557756, 11787545074, 2344876, 25676, 11787526262, 11787545244, 11787569968, 11787614322, 11787545075, 2344892, 25613, 11787539137, 11787544655, 11787545243 Package Included: 4 x Oxygen Sensors 1 x 11787558055 (5-wire oxygen sensor): Upstream Front, Cylinder 1-3, before catalytic converter 1 x 11787558073 (5-wire oxygen sensor): Upstream Rear, Cylinders 4-6, before catalytic converter 1 x 11787545074 (4-wire oxygen sensor): Downstream Front, Cylinders 1-3, after catalytic converter 1 x 11787545075 (4-wire oxygen sensor): Downstream Rear, Cylinders 4-6, after catalytic converter Fits For: 128i 2008–2013 E82, E88 328i 2007–2011 E90, E91, E92, E93; 2012 E91, E92, E93; 2013 E92, E93 328i xDrive 2009–2011 E90, E91, E92; 2012 E91, E92; 2013 E92 328xi 2007–2008 E90, E91, E92 X3 2007–2008 E83; 3.0si 2009–2010 E83; xDrive30i X5 2007–2008 3.0si; 2009–2010 3.0si; xDrive30i Package Contents: 4 x Oxygen Sensor Note: This package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations in the color of the item shown in the picture compared to the actual product. Measurement may vary by 1-3 cm due to manual measuring.