Pre cat oxygen sensor. Located before the catalytic converter. Select O2 sensor location from the menu. Made by Bosch OEM.
Part# 11 78 7 558 055 Pre cat in front manifold.Cyl 1-3 (1400mm length)
Part# 11 78 7 558 073 Pre cat in rear manifold. Cyl 4-6 (910mm length)
Cross Reference:
11787558055
11787558073
17098
17099
0-258-017-099
525i 2006-2007 \/ Pre Cat Front Manifold.Cyl 1-3 (1400mm),525i 2006-2007 \/ Pre Cat Rear Manifold.Cyl 4-6 (910mm),525xi 2006-2007 \/ Pre Cat Front Manifold.Cyl 1-3 (1400mm),525xi 2006-2007 \/ Pre Cat Rear Manifold.Cyl 4-6 (910mm),528i 2008-2010 \/ Pre Cat Front Manifold.Cyl 1-3 (1400mm),528i 2008-2010 \/ Pre Cat Rear Manifold.Cyl 4-6 (910mm),528xi 2008 \/ Pre Cat Front Manifold.Cyl 1-3 (1400mm),528xi 2008 \/ Pre Cat Rear Manifold.Cyl 4-6 (910mm),528i xDrive 2009-2010 \/ Pre Cat Front Manifold.Cyl 1-3 (1400mm),528i xDrive 2009-2010 \/ Pre Cat Rear Manifold.Cyl 4-6 (910mm),530i 2006-2007 \/ Pre Cat Front Manifold.Cyl 1-3 (1400mm),530i 2006-2007 \/ Pre Cat Rear Manifold.Cyl 4-6 (910mm),530xi 2006-2007 \/ Pre Cat Front Manifold.Cyl 1-3 (1400mm),530xi 2006-2007 \/ Pre Cat Rear Manifold.Cyl 4-6 (910mm)
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