N54 OEM Oxygen (O2) Sensors - Before Catalyst

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$289.00
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Set of (2) Bosch OEM Oxygen Sensors (before catalyst) for BMW N54 engines. 

(1) Oxygen Sensor - Part Number 11 78 7 558 055

--Front before catalyst 

(1) Oxygen Sensor - Part Number 11 78 7 558 087

--Rear before catalyst

This set of before catalyst O2 sensors will fit the following BMW N54 engines:

2008-2010 BMW 135i

2007-2010 BMW 335i

2009-2016 BMW Z4 35i