Oxygen Sensor - Bank 2, Sensor 1 - N62 Engine

Bosch Oxygen Sensor - Bank 2 - Before Catalytic Converter

This Oxygen Sensor is used on the N62 and N73 Engines in models such as E60 550i, E63 650i, E65 750i, E66 750Li/760Li, and E70 X5 4.8i

The pre-cat O2 sensors tell the engine computer how well the engine is working (note: not how clean it is, that's the post-cat sensor). The pre-cat sensors give the ECU feedback on the engine tuning - if it's running lean or rich - and the ECU makes adjustments based on their data. Each bank of cylinders has its own sensor before and after the catalytic converters. The ECU adjusts fuel injection based on the data so the sensors also affect fuel economy in addition to performance. An integrated heater circuit helps prolong the life of the sensor but can also fail and give a check engine light.

Signs of an O2 sensor failure include decreased fuel economy, lack of torque, and fault codes for the sensor(s). It is a good idea to replace the O2 sensors at regular intervals rather than waiting for a failure. Since their performance degrades over time you may not even notice the loss in performance or economy. Since the complete O2 sensor is part of the emissions system, a bad sensor may not set multiple OBD Readiness flags.

This part is listed by BMW as BMW part number 11787557223 and is described as Oxygen Sensor N62/N73 11-78-7-557-223. 

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.

BMW Fitments:

5 Series
E60 / E61 (04-10) > 550i
6 Series
E63 / E64 (04-10) > 650i
7 Series
E65 / E66 (02-08) > 750Li
E65 / E66 (02-08) > 750i
E65 / E66 (02-08) > 760Li
X5 Series
E70 X5 (07-13) > X5 4.8i