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BMW Oxygen Sensor - Bosch 11787589122 320i, 320i xDrive, 328i, 328i xDrive, 528i, & more

BMW Oxygen Sensor - Bosch 11787589122 320i, 320i xDrive, 328i, 328i xDrive, 528i, & more

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$229.00 AUD
$229.00 AUD
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OE Numbers 11787589122

MFG Numbers 16239, 0258010418

540mm wire length with OE connector and heated probe

Downstream or rear oxygen sensors sniff the exhaust that is leaving the catalytic converter. The downstream oxygen sensor does not have a direct correlation with fuel trim but it is used to determine the efficiency of your BMW's catalytic converters. A failed downstream oxygen sensor will cause a check engine light to illuminate on your dash. However, codes for the downstream oxygen sensor can also be triggered by a faulty catalytic converter as well.

Oxygen Sensor

Your vehicle's oxygen sensor works with your engine control unit to optimize your engine's performance. The oxygen sensor is measure the proportion of oxygen in the exhaust sends input back to the engine control unit so it can modify the vehicle's air fuel ratio based off of it's current conditions. In doing so your Oxygen Sensor is a major part of your vehicle engine management and fuel consumption.

Oxygen Sensor Failure Symptoms

  • Reduced fuel mileage
  • Failed emissions testing
  • A check engine light
  • Poor drive-ability

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