Bosch® 15109 - Premium Narrow-band Oxygen Sensor

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Product Details

Premium Narrow-band Oxygen Sensor (15109) by Bosch®. Position: Downstream. A worn-out oxygen sensor can cause engine performance problems and shorten the life of the catalytic converter. Tune-up your vehicle with an Oxygen Sensor from Bosch that is equally efficient in improving fuel efficiency and reducing harmful exhaust emissions.


Position: Downstream
Sensor Type: Heated
Connector Gender: Male
Terminal Type: Pin
Wires Quantity: 4 Wire Leads
Connector Shape: Male Pin
Installation Type: Threaded
Wrench Size: 0.88" (22 mm)
Wire Harness Length: 39" (990.6 mm)
Overall Length: 38.39" (975 mm)
Thread Diameter: 0.71" (18 mm)
Housing Material: Metal


  • OE Identical Connector
  • Compact Design
  • Improved Engine Performance
  • Increased Fuel Efficiency
  • Reduced Harmful Emissions

An oxygen sensor detects the amount of oxygen in vehicle's exhaust gases and sends a signal to the engine computer. This signal is used by the engine ECU to fine-tune the air/fuel mixture to the optimal level to ensure maximum catalyst efficiency and a long service life. A worn-out oxygen sensor can cause serious problems like excessive fuel consumption and elevated exhaust emissions as well as shorten the life of a catalytic converter and affect engine performance. Bosch oxygen sensors are the number one choice for many car makers worldwide. Each oxygen sensor by Bosch is subjected to a 1,000 degree Celsius functional test and a leak test to ensure environmental and functional robustness. Bosch oxygen sensors feature a revolutionary Bosch patented universal connection system that is fully submersible in water and protects against contamination as well as withstands extreme temperatures and engine vibration.

Bosch®, a premier global supplier of services and technology, is a privately held company headquartered in Germany. Its operations have been divided into four main business sectors that include automotive technology, industrial technology, energy and building technology, and consumer goods. Bosch products and services are designed to fascinate and improve the quality of life by offering innovative and beneficial solutions. The company offers technology worldwide that is “Invented for Life.”

Part Number:

Vehicle Fitment

3-Series 1999-2005
5-Series 1999-2003
X3 2004-2006
X5 2001-2006
Z3 1999-2002
Z4 2003-2005
Land Rover
Range Rover 2003-2005


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Bosch® 15109 - Premium Narrow-band Oxygen Sensor
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Bosch® 15109 - Premium Oxygen Sensor
I saved 50% buying Bosh from CARiD instead of NAPA or Advance Auto. Fast shipping and hassel free service.
Posted by Lloyd (Ticonderoga, NY) / July 11, 20182004 BMW X3

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