Oxygen Sensor
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Bosch Oxygen Sensor

Part No. 13847 Warranty Details  
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Bosch leads the way in oxygen sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.

Product Features:
  • Double laser-welded stainless steel body protects against contamination
  • Seared protection tube due to 100% functional quality test
  • Pre-coated threads with anti-seize compound right out of the box
  • True Direct-fit OE connectors and harness
  • Performance meets or exceeds OE specifications
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Connector Gender:Male
Length:15.7 in
Overall Length:16.9 in
Wire Harness Length:13.6 in
Wire Quantity:4

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3 Questions | 3 Answers
Displaying questions 1-3
  • Q:

    So what is the difference between the downstream and upstream O2 sensors on a 04 Chevy Trailblazer, and, how do I tell what is bank 1 and what is bank 2?
    Asked on 11/29/2014 by Dave from Springfield, Va

    1 answer



      I'm happy to help, Dave! On all vehicles, including your 2004 Chevrolet Trailblazer 4.2L L6, the upstream sensors are located before the catalytic converter and the downstream sensors are located after the catalytic converter. Upstream sensors monitor the air/fuel ratio coming directly out of the engine and the downstream sensors monitor how effectively the cataytic converter(s) is/are working. With the 4.2L L6 there is only one bank.

      When you replace your O2 sensors, don't forget to pick up some rust penetrant, such as PB B'Laster (Part No. 16-PB), and an oxygen sensor wrench such as, Autocraft Offset Oxygen Sensor Wrench (Part No. AC679), to ease your removal and installation process.

      Answered on 12/9/2014 by Heath, ASE Parts Specialist from AAP
  • Q:

    If this item is not replaced what problem will it cause.
    Asked on 1/15/2011 by lo from florida

    1 answer



      Rough idle, no change in the voltage, emissions, exhaust temperatures will rise and your catalytic converter can destroy itself are the major signs of a defective Oxygen Sensor.

      Answered on 4/11/2011 by David the Dynamite Parts Guy from AAP
  • Q:

    Hello there i replace my 02 sensor and for some reason my heat in the car only 1 heat works what's up with that.
    Asked on 1/5/2011 by sam from queens ny

    1 answer



      Sounds just like a coincidence because the O2 sensor has nothing to do with the car heater. I would look into the blower motor resistor.

      Answered on 1/6/2011 by Mike the Auto Parts Master from AAP
Displaying questions 1-3

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