Oxygen Sensor
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Bosch Oxygen Sensor

Part No. 16978 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
Sensor Type:Heated
Wire Quantity:4

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

    Is this a replacement for Bank1 Sensor3?

    (2004 VW Jetta GL 2.0L)
    Asked on 1/1/2015 by Michael Femia from Sherrill, NY

    1 answer



      I'm happy to help, Michael! This Bosch Oxygen Sensor (Part No. 16978) is the upstream sensor for a 2004 Volkswagen Jetta GL 2.0L L4. This information is located under the Product Application(s) heading in the Description tab when the vehicle information is entered into the website.

      Volkswagen had four 2.0L L4 engines for this model year. From my research, I see that the BBW engine code had 3 oxygen sensors, one heated pre-catalytic converter, one in the center of the catalytic converter and one post catalytic converter. This oxygen sensor does not fit vehicles with this engine. Bosch Oxygen Sensor (Part No. 16075) is the downstream post catalytic converter oxygen sensor (sensor 3). Bosch Premium Oxygen Sensor with OE SmartLink™ (Part No. 15733) may also work if you would prefer a universal design.

      Rust penetrant, such as PB B'Laster (Part No. 16-PB) and an Autocraft Offset Oxygen Sensor Wrench (Part No. AC679) can make this project easier. I also suggest a repair manual for your vehicle for replacement instructions for this an many other projects. It can also help you to locate your engine code, Haynes Part No. 96018 or Chilton Part No. 70403.

      Answered on 1/8/2015 by Heath, ASE Parts Specialist from AAP
  • Q:

    Asked on 8/11/2014 by JEN'S CAR from CHESTERFIELD, VA

    1 answer



      I'd be happy to help you with that! This sensor is not a fit for a 1999 model. I checked the sensors for the 1999 model and none state whether they are specific to an earlier or later model in the year. This sensor does fit the 2000 model, but I am not able to guarantee a fit for a 1999. If there is a difference between the earlier and later manufacturing dates for the parts to fit, our catalog usually states the difference. I would recommend the one for the 1999 year since you have a 1999 model. If you have doubts, I would recommend checking with a VW dealership. If you can get the OEM part number, we can cross reference it for you.

      Answered on 8/16/2014 by K from AAP
  • Q:

    is this before or after the cat.
    Asked on 4/9/2014 by justin from elma ny 14059

    1 answer



      Hi justin, I'm glad to assist you! This is a downstream oxygen sensor, downstream is after the catalytic converter.

      Answered on 4/9/2014 by Steve from AAP
Displaying questions 1-3

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