This Oxygen O2 Sensor is a new, aftermarket replacement part that has the following specifications:

  • Four pin, 4 wire configuration
  • 2 Bolt flange style sensor
  • Upstream & Downstream Sensor as listed per applications
    • May be used in more then one position
  • Replaces dealer part numbers: 8946509040, 8946509110, 8946509170, 8946509180, 8946509320, 8946539655, 8946539735, 8946539835, 8946539855, 8946569175, 8946580011, 8946580034
  • Direct Fit
  • Correct Connector No cutting or splicing
  • Built and tested to strict quality control standards
  • Includes removal and installation tool

Note: For clarification purposes:

  • Upstream location is between the catalytic converter and the engine
  • Downstream location is between the catalytic converter and the tailpipe

A direct replacement. If you have a bad O2 sensor causing your vehicle to idle poorly or fail an emission test then this is the part for you.

Our electrical and electronic parts are subject to strict quality control testing .  Once the item has been installed or plugged in, it is no longer eligible for a refund.  The item may be eligible for replacement, only if it is found to have a manufacturing defect. Before purchasing, please ensure proper diagnosis of the failed original part is performed

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

  1. step : Identifying your Oxygen Sensors (0:57)
    • Upstream oxygen sensors are located in between the engine and the catalytic converter
    • Downstream oxygen sensors are located in the catalytic converter or farther away from the engine than the catalytic converter
    • Locate your vehicle's firing order diagram
    • The bank that contains cylinder one is bank one
    • The bank that does not contain cylinder one is bank two, even if it does not contain cylinder two

Tools needed for replacement:

    1A - No Tools Needed

  • No Tools Needed

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My truck was built on 8/04. Will your product won't work since not BEFORE 8/04?
Matt C on Apr 3, 2016
BEST ANSWER: This part is specific to vehicles with a particular set of options. We will need more information about your vehicle to confirm the fit. Please feel free to call our customer service department for clarification @ 888-844-3393.

How-to Video:

(03:08 min)

Tools List:

    1A - No Tools Needed

  • No Tools Needed




Vehicle Fit

  • 1998-2005 Lexus LX470 Downstream O2 Oxygen Sensor with Install Tool
  • 1994 Toyota 4Runner Downstream O2 Oxygen Sensor with Install Tool V6 3.0L for Models with California Emissions
  • 1995 Toyota 4Runner Downstream O2 Oxygen Sensor with Install Tool V6 3.0L for Models with California Emissions (Built Before 10/31/95 Production Date)
  • 1996-2000 Toyota 4Runner Upstream O2 Oxygen Sensor with Install Tool L4 2.7L excluding California Emissions
  • 1996 Toyota 4Runner Downstream 4 Wheel Drive O2 Oxygen Sensor with Install Tool L4 2.7L Manual Transmission (Built After 11/95 Production Date)
  • 1996 Toyota 4Runner Downstream 4 Wheel Drive O2 Oxygen Sensor with Install Tool V6 3.4L (Built After 11/95 Production Date)
  • 1996-2000 Toyota 4Runner Upstream O2 Oxygen Sensor with Install Tool V6 3.4L excluding California Emissions
  • 1997-2000 Toyota 4Runner Downstream 4 Wheel Drive O2 Oxygen Sensor with Install Tool L4 2.7L Manual Transmission
  • 1997-2000 Toyota 4Runner Downstream 4 Wheel Drive O2 Oxygen Sensor with Install Tool V6 3.4L
  • 1998 Toyota Land Cruiser Downstream O2 Oxygen Sensor with Install Tool (Built After 1/98 Production Date)
  • 1999-2004 Toyota Land Cruiser Downstream O2 Oxygen Sensor with Install Tool
  • 1993-1995 Toyota Pickup Downstream (US Built Models) 2 Wheel Drive O2 Oxygen Sensor with Install Tool L4 2.4L California Emissions
  • 1993-1995 Toyota Pickup Downstream 4 Wheel Drive (US Built Models) O2 Oxygen Sensor with Install Tool L4 2.4L with with 6 Foot Bed California Emissions
  • 1995 Toyota Pickup Downstream O2 Oxygen Sensor with Install Tool V6 3.0L California Emissions
  • 2001-2003 Toyota Sequoia Downstream O2 Oxygen Sensor with Install Tool
  • 2004 Toyota Sequoia Downstream O2 Oxygen Sensor with Install Tool (Built Before 8/04 Production Date)
  • 1994-1998 Toyota T100 Upstream O2 Oxygen Sensor with Install Tool L4 2.7L Automatic Transmission with
  • 1994-1998 Toyota T100 Downstream O2 Oxygen Sensor with Install Tool L4 2.7L
  • 1994 Toyota T100 Upstream O2 Oxygen Sensor with Install Tool V6 3.4L (Built After 8/94 Production Date)
  • 1995-1996 Toyota T100 Upstream O2 Oxygen Sensor with Install Tool V6 3.4L Automatic Transmission with
  • 1997-1998 Toyota T100 Upstream O2 Oxygen Sensor with Install Tool V6 3.4L
  • 1995-2000 Toyota Tacoma Downstream O2 Oxygen Sensor with Install Tool L4 2.7L
  • 1995-1998 Toyota Tacoma Downstream O2 Oxygen Sensor with Install Tool V6 3.4L
  • 1995-2000 Toyota Tacoma Upstream O2 Oxygen Sensor with Install Tool L4 2.7L
  • 1995-2000 Toyota Tacoma Downstream O2 Oxygen Sensor with Install Tool L4 2.4L Automatic Transmission with
  • 1995-2000 Toyota Tacoma Upstream O2 Oxygen Sensor with Install Tool L4 2.4L
  • 1999-2000 Toyota Tacoma Downstream O2 Oxygen Sensor with Install Tool V6 3.4L excluding California Emissions
  • 2000-2004 Toyota Tundra Downstream O2 Oxygen Sensor with Install Tool V6 3.4L
  • 2000 Toyota Tundra Upstream O2 Oxygen Sensor with Install Tool V6 3.4L (Built Before 8/00 Production Date) excluding California Emissions
  • 2000-2004 Toyota Tundra Downstream O2 Oxygen Sensor with Install Tool V8 4.7L
Part #: 1AEEK00511

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