• Direct Fit
    • Correct Connector No cutting or splicing
    • Correct wire length (21 inches)
  • Downstream Sensor as listed per applications
  • Heated
  • 4 wire configuration
  • Replaces dealer part numbers: 36542PR7A51, 36542 PR7 A51
  • Built and tested to strict quality control standards

Note: For clarification purposes:

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

If you have a bad O2 sensor causing your vehicle to fail an emission test then this is the part for you.

Returns Note:

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.

Note:  You may be required to reset the vehicle’s computer after installation of this part.

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.

  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

5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
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1 Star
This O2 sensor works with my 2004 Honda Civic EX
This O2 sensor works with my Honda Civic 2004 EX. I have check engine light P0139 and P0404. Had hard time removing O2 sensor. Decided to bring my car to Velasquez muffler and brakes. They replaced the O2 nut for $45 fee. Drove for 75 miles then went for emission test. All tests PASSED. Thank you 1A Auto.
May 5, 2018
3 months ago
02 sensor
I can’t believe this O2 sensor give me perfect reading on my OBD scanner . Also the price is great differently I will recommend to my friends and people I know .
March 21, 2018
5 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 3 questions Browse 3 questions and 2 answers
Does this fit the ex sedan?
Hector V on Sep 22, 2017
BEST ANSWER: What is your year and model so we may confirm fitment?
Does this sensor also fit the DX sedan?
Hector V on Sep 16, 2017
BEST ANSWER: No this does not fit the DX sedan.
Will this replace the downstream sensor for a 2005 civic value package?
Mike F on Apr 13, 2018

Vehicle Fit

  • 2001-2003 Acura CL Downstream O2 Oxygen Sensor
  • 2000-2005 Acura NSX Rear Bank Downstream O2 Oxygen Sensor
  • 1999 Acura TL California Emissions Downstream O2 Oxygen Sensor
  • 2000-2003 Acura TL Downstream O2 Oxygen Sensor
  • 1998-1999 Honda Accord V6 3.0L California Emissions Downstream O2 Oxygen Sensor
  • 1998-2002 Honda Accord L4 2.3L Downstream O2 Oxygen Sensor
  • 2000-2002 Honda Accord V6 3.0L Downstream O2 Oxygen Sensor
  • 2003 Honda Accord (excluding EX Models) L4 2.3L Downstream O2 Oxygen Sensor
  • 2001-2005 Honda Civic EX L4 1.7L Downstream O2 Oxygen Sensor
  • 2002-2004 Honda Odyssey Downstream O2 Oxygen Sensor
  • 1997-2001 Honda Prelude Type SH Upstream O2 Oxygen Sensor

This part replaces:

  • OE # 36542PR7A51
  • Standard Motor Products SG1861
Part #: 1AEOS00048

Order must be placed by 4pm ET

How-to Video:

(03:08 min)