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Vehicle Fit


  • 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.

Install note:

You may be required to reset the vehicle computer after installation of this part.

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.

Item Condition: New

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

4.80/ 5.0
5 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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
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
Perfect Fit and Cleared the issue
Installation was almost as easy as in the video - the only difference was mine was stuck in there and it took a lot more effort (until I used penetrating oil). Check Engine light is out and the van runs great!
August 15, 2018
Exact fit! Easy ordering
The part fit exactly as needed and the ordering was easy!
November 23, 2018
Good parts never disappointed
I order from 1 a auto all the time I go there first before I go anywhere else Parts always Fits right no problems here an will continue to shop and recomed to friends...
December 2, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
Does this sensor also fit the DX sedan?
Hector V September 16, 2017
No this does not fit the DX sedan.
Tim K September 18, 2017
Does this fit the ex sedan?
Hector V September 22, 2017
What is your year and model so we may confirm fitment?
Alex P September 22, 2017
Will this replace the downstream sensor for a 2005 civic value package?
Mike F April 13, 2018
Year Make Model Description
2001-2003Acura CL Acura CL Downstream O2 Oxygen Sensor
2000-2005Acura NSX Acura NSX Rear Bank Downstream O2 Oxygen Sensor
1999Acura TL Acura TL California Emissions Downstream O2 Oxygen Sensor
2000-2003Acura TL Acura TL Downstream O2 Oxygen Sensor
1998-1999Honda Accord Honda Accord V6 3.0L California Emissions Downstream O2 Oxygen Sensor
1998-2002Honda Accord Honda Accord L4 2.3L Downstream O2 Oxygen Sensor
2000-2002Honda Accord Honda Accord V6 3.0L Downstream O2 Oxygen Sensor
2003Honda Accord Honda Accord (excluding EX Models) L4 2.3L Downstream O2 Oxygen Sensor
2001-2005Honda Civic Honda Civic EX L4 1.7L Downstream O2 Oxygen Sensor
2002-2004Honda Odyssey Honda Odyssey Downstream O2 Oxygen Sensor
1997-2001Honda Prelude Honda Prelude Type SH Upstream O2 Oxygen Sensor
Part #: 1AEOS00048

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(03:08 min)