12572706 - Workhorse Oxygen Sensor

12572706 - Workhorse Oxygen Sensor


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Part# 12572706

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  • 2001 - 2010 Workhorse 8.1L Engines
  • All Workhorse Chassis with a 8.1L Engine

*(On pre-2003 models you may be required to modify the electrical plug by trimming a small piece for proper fitment)

Brand new Workhorse part for 8.1L engine. A bad oxygen sensor can be detected by either a check engine light or by a sudden loss of fuel mileage and/or power.

Is this the correct O2 sensor for my VIN? or am I needing the 12565414?

( Gerald Aubin, 05/09/2022 )
Can you double check the VIN ? It's not showing up as a valid VIN, but using the last 8 digits pulls up  5B4MP67G723345682 , showing a 7 instead of a 5 after the "G" .  ( Support )
Can you tell me what o2 sensors my 2004 Damon Intruder takes please, both of them? Also, what is the part number for the mass air flow sensor as well? Thank you, Eric ( Eric, 04/23/2022 )
Hello Eric, the oxygen sensors for that VIN are : 

12572706 - Workhorse Oxygen Sensor

and the MAF sensor is :  

W8000513 - Mass Air Flow Sensor( OEM), or MAF10043 - Mass Air Flow Sensor (aftermarket) 

( Support )
My check engine light came on and I'm losing power on hills. I got codes P0131 and P0151 indicating O2 sensors. Which sensor do I need? Is both going out at the same time common? Might it be something else?

( Bart Perman, 08/21/2021 )
I would recommend replacing both oxygen sensors as well as the mass air flow sensor: https://www.ultrarvproducts.com/AF10043-Mass-Air-Flow-Sensor ( Support )
Is this the correct O2 sensor for my VIN? or am I needing the 12565414? There should be 2 correct? ( CHARLES V LEBLANC, 07/23/2021 )
Hello Charles, your VIN calls for the  12565414 and there are two used , one on each bank of exhaust. ( Support )
Who is the manufacturer of this part ( Wayne Olsen, 06/17/2021 )
These are AC Delco sensors. ( Support )
I’m trying to see if this is the correct oxygen sensor and quantity required for my 2002 Holiday Rambler Vacationer? ( Cheri Vincent, 08/13/2020 )
According to your VIN you would use 12565414 and there are two used ,  12572706 has a different connector  ( Support )
I am trying to find an Oxygen Sensor for my 2008 Itasca Suncruiser 38T VIN 5B4MPA7GX83431516.
Service center is asking is it a 4600.
It has the Workhorse 8.1Liter with a w24 chassis. Will your part number 12572706 work?
( David Wingfield, 03/11/2019 )
Yes this is the correct oxygen sensor for your VIN. ( Support )
I would like to verify fit for my 2004 Winnebago/Workhouse chassis. Also, I can receive shipping only through UPS. Can you verify that the shipping method would be UPS? Thank you. J.C. ( J.C. Bristow, 02/03/2018 )
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 The state of California requires that this warning be posted for people purchasing products that reside in California.

WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov

VIN Verification Service Item

This product allows for a VIN verification service.

  • This is a service that we provide free of charge when a part is purchased.
  • When you provide your VIN below we will personally verify your part selection by your VIN before shipment of your order.
  • This helps ensure that this is the correct part for your vehicle.
  • This is not an automatic VIN check, it is done by a parts specialist once order is placed.
  • We can only VIN verify vehicles back to model year 1996, if older we can help but can't guarantee fitment.
  • If you would like to have your part selection verified before purchase please call or email us.

Shipping Insurance Notice

NOTICE: For orders outside of United States

If you are placing an order to ship outside the United States, Shipping Insurance will be required and added automatically at checkout.


  • Views: 74373
  • Brand: Workhorse
  • Product Code: 12572706
  • Availability: 4
  • $140.87
  • $111.32

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