12572706 - Workhorse Oxygen Sensor (Pre Cat)

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Part# 12572706

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Applications:

2001 - 2010 Workhorse 8.1L Engines
All Workhorse Chassis with a 8.1L Engine
2011-2012 Workhorse W62 w/ 6.0L

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

A bad oxygen sensor can be detected by either a check engine light or by a sudden loss of fuel mileage and/or power.

Would these o2 sensor work on my truck and are there any other alternative part number that would also work ? ( Nelson Velez, 03/15/2024 )

You will want to confirm with a GM dealer but according to the information we have available to us, the part # for the RH sensor is 12565414 and the LH sensor is 12565415. ( Support )

Need 2 upstream oxygen sensors ( Ron mcrae, 01/17/2024 )

12572706 - Workhorse Oxygen Sensor (Pre Cat)

That is the correct part # for those .

( Support )

I have a 2001 W20 chassis with a 8.1 vortex. The O2 sensor plug appears correct except that a tab and slot inside the plug don't align. Your site indicates that a trim is necessary. Do I open the slot on the O2 sensor plug, or trim the tab inside the wire harness plug? Thanks in advance. ( Ricky Hunkins, 10/01/2023 )

We find it is easier to trim the sensor plug than the vehicle side plug. ( Support )

I have Banks Power Pack Stinger System GM 8.1L on a Workhorse Chassis Motorhome. Is this the correct oxygen sensor for me? ( STEVE HAROLD MAYER, 10/31/2022 )

Yes, the oxygen sensor does not change with the addition of the Banks system. ( Support )

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

Thanks ( 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?

Thanks! ( 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 )

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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.

VIN part verificaion 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.