Need source for an upstream (bank 1?) O2 sensor for a 04 Dodge Caravan (3.8L)

Need source for an upstream (bank 1?) O2 sensor for a 04 Dodge Caravan (3.8L)
The problem seems to be that this year and only this year model needs a
heater resistor with a cold range of 2.1 to 2.7 ohms. The O2 sensors I've found have a cold resistance of ~ 6 ohms.
If there are none available are there is there a work around?
TIA
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On 7/17/2012 2:56 PM, NotMe wrote:

A Bosch 15512 should work OK in that application. Don't forget to clear the DTCs after installing.
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Thanks I'll look into it.
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Did a bit more digging and found out that, without exception, I've been given the down stream oxygen sensor in place of the up stream part I needed in the first place. (No direct knowledge but seems the parts list/cross reference data base may be bollixed.)
Second (still working on this) there is some confusion on the correct up stream P/N for my specific 04 Van. Right now the question comes which will work on my particular van. the Bosch 15512 or the Bosch 13709.
Chrysler/Dodge has been of little help. Seems the micro give a Schmitt department is ==> that way. Likely would be better if I could get past the bottom level of their support group.
OTOH Bosch Technical support has been helpful as has OReilly Auto parts online customer service group. Kudos to both!
When I get this sorted and the fix done I'll post the result.
An aside. I spoke with the Texas inspection department in Austin and should the correct part be no longer available I can get a pass on that part of the inspection. Bit of a chore what with all the forms and hoops I must jump but I will be able to get the inspection legally.
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On 7/18/2012 2:31 PM, NotMe wrote:

I show 15511 is the downstream, 15512 is upstream. Both should have the correct connectors for your application.
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Connections are correct. The problem comes in the heater resistors in the upstream are 2.1 to 2.7 ohm in the early 04 (3.8L) van and ~ 6 ohm is the late 04 van.
That and the vendors were handing me the down stream sensor instead of the upstream apparently due to problems in the data base.
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