"Genuine OEM" 3rd clutch pressure switch parts sourcing?
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Thread: "Genuine OEM" 3rd clutch pressure switch parts sourcing?

  1. #1
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    "Genuine OEM" 3rd clutch pressure switch parts sourcing?

    Hello,
    I am about to service a persistent OBD code P1739: 3rd clutch pressure switch.

    I do not have any issues with my transmission or shifting, so I assume the switch or the wiring has just out lived it usefulness.


    I found some useful info about accessing the switch here;

    Test /diagnose the 3rd pressure switch.

    I have found a lot of vendors selling what seem to be generic "Genuine OEM" parts for half the price of an item in a Honda package.

    GENUINE HONDA OIL PRESSURE SWITCH - ACCORD ODYSSEY PILOT, OEM NEW 28600-P7Z-003 | eBay

    What should I look for in a part? Where did Honda source its OEM parts for this item number? I have seen references to "Texas Instruments".

    https://www.hondapartsnow.com/genuin...0-p7z-003.html

    Any recommendations for a part that will work as intended?


    Thank you.

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  3. #2
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    I have no way to know if a part from e-bay is genuine or not. But I do know there is a ton of counterfeit stuff out there - everything from purses to aircraft parts.

    IMHO, it's not worth the hassle. The factory part lasted 12+ years. Replace it with OE and it will probably outlast the van.

    Dave
    2002 Odyssey EX Fern (Granite) Green
    Honda hood protector, stainless steel flex brake lines, Honda block heater, AC condenser screen, Zymol wax
    141,000 miles/227,000 kilometres; original transmission; Amsoil MV ATF since 79,000 miles/127,000 kilometres; Magnefine aux ATF filter; Honda aux ATF cooler; 18 drain and fills

  4. #3
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    Hello,
    Thank you for your comments.

    I just swapped out a Oxygen Sensor in my 2003 Element and saved $70.00 in parts cost by purchasing a "Denso" branded item which is popularly thought to be the actual OEM manufacturer for the official Honda part.

    I am wondering if these oil pressure switches are distributed the same way.

    Thank you.

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  6. #4
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    Funny you mention the Denso O2 sensors. Yes, I too made an exception to OE and bought them based on Denso being the OEM.

    It looks like TI is the OEM for these oil pressure switches. (Normal - Honda farms a lot of stuff out to suppliers.) Question is if TI sells outside of its contract with Honda. Try as I did, I found no answer.

    One thing is for sure: if the oil pressure switches on e-bay were OEM, they sure wouldn't come in a Honda box!

    Dave
    2002 Odyssey EX Fern (Granite) Green
    Honda hood protector, stainless steel flex brake lines, Honda block heater, AC condenser screen, Zymol wax
    141,000 miles/227,000 kilometres; original transmission; Amsoil MV ATF since 79,000 miles/127,000 kilometres; Magnefine aux ATF filter; Honda aux ATF cooler; 18 drain and fills

  7. #5
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    Thanks again for the comments.

    I went ahead and bought an OEM part from a Honda Dealer. After reading about how pressure switches work in these systems and how a slight deviation in spec (from either old age of the correct part, or a mis specified new part) can causes slight, barely noticeable, changes in the shift timing I decided I would like to have the best chance at having everything work as intended. After reading it seemed that as a correct part wears out there is a gradually increasing character of poorly timed shifts which increases the strain and wear on the internal mechanisms. I drive the van very calmly on flat terrain so it is likely I have not noticed the shifting timing devolve where as someone driving aggressively in hill country might see degradation occur rapidly.

    It seemed like it is a good idea to use a part that is most likely to be quality controlled for the specification desired.

    Thank you.

  8. #6
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    I couldn't have explained any better the downside of installing a deficient pressure switch.

    You made a good decision to go with OEM.

    Dave
    2002 Odyssey EX Fern (Granite) Green
    Honda hood protector, stainless steel flex brake lines, Honda block heater, AC condenser screen, Zymol wax
    141,000 miles/227,000 kilometres; original transmission; Amsoil MV ATF since 79,000 miles/127,000 kilometres; Magnefine aux ATF filter; Honda aux ATF cooler; 18 drain and fills

  9. #7
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    Just as a side note on the O2 portion of this discussion...I just replaced the front O2's on my 08 and the OE's were NTK, not Denso as I had always thought and read. As I've researched more though, it seems NTK/NGK is the OE, not Denso. The NTK site shows it as OE for the 2002 I just looked up. Just thought I'd note that just as FYI as they are relatively inexpensive with free shipping right from NTK.

    https://www.ngk.com/Automotive-Oxyge...-NGK-c904.aspx
    2008 Odyssey Touring-Silver
    2011 VW Jetta SE-Black
    2002 GMC Sierra SLT LB Z71-Red
    1998 Nissan 200SX SE-Blue

  10. #8
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    My attempt to source the correct part has taken a surprising turn:


    I ordered a genuine Honda part number 28600-P7Z-003 which is listed as the correct item for my 2000 Honda Odyssey 5 Door LX; KA 4AT form hondapartsnow but they sent me part number 28610-RKE-004 which is clearly listed on theirs and many other websites as not suitable for my Odyssey.

    My invoice states part number 28600-P7Z-003 so after a wait of several days hondapartsnow has issued a RMA but they insist that the part is a correct fit:

    'Part number 28610-RKE-004 that you received is a direct replacement for the part number 28600-P7Z-003, within Honda's catalog. They are interchangeable and will work on all of the same applications.
    Although the website may not reflect the updated information, all of our parts ship directly from dealerships. Dealers will update the part information prior to shipment.'

    I am surprised to learn that hondapartsnow is not an actual honda dealer but relies on a network of dealers to source both parts and expertise.

    I am also surprised to learn that after a search at actual Honda Dealer websites that I can find no other mention of the part I ordered having been superseded by a part that is currently listed as not applicable.


    Does anyone have any info about this part being superseded?

    Thank you.

  11. #9
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    College Hills Honda says that 28600-P7Z-013 replaces 28600-P7Z-003.

    https://www.collegehillshondaparts.c...003&make=honda

    They show no relationship between 28610-RKE-004 and either 28600-P7Z-013 or 28600-P7Z-003. Also, 28610-RKE-004 fits some Gen 3 Odysseys, but no 2000 models.

    https://www.collegehillshondaparts.c...0xMSZhPWhvbmRh

    As a final sanity check, call your local dealer with 28600-P7Z-003 and ask if this # has been superseded.

    If they confirm the #, order it from an online Honda dealer like College Hills or Bernardi.

    Dave
    Last edited by davedrivesody; 02-27-2017 at 09:55 PM.
    2002 Odyssey EX Fern (Granite) Green
    Honda hood protector, stainless steel flex brake lines, Honda block heater, AC condenser screen, Zymol wax
    141,000 miles/227,000 kilometres; original transmission; Amsoil MV ATF since 79,000 miles/127,000 kilometres; Magnefine aux ATF filter; Honda aux ATF cooler; 18 drain and fills

  12. #10
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    I called my local dealer and they said they had part number 28600-P7Z-013 in stock. When I asked if it would be labeled 28600-P7Z-013 the parts guy said "no it will say 28610-RKE-004".

    I went to the Honda USA estore and it still lists part number
    28600-P7Z-013, so I phoned Honda USA and they say it should be part number 28600-P7Z-013, but advised that I should call a dealer about the 28610-RKE-004.

    My concern is that I can not figure out where the local dealer or hondapartsnow is getting the information about the parts swap. I would like to learn why that part was not suitable for my Odyssey a few years ago and why is it suitable now.

    I did find an obscure SINS pdf file that suggests that
    28610-RKE-004 replaces a lot of old Handa parts including the part number 28600-P7Z-013 I am concerened with: http://www.sins.com.tw/Documents/28610-RKE-004%20Usage.pdf

    This just concerns me further because I can not find the data for the switch point PSI ratings to compare, and I get the impression that they were different and were specific, but now are regarded as a sort of generic close enough sort of specification.

    The irony is that I wanted an exact spec part and tried to buy one and now I feel like the $19 ebay special is likely as good a match as the 28610-RKE-004 for my purposes.

    I wonder if anyone has access to the latest Honda tech service bulletins and if there is an explanation for the
    28610-RKE-004 swap? Honda USA referred me to their techinfo.honda.com website if I want to attempt to learn any further details.



  13. #11
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    I have been able to correspond with a representative at S.I.N.S. in Taiwan who provided this information about the two part numbers:

    "The same specification, only different design inside. They are all normal opened type of switch.
    The set point: 33 psi
    Differential: 8 psi
    Fatigue life: 3 million times"

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