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Discussion Starter · #1 ·
Does anyone know exactly how the OEM valve stem and TPMS go together on the 2018's? I need to replace whatever the tire shop did after messing up the original valve stem. I do not know what they did with the TPMS sensor inside after putting in a generic stem. I initially ordered #7 and it got me the stem, o-ring (already installed), and nut. Then I got to thinking about missing an outer nut or rubber TPMS mount; so I ordered #5 (rubber, mounting) and #4 (nut, TPMS). The #5 rubber has a nice pocket for a nut exactly like #4 and the nut that came with the stem. The items I have and the picture do not really jive and I would like to know exactly how they go together before I go for a new tire and take the rim without a tire to redo the OEM valve stem. The other confusing part is putting the two nuts, one in the pocket of the rubber mount, and the nut on the end practically takes up the entire threaded mount of the stem, leaving little to no room for the rim and TPMS sensor. I also wish I had a good shop to go to for tires so the one that fubar'ed the stem will never get a chance to do worse......

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Discussion Starter · #4 ·
OK, so the TPMS Nut I got was not the correct nut. I think I am now stuck......

This is clearly not the nut I got for part # 39401-MKC-A01
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Discussion Starter · #12 ·
The bike shop I have been going to does work on many brands of bikes and they "pride themselves" with how many tires they sell, but I have never been pleased with them since the shop that really did tires well closed for retirement. I have no idea what they did to the original and I did not think to ask to see the parts. However, Honda Dealerships I have gone to for tires have had the attitude of "we will get the tire on the rim sometime this week" and they finally get to it when I complain minutes before closing time that I am still waiting for my tire.

But to be prepared to put OEM back, I will need to take the pictures and "wrong" part part number to a "good" dealer (not one near me) in hopes of figuring out the real number.
 

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Discussion Starter · #14 ·
Here's a link to the parts fiche for your rear wheel. If the shop kept your tpms sensor, they now have a $150 part from your bike. The part you show with the rubber is 39402-MKC-A01. The 39401-MKC-A01 is the part that holds the tpms sensor in place. Where the extra nut came from is anyone's guess.
They may take pride in the number of tires they sell, but their installation is questionable.
The entire reason this thread exists is because part# 39401-MKC-A01 is the wrong number for the part I need.
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What I need is not the nut that came in the package with that part number.
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Oh, by the way, 2018-2022 front and rear wheels all have the same wrong part number on the fiche.
 
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