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I found out that my valve stem is leaking down around the area where it goes into the Tire.

What is the correct fix? I know I can buy a whole new TMPS, but is there an option for just replacing the stem? I looked at Rockauto and saw a number of different types of STEMS. Some look like a press in, while others are screw in.

What is the factory setup? Is there a nut in there that I can just tighten up to stop the leak?

If its just a stem replace, can a Wal-mart or local garage do this, or do I have to go the the dealer? I just recently got new tires, so I'd rather not have to pay for the mounting and balancing again if I can avoid that.
 

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Discount tire does free flat repairs. That includes balancing and an internal tpms rebuild. I'd give them a shot first, unless it's the actual stem leaking.

Check and make sure the Schrader valve is snug too.

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I'm 99% sure that the factory valve stems are not serviceable, but you could always call the dealer to confirm.

Aftermarket stems come in rubber or metal and a majority are serviceable. I know Dorman is; they showed a rebuild kit when I bought replacement sensors, but they aren't interchangeable with OEM.

If you're certain they are the factory sensors, you'll probably have to replace the whole shot.

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If you recently bought tires, id take it back to the tire shop and tell them your tire keeps going flat. They may have tweaked something when mounting your new tires.
 

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Some time ago I had a really slow leak in one tire. finally found the bad guy in the tread causing it. Went to Americas Tire/Discount tires . They fixed the leak, replaced the black rubber valve stem assy (done every time a flat is fixed or tire replaced at their store) TPMS version or not, then re-balanced that tire for zero $s. Based on what I believe I saw in the packaging, the only original part still in the wheel was the sensor. At some tire or garage locations, it wouldn't surprise me that *they* would ignore that all important function, whether it be a flat or tire replace.
 

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Since, you are sure it is the valve stem, then it can be replaced separately. However, you will need a valve stem specifically made for TPMS sensors. There will be a small protrusion extending from the base of the stem where the screw for the sensor attaches to the valve stem. Most auto part places should have them in stock.
 

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I'm 99% sure that the factory valve stems are not serviceable, but you could always call the dealer to confirm.

Aftermarket stems come in rubber or metal and a majority are serviceable. I know Dorman is; they showed a rebuild kit when I bought replacement sensors, but they aren't interchangeable with OEM.

If you're certain they are the factory sensors, you'll probably have to replace the whole shot.

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The stem is serviceable. There is a screw (T10, I believe) that holds the sensor to the stem. Remove it and the sensor, cut the bottom of the stem off with a razor blade and pull it through.

I can get a part # at work today if you like?
 

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As stated, the valve is "serviceable", but for the price of a new one, replacement is much simpler so I figured why bother.
 
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