Valve Stem Core Replacement?

It appears to be all in one...here's a diagram:

 

Hard to say but I also wonder how much these valve stems/TPMS senders cost. Also, it brings up the issue as to how long the battery life in the sender will last and if the battery itself can be replaced. My diagram doesn't show any way to do that...sorry.

 

Let Toyota warranty it.

 

I had a Camry that came like that. For whatever reason the one pin had more friction than the rest and did not always reseat well after being depressed.

 

Yes. Certain parts can be replaced. Discount Tire usually rebuild them when you buy tires.
The kit is like $5.
TPMS Rebuild Kits

 

They are very easy to change. Your local auto parts store should have replacements as well as the tool to remove and replace them.

 

In addition to the cost of the TPS, there is an additional charge to have your car programed to recognize the new TPS. If you're still under warranty, it might be best to give this problem to Toyota.

 

So it looks like most of the TPMS sender can be salvaged? I checked your link for the rebuild kit but could not see the battery (unless it's that tiny cylinder inside the stem). Good to know though for older G3s going out of warranty.

 

The battery is not replaceable, however, I haven't seen one die yet. Usually a flat tire takes them out.

 

Batteries are NOT designed to be replaced. They are encased in pot metal. That said, I have seen someone on the Corvette forum hacking it to replace the battery and reseal the case with silicone. It is a dirty job and the guy said 1/5 TPMS gets ruined in the process.

 

I was afraid of that...I wonder what the expected life of a TPMS sender battery is and how much each is to replace? There's also a recoding process as each one has a unique transmission ID - add that to the cost.

 

Prii got them in 2006, I see many of those going strong. The replacement cost depends on where you go. I know I replace them for much less then the dealers around me are charging, maybe even half.

 

Bingo. But if the valve stem is aluminum be sure to use a valve stem core that is made to work in an aluminum stem or there will be corrosion.

 

Yea the problem is you have to reprogram the ECU with the new IDs with TechStream. That's might be a dealer deal, unless you use aftermarket TPMS that can clone the original IDs.

 

I know someone with a 10 year old GM product that is still on the original TPMS batteries. That's on the long side for battery life but 6 or 7 years seems to be pretty common.

 

The little part with the pin and spring can be unscrewed with one of the valve caps that has the slot in it. Just buy a set of valve stems ($5?) and a set of the caps. Let all of the air out of the tire by pressing the pin, unscrew the old stem using the new cap, screw in a new stem, and reinflate the tire. The TPMS unit should be fine.