There are two different sizes of rims: R16 and R17 (standard on XLE limited). 2004-5 and 2009 are the same generation. The main difference is the engine 3.3L(04-06) vs 3.5L (07-).

 

Thanks for the reply thanwu. I am aware that there are two different size of tires. The used rims and tire I bought are 17 inch but I was told that the stock TPMS sensors listed for the 2009 will not fit on the older alloy rims by my mechanic. He had the tire off today and he showed me how the sensor was just floating off the rim as opposed to (I suppose) hugging the side of the rim instead. he said that if he installed the sensor, it would probably break off at the stem due to the lack of side support. This is what I am trying to figure out.

 

Well, you started out with flattery, so now I guess we have to help you!

Interesting problem, and I doubt that we've run across this before. It may take a little research to get you a final answer.

What I know: The 42607-0C050 is the right sensor, made by TRW to support the system that the Sienna uses. For some reason, Toyota has two TPMS suppliers, and most models use the Pacific brand system.

According to one chart I previously downloaded when I was going thru this, the 42607-0C050 is a 20' valve stem to body angle unit, made to fit all OEM wheels for 2006-2010 models. I see reference to a 42607-08010 also, that may be a later replacement, but also seems to be 20'. Also a 42607-0C030 which also seems to be the same thing.

Some Sequoia models used a TRW 42607-0C060 that one source says is a 40' angle sensor.

Another source says that alloy wheels "typically" use the shallow bend 20' sensors due to their internal construction, and that the steel wheels use the higher bend 40 degree sensors. However, I *think* that the Sienna steel wheels use the same 20' sensors as alloys! Net here is that the information available seems to be a bit unreliable.

The wheels you purchased do look like the factory gen-II wheels, but in those earlier days the Sienna didn't use sensors. So the question is what was the internal construction of the wheel early on. 2004-2005 and 2006-2010 are both considered "Gen-II" Sienna models, but there were a few changes that were introduced over a 2 year period (2006 & 2007) that differentiate them. 2006 had the revised front, but still used the wheels you show. 2007 has the larger engine, new wheels, and list TPMS (we know the earlier models had a non-direct sensor system), so it looks like new wheels may have been introduced to go with the new direct sensor system.

I need to see if there is any data out there on internal construction, and if the 40' sensors will talk to the Sienna system.

 

Fibber2, I guess my wife was right (OUCH THAT HURT!!), flattery will get you everywhere!! LOL. If you find anything else out, please let me know. I suspect that the wheels must of have changed over the years. I was looking at my summer rims (which are the original rims) and from the outside they are a very different different design but that may not mean much since it is the inside that matters.

 

2004-2006 sienna tpms systems didn't use sensors in the wheels. The tpms was a simple speed differential calculation between the wheels. As of 2007, the sensor type of tpms was mandated by the US federal govt and the wheels probably changed to fit the system.

 

I poked around a few other places but there doesn't seem to be any usable data about the internal shape of the alloy wheels. I think we are going to have to just accept that wheel construction changed with the 2007 models and the introduction of direct reading sensors.

So what now? I understand your mechanic's concerns. One would think that having the transmitter body resting against the inside of the rim is the best method. However, you might want to go to a tire shop that sells Schrader EZ-sensors and see if that is absolutely required. Schrader (and Orange) sell a universal programmable 315 mhz sensor that can be cloned to the same ESN as your existing sensor, and that can make seasonal changes quite easy. I have four Toyota 42607-0C050 sensors installed in my Tirerack aftermarket winter rims, but that required that I also purchase an ATEQ electronic gizmo to facilitate seasonal reprogramming. With the Schrader system, they duplicate your existing codes, so when you swap tires all appears normal to your TPMS ECU. If I had to do it all again, I too might take this route. Are your Toyota sensors returnable? If not, sell them on ebay (seriously - that's where I bought mine!).

But the real reason I'm telling you all this that it appears that Schrader's single part number 33000 sensor is a 20' unit, and they list it as compatible with all Toyota applications, steel & alloy, 20' or 40', universally replacing a dozen different Toyota part numbers! There are some swivel units out there also, but this is a fixed angle. If this is true, then they are saying it's OK to have the body NOT resting against the inside of the rim. A good tire shop that is knowledgeable in this might be your best bet.

You must report back your findings so that you help grow the body of knowledge!

 

Thanks again Fibber. I actually bought the sensors on Ebay (cost me less than $100 for the four) so I'm not out of pocket a huge amount. I may just forgo the sensor install (at least for now) but may try to revisit the issue and perhaps try to have them installed them sometime in the future when I have to replace the winter tires and when I'm at a tire place with perhaps more experience on the matter. For now I'll just have to live with the little yellow light Thanks again!

 

I agree to what tcp said, I recently changed my OEM flower style wheels on a 05 xleltd and went aftermarket and I was surprised not find a TMPS sensor inside so it was a super easy swap.........

Javvy