It should be a simple swap. no reprogramming is needed. if your tpms light turns on, might simply need a reset. go to your manual, which shows how to do that. No reason to rebalance.

 

The tire sensors from the 19" need to be program to your van. Any tire shop can do it for small fees.

 

Just take it to your local Discount Tires shop. Pay them for the reset, buy new tires there when those POS 19's wear out and you'll have free rotation and balancing for life.

 

I am assuming you are getting a full set of SE wheels with tires and TPMS already mounted. If that's the case, straight swap. you can do it yourself with a jack.

 

Unless something has changed with the newer models, Toyota's TPMS will not wipe out and relearn the new ECID when you swap wheels. If you plan to change tires often (winter / summer), consider investing in a module that will allow you to read & write the TPMS sensor sets thru the OBD-II port. I have the ATEQ tool for that, and it works great. Otherwise, take it to a shop and have them do it.

Gotcha's: The shop will need to have invested in two tools - the reprogrammer that hooks to the OBD port, and the RF reader that will determine the code of each sensor from outside of the tire. If they don't have both, you can download the codes from the 'donor van' and move them, breakdown the new tire set and physically read the string, or keep calling around until you find someone with the right hardware to do the job.

 

if you use your existing TMPS no programing needed. if you swap, you'll need to get it programmed.

 

Thanks everyone for all the responses. I'm probably just going to keep the 19s and sell the 18s. There's only a 12mm difference in the width of the sidewall between the 18s and 19s; will that make that much of a difference in the snow? Fibber2, which ATEQ tool do you have? Thanks.

 

I have the ATEQ Quickset, purchased at Revolution Supply. Last year Amazon added it:

If you click on the 5 star ratings, you can read my review (Old Bike Guy) of it.

In snow, narrow is better. Traction is largely about force per square inch, so minimizing the contact area footprint can help. When possible, I've gone with a size smaller tire. For instance, on one of my vehicles (normal = 225/60-16), I went with 215/65-16.

 

I have the ATEQ Quickset, purchased at Revolution Supply. Last year Amazon added it: http://www.amazon.com/ATEQ-QuickSet-TPMS-Reset-Tool/dp/B008SCWXN4/ref=cm_cr-mr-title

If you click on the 5 star ratings, you can read my review (Old Bike Guy) of it.

In snow, narrow is better. Traction is largely about force per square inch, so minimizing the contact area footprint can help. When possible, I've gone with a size smaller tire. For instance, on one of my vehicles (normal = 225/60-16), I went with 215/65-16.

Thanks Fibber2. Didn't know that about traction in snow; for some reason, I thought that you needed a wider tire for more traction, but maybe I'm confusing that with handling.:dunno: I'm guessing there won't be much of a difference in handling or traction going to the 19s since they're the same width as the 18s.

 

Whats the bore size for the sienna's - 60.1? And they are 5x114.3 right?

 

yup!