NCSCOTT said:Yours is a 1 off and or a production line mistake. My 04 came with 17" wheels and has 12.6" rotors. Have you done the brakes yet? 12.6" and 13.3" use different brake pads. You can call the dealership parts Dept with your Vin and they can tell you what size rotors are on it.
I would also think the rotors would "look" bigger behind the 16" wheel since the wheel is 1" smaller. It would give the allusion of a larger rotor. As far as the measurement goes it would be hard to accurately measure the rotors while still attached to the vehicle.
The norm is as I list in the previous post.
Here's something I found. This is per top4runners.com.
The Toyota spec sheet for 03-04 lists 12.6" rotors for 16/17" wheels and 13.3" for Sport Editions. However, for 05+, it just lists it as 12.6" for 16" wheels and 13.3" for 17" wheels. No SE specific size is listed.
Here are the pdf files.
http://www.top4runners.com/ja/runhist/4thgen/2004specs.pdf
http://www.top4runners.com/ja/runhist/4thgen/2005specs.pdf