Help deciphering a couple things on my 2007 Prius

I believe you have a touring model. The fog lights, high intensity headlights, and 16” (initially) wheels make it clear. You can look at all the specs of a 2007 touring model here: Used 2007 Toyota Prius Touring Specs & Features | Edmunds

 

We got 16 in wheels on American Priuses before 2010 No kidding .? Well that would be the first thing that would have to go if the car was mine and obviously one of the past two owners was of the same type of thinking that was a terrible tire size for most people most people try to skip it and go right to 17 or stay at 15 if they're smart. I had no idea that in seven or before 10:00 they offered 16-in wheels and never even seen or heard of this before That's interesting makes sense it would be only on the tourer though. And they could quickly get passed off to unsuspecting non-car people. My VW Passat came with 16s they were immediately swapped out for the regular 15s when I owned it very quickly because tires were plentiful in that size range of all kinds of tires in the 16s you could get very little at the time and then they just kind of got skipped over for 17s and no one ever looked back.

 

Actually, that brings up something: if the car’s internals think it has 16” wheels when it currently has 15” wheels, then the speedometer, odometer, and fuel consumption rating are going to be off.

 

If you adhere to the factory specs for tire size, negligible difference
15" 185/65-15
16" 195/55-16
17" 205/45-17

Input specs here.

https://www.tacomaworld.com/tirecalc?tires=185-65r15-195-55r16

 

Look at the rear spoiler. The touring model spoiler extends out further from the hatch,

 

That's interesting I have a tour here I'll have to go look at the spoiler because my gold 09 is not a tour. But that's correct no matter what your wheel size is it's the total outer diameter of what's touching the road so 185 65 15 and a 215 45 17 almost same total OD . So your speedometer stays accurate because it's looking at the total OD. But let me say this if like me on my other cars you try to run two different tire profiles like a 185 60 15 in the front and a 185 65 in the rear your traction control light will constantly be engaging your slip light will constantly be flashing on and off and your electric motors will be acting as if your car is in the snow or slipping on rain which is not good I noticed this just a few weeks ago I pull the wrong tires out of my shop mounted them wasn't even paying attention and realized I had 185 60s on the front 65s in the back and this went on for 3-4 days put the right 65s on the front to match the back instant problem gone back to 90 mph couldn't hardly make over 62 with the traction control lights and slip lights or VSC lights coming on and off it was very annoying.

 

2007 Prius Touring Pics note spoiler pics at page bottom.

https://www.topspeed.com/cars/toyota/2007-toyota-prius-touring-edition-ar12545/pictures.html#94536

Register your Prius VIN at Toyota.com, may have your complete history

Toyota Owners Registration