????
No, I think its more of a $$$ decision. If engineers could have their way, then Ford wouldn't have so many recalls.
My truck is an 01, and has wideband. I think Toyota went narrowband on the IS 300 because the 2jz-ge already had OBDII ECUs up and running.
Why spend a ton more money changing those existing and working components to accommodate to wideband?
It was money, IMO. (read hear, In My Opinion, take it with a grain of salt).
Funny what you say about the Scion, o2sims.com say they do not support the tC because its all wideband.
And looks like there is a void in the market to sim wideband if anyone is using them post cat.