I wondering would 2005 oem rim (235 45 17) fit for 2003 TL-s

 

if its not droped maybe .. if its droped.. anything less than +45 offset and larger than 225 will rub..

 

how about 2005 TL oem 18" rim, would that fit my 2003 TL-s (no drop)

 

Welcome to Acurazine. You'll be ok for the mostpart, that is if you don't drop your ride. The wheel/tire will be even with the outer fender lip and personally will not look that great. And caution when carrying a load of passengers. One big dip and you will rub.
You can also do a search as this topic has been discussed numerous times.