How to determine base, pre-runner, x-runner

Very confusing until I know the difference. When looking up replacement parts, they always ask which sub-make/model it is. Owners manual is no help with this often asked question. 2009 Tacoma TRD 4x4 V6 SR5 is what it says on tailgate.

 

Welcome to tacomaworld.
Lots of times google search engine works better than the tw search bar at top right of your screen.

I googled
tacomaworld.com sr5 4x4 offroad prerunner
And found this. Hope it helps.. if not try the Google search method.
https://www.google.com/url?sa=t&sou...CgCMAA&usg=AFQjCNEYj29Xi4qCxRI9rEbi_zBWSaELsw

 

I always click the base option to get proper reference for parts

 

For looking up parts, the three options I usually come across are base, prerunner, or pro. I always select base for my trd sport.

 

Base is what yours is