What
@bloc said... To clarify for a more general understanding as I see it so far:
If your 200 Series came with the PA66-GF30 T's installed (pre-2013?), then I would go ahead and replace them with the PA6T-GF35 T's which superceded them and stop worrying about it (apparently no recorded incidents of these newer T's failing).
The only hitch is that if you order the T's alone from Toyota, you will receive the PA66-GF30 old style T's. Apparently, the only way to obtain the newer PA6T-GF35 T's is to order the two hose assemblies from Toyota which include the upgraded T's.
For others, if your 200 Series came with the PA6T-GF35 T's installed (2013 and later?), stop worrying - no action required.
HTH