Another noob question. I read user manual, no word found on it.
Does 200t have 1 or 2 air filters? I already had OEM one out, for inspection, the big guy, and have high air flow on order, as replacement. But, at a glance, in air ducting, there's a piece that looks like a housing for cylindrical filter and, just at a glance, it appears to be part of turbo air supply. Sort of off engine center to the right, facing it, in front of the plastic engine cover. Like a bulge in air duct with clamps on each end.

 

Took a good look at that "canister" I asked about. I don't believe it's a filter housing. Didn't really wanted to mess with several screws to take it apart and see what's inside. Eventually.

 

I've found my Lexus dealer's PARTS DEPARTMENT has been a good source for following schematics and answering my questions about what is where under the hood/bonnet of my NX and RX.

 

If you are speaking about this Canister shaped piece (circled), It is a silencer for the turbo. I can not tell you much about it since it is not a serviceable part. What I can tell you is that, it is not serviceable so there is no filter inside it, no charcoal... nothing like that. More than likely it is something like a muffler in design. It lessens the whistle and BOV sounds made by the turbo under heavy acceleration.