If you're looking for something specific related to air, please clarify:
* Are you looking for the air conditioning compressor? This is a large component under the hood connected to the serpentine belt.
* Are you looking for the air filter? This is usually located in a housing near the engine, also under the hood.
* Are you having trouble with tire inflation? You would need a portable air compressor (not part of the car itself).
* Is there something else you are looking for related to "air"? Please provide more details.