Change Carbone and Air filter.

Easy. Read the instructions in your owner's manual. If you haven't, read it cover to cover... lots of good information in there.

 

If you are referring to the cabin air filter this is a video on how to do it. Hopefully this works for your model.. [ame=http://www.youtube.com/watch?v=JqqYu7sg-e4]YouTube - Toyota Prius Cabin Air Filter[/ame]

 

if you're referring to the fibula, car surgeon's are not cheap.

 

Take the cabin filter to the sink and wash it with soap and water and reinstall it.
Replace the engine filter with the same throw away type or buy a reusable K&N air filter.

 

This is a Toyota dealer that sells Toyota parts by mail. I got 2 engine air filters and 2 cabin air filters for $60 plus $10 shipping. As you see the cabin filter is easy to change and saves you $70 dealer charge. http://www.metrotpn.com/ProductDetails.aspx?ProductID=133&SearchText=cabin+air+filter

 

And the engine air filter is even easier than the cabin filter.

Oh, and it's a carbon filter, not a carbone one.

 

I guess the filter must be square, he put the new one in turned 90 degrees to where the old one was orientated.

 

Wow, you really pay attention to detail!

 

how ofter do you replace the 'motor' air filter?

 

i think check at 15 and replace at 30? it's in the manual.