When i'm driving, I turn the AC on with the air recirc. I start to smell exhaust fumes in the cabin. I turn off the AC and open the recirc so i'm bringing in outside air. The smell starts to go away. I turn the AC back on with the recirc and the smell starts to come back. Could it be the downpipe leaking into the cabin? I've got 13k do I need to change my cabin air filter?

Thanks in advance!

 

do you have an aftermarket DP?

if so, it could be leaking...

if the recirc light is on, that means air is NOT coming in from the outside, FYI.

make sure that your cabin air filter is properly installed, I dunno.