The PCV (positive crankcase ventilation) valve in a 1st generation (2001, 2002, 2003, 2004, 2005 & 2006) Acura MDX with the VTEC 3.5L V6 engine should be checked and cleaned about once a year and replaced every few years. Check out my DIY tutorial for the procedure (with the compatible replacement part numbers) by clicking on the text link or thumbnail image below.
2001-2006 Acura MDX PCV Valve Replacement Guide
