Please check notes in each part listing to ensure the PCV Valve / Crankcase Ventilation Hose is correct for your 2004 MAZDA 6 with a 2.3L engine. DORMAN & GATES are competing brands, and each brand's PCV Valve / Crankcase Ventilation Hose may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a PCV Valve / Crankcase Ventilation Hose fits only certain 2004 MAZDA 6 models.
Clicking a "More Info" link will display a picture and/or other details about that PCV Valve / Crankcase Ventilation Hose in a separate window (you may need to turn off your pop-up-blocking software for this to work).
After choosing a PCV Valve / Crankcase Ventilation Hose, click the "Add Part" button. Shipping costs will be shown on the Shopping Cart page. You may use your browser's Back button or click "Find More Parts" to find more Emission parts, other MAZDA 6 parts or parts for a different vehicle. Please try our Interactive Catalog (click link above) for faster searching. Both catalogs use the same shopping cart so any auto parts you've already chosen for your 2004 MAZDA will not be lost if you switch.