Standard Ignition V421 PCV Valve

PCV Valve for Ford, Lincoln, Mazda and Mercury

Standard Ignition V421 is a screw-on PCV valve built for crankcase ventilation service on a wide range of Ford, Lincoln, Mazda, and Mercury applications. It is designed for direct replacement use on vehicles such as the Ford Escape, Fusion, Taurus, Explorer, Ranger, and Lincoln MKZ.

• Screw-on attachment method for straightforward replacement
• Female connector with 1 square connector and 2 male blade terminals
• Straight nipple orientation with 1 hose connector
• 5/8 in. hose size, 16 mm hose size
• Valve contents only
• Fits heated-valve and harness-specific applications where listed

Application Coverage

Compatible with 2002-2012 Ford, Lincoln, Mazda, and Mercury vehicles across the listed applications. Fits 2011-2012 Ford Escape, N/A, Heated; Fits 2010-2012 Ford Fusion, N/A; Fits 2012 Ford Taurus, N/A, Heated; Fits 2007-2012 Lincoln MKZ, N/A; Fits 2008-2011 Ford Ranger, N/A; Fits 2011 Mercury Mariner, N/A, Heated; Fits 2010-2011 Mercury Milan, N/A; Fits 2009-2010 Ford Escape, N/A; Fits 2005-2010 Ford Explorer, N/A, w/o Harness; Fits 2007-2010 Ford Explorer Sport Trac, N/A, w/o Harness; Fits 2010 Ford Taurus, N/A, w/ Heated Valve; Fits 2005-2010 Mercury Mountaineer, N/A, w/o Harness; Fits 2008-2009 Ford Taurus, N/A; Fits 2008-2009 Ford Taurus X, N/A; Fits 2008-2009 Mercury Sable, N/A; Fits 2007-2008 Lincoln MKX, N/A; Fits 2008 Mazda CX-9, N/A, To 1/7/08; Fits 2007 Ford Edge, N/A; Fits 2007 Ford Freestar, N/A; Fits 2004-2005 Ford Freestar, N/A; Fits 2007 Mazda CX-9, N/A; Fits 2003-2005 Lincoln Aviator, N/A; Fits 2004 Ford Explorer, N/A; Fits 2004 Ford Mustang, N/A; Fits 2004 Mercury Mountaineer, N/A; Fits 2003 Ford Explorer Sport Trac, N/A, w/ Heated Valve; Fits 2002-2003 Ford Mustang, N/A, w/ Heated Valve.

What This PCV Valve Helps Address

• Excess crankcase pressure
• Rough idle caused by ventilation flow issues
• Oil vapor buildup in the intake system
• Vacuum-related drivability concerns tied to a worn PCV valve
• Emission control faults related to crankcase ventilation performance

Installation Notes

Verify the connector style, hose size, and heated-valve or harness notes before installation. Standard Ignition V421 uses a screw-on design with a straight nipple, so matching the original routing and electrical connection style is important for proper fitment. This part cross-references MOOG Chassis Products EV261 for the same application.

Quality Assurance

Standard Ignition applies controlled manufacturing processes from component selection through finished product inspection. The brand states that its emission components are engineered to address common original-equipment failure patterns while maintaining quality control throughout production.