Brand New 4WD Actuator Solenoid (Upgraded Design With Weather Shield) Mounts on passenger-side firewall behind the battery on most models Fits 1997-2006 Ford Expedition (Connector Notch At 6 o'clock Position) Fits 1995-1996 Ford Explorer (Connector Notch At 6 o'clock Position) Fits 1997-2009 Ford F150 (Connector Notch At 6 o'clock Position) Fits 1997-2000 Ford F250 (Connector Notch At 6 o'clock Position) Fits 1998-2006 Lincoln Navigator (Connector Notch At 6 o'clock Position) Fits 2006-2008 Lincoln Mark LT Pickup (Connector Notch At 6 o'clock Position) Replaces Ford 6L349H465BA, 6L3Z-9E441-A, 6L3Z-9H465-B, E8AE 9H465-BA, E8AZ 9H465-B Many failures are due to moisture intrusion that eventually cause the original solenoid to fail. Once it fails, your 4WD may fail to operate and your dash light may illuminate. This new design features a shield that wraps around to keep moisture and dirt out of the solenoid.