Recommended for replacement whenever the sending unit is serviced, this fuel tank sending unit lock ring securely retains the fuel pump assembly to the lock. Made of durable materials for reliable service. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Ford Crown Victoria: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011] - [Ford F-250 Super Duty: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007] - [Ford F-350 Super Duty: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007] - [Ford F-450 Super Duty: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007] - [Ford F-550 Super Duty: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007] - [Ford Grand Marquis: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004] - [Ford Mustang: 1998, 1999, 2000, 2001, 2002, 2003, 2004] - [Lincoln Town Car: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011] - [Mercury Grand Marquis: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011] - [Mercury Marauder: 2003, 2004]