PERFECT FITMENT: :Fit For 2003-2010 Expedition; 2008-2010 Navigator.PACKAGE & WARRANTY: :Package Includes 1Pcs X 5-btn Car Key Fob Keyless Entry Remote. Any question just contact us, we will reply you within 24H.And we offer a 12 month warranty.EASY DIY PROGRAMMING: : premium CWTWB1U551 5-btn Car Key Fob Keyless Entry Remote can unlock the car quickly compared to using ordinary car keys. On the Remote Keyless Entry (RKE), a long distance antenna is equipped to transmit signals to the vehicle.OPTIMAL PERFORMANCE: : premium CWTWB1U551 5-btn Car Key Fob brand new perfectly replaces your lost or broken remote car key fob quickly and easily. NOTE: 1:Key fob will not work if your original key fob has the smart key or proximity feature. 2:if there is "LIFT GATE" and "REAR GLASS" on your original blue button,this key fob will not work. 3:your original key fob MUST has the blue truck buttons,otherwise ,this key fob will not work.REPLACE PART NUMBER: : CWTWB1U551 .item has been pre-tested to ensure quality and functionality.perfect thoughtful affordable gift for every car enthusiast.Durable long lasting construction.