Brand New Complete Thermostat & Housing Kit Kit includes everything needed to repair the very common coolant leak on the 4.0L engine. Includes both upper & lower housings, new thermostat, & all needed o-ring seals Fits 2002-2010 Ford Explorer 4.0L (All Models) Fits 2002-2010 Mercury Mountaineer 4.0L (All Models) Replaces 2L2Z8592AA, 2L2Z8592BA, 2L2Z8592BB, 6L2Z8592FA, 4L5Z8592AA, RG614, RH165, RH167, RH147