Ford Motor Company rarely offers any type of incentives on pre-owned vehicles. But now, the affects of the Firestone tire issue on used Ford Explorers and Mercury Mountaineers are prompting Ford to initiate this rare action. In a communication from Ford Motor Company to its dealers, Ford announced the program of low interest rates of either 5.9% or 7.9% for all 1997-2001 Explorers and Mountaineers for up to a term of four years, for qualified purchasers.