Jeep grand Cherokee engine ECU 56027285 interchanges with - 56027813 56028300 Up for Sale is a Working, in excellent condition Jeep grand cherokee engine ECU. This is the unit that works with many grand cherokees - From a 1994 4.0 liter I6 car with auto transmission & cal emission - a hard one to find! Part number listed at the top or in the large pictures. Check the part number off your original to be sure this is right for your car, I have several of these units for grand cherokees. This may fit more years than just this, check your part number. If it matches, this will fit your car.These are very hard to find in good working condition. This unit was runtested & is functional, and offers a 30 day warranty. Please be sure to double check the part number off your original unit before buying. A defective unit is one of the most common no start or random stalling problems with these trucks. They can also be the cause of erroneous check engine lights, cold or hot start problems, or idle control malfunctions. If yours does not have problems, keep an extra ECU in the trunk, you might some day be glad you did... These units have been NLA for a while now, and finding a correct unit is nearly impossible. Thanks for looking!