Complex sentence: The AMC I4 appeared in 1984 with the new XJ Cherokee and was produced through 2002 for the Jeep Wrangler and Dodge Dakota pickup, which used the AMC/Jeep designed four since 1996.
Split into simpler sentences: The AMC I4 first appeared in 1984 with the new XJ Cherokee. It was produced through 2002 for the Jeep Wrangler, as well as for the Dodge Dakota pickup that also used the AMC/Jeep designed four since 1996.