Simplify the following text for a Grade 5 native English-speaking person.
Original: The 1996 model year marked another significant redesign of the then-aging 4Runner . Whereas the transition to the second generation 4Runner was one that kept the build quality and options roughly on par with the rest of the mid-size SUV market , the changes made in the third generation turned the 4Runner into a more luxury-oriented vehicle .
Simplified: The 4Runner was a compact SUV until 1996 .