Complex sentence: Early build quality of the 800 was demonstrably poor J.D. Power, customer satisfaction fell quickly and sales fell away from this initial high to less than 2,000 for 1991.
Split into simpler sentences: Early build quality of the 800 was demonstrably poor as measured by J.D. Power. Customer satisfaction fell quickly and sales fell away from this initial high to less than 2,000 for 1991.