The Infiniti Q45 is a flagship luxury sedan that debuted in 1989, marking Infiniti's entry into the premium automotive segment. Across its generations, the Q45 evolved with advancements in technology, performance, and design while maintaining its focus on comfort and luxury. The model's dimensions changed subtly over time, reflecting both styling trends and engineering improvements. Today, the Infiniti Q45 remains a significant name in luxury sedans for offering a blend of performance, spaciousness, and elegance.