The Ford Explorer 4.01 is a popular mid-size sport utility vehicle (SUV) manufactured by the American automaker Ford Motor Company. Introduced in 1990, it has undergone several redesigns and improvements over the years. The "4.01" in its name refers to the 4.01-liter V6 engine that was initially used in this model. The first generation of the Ford Explorer (1991-1994) featured the 4.01-liter V6 engine, which produced 160 horsepower and 245 lb-ft of torque. This vehicle was known for its spacious interior, versatile cargo space, and off-road capabilities. It became a favorite among families and adventure enthusiasts alike. In 1995, the second generation of the Ford Explorer was released, which included a 4.0-liter V6 engine that produced 210 horsepower and 250 lb-ft of torque. This generation featured a more modern design, improved safety features, and a more comfortable ride. The Ford Explorer became one of the best-selling SUVs in the United States during this time. The third generation (1999-2002) saw a slight decrease in engine size to 3.9-liter, but the power output remained at 210 horsepower. This generation also introduced the option of a 5-speed automatic transmission. The fourth generation (2002-2005) brought a significant redesign, including a new 4.6-liter V8 engine that produced 292 horsepower and 300 lb-ft of torque. This generation also introduced the option of all-wheel drive, making the Ford Explorer even more capable on various terrains. In 2006, the fifth generation of the Ford Explorer was launched, featuring a 4.0-liter V6 engine that produced 210 horsepower and 250 lb-ft of torque. This generation also introduced a new independent rear suspension system, improving the vehicle's ride comfort and handling. The sixth generation (2011-2020) saw a complete redesign, with the Ford Explorer transitioning to a unibody construction and adopting a more car-like feel. The 3.5-liter EcoBoost V6 engine became available, producing 365 horsepower and 350 lb-ft of torque. This generation also introduced advanced safety features and a more luxurious interior. The current, seventh generation of the Ford Explorer (2020-present) continues to offer a range of engine options, including a hybrid powertrain. The vehicle has evolved in design and technology, maintaining its position as a popular choice in the mid-size SUV market. In conclusion, the Ford Explorer 4.01 is a historical model within the Ford Explorer lineup, representing the early years of this iconic SUV. Throughout the years, the Ford Explorer has evolved and improved, offering customers a versatile and reliable vehicle that caters to various needs and preferences.