The LESJOFORS 4442102 rear coil spring is engineered to meet or exceed original equipment specifications for the 1999-2004 Jeep Grand Cherokee. Manufactured from high-strength steel, this spring undergoes rigorous heat treatment and shot peening processes to enhance durability and resistance to fatigue. A multi-layered corrosion-resistant coating, including zinc phosphate and epoxy powder coat, ensures long-lasting protection against environmental elements, reducing the need for premature replacements and minimizing downtime. The spring is pre-set and thoroughly tested to guarantee a precise fit and optimal performance, contributing to a smooth, stable ride and improved vehicle handling. By maintaining the integrity of your vehicle's suspension system, this coil spring helps prevent premature wear and tear on other critical components, thereby reducing maintenance costs and extending the vehicle's service life.