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Suspension Coil Spring Replacement Service and Cost. What is a coil spring? Coil springs allow the vehicle to absorb bumps, and keep the passenger comfortable. The coil springs hold the weight of the vehicle, and allow the wheels to travel vertically when the wheels encounter an obstacle.
There are different types of springs for each kind of automobile and truck depending on your vehicle's suspension design, but the the most common is the coil spring. A coil spring (also called helical spring) is a kind of torsion spring which can store energy and release it later when needed.