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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.
Photo courtesy BOSE. BoseÂ® Suspension Front Module. Â­While there have been enhancements and improvements to both springs and shock absorbers, the basic design of car suspensions has not undergone a signÂ­ificant evolution over the years.