A coil spring is a heavy duty metal spring that sits on the lower wishbone and is a key part of a vehicle’s suspension system. It works as a shock absorber and compresses and expands to absorb the bumps and holes in the road as the vehicle is driven.
All coil springs are given a rating and if they need to be replaced, must be replaced with a spring of the same rating. This spring also has to have the same rating as the other spring. Because of this, it is highly recommended that you replace both springs at the same time.
There are many reasons why a coil spring can fail. Harsh weather has taken a huge toll, with salt and rust being a big problem. This isn’t usually a problem in newer springs as they have a plastic coating, however as this wears down over time it exposes the spring to the elements.
To prevent early damage to springs it is recommended that drivers should regularly clean underneath the vehicle with a pressure washer. This may prolong the life of the spring and other parts.