Coil Springs: Repair and Regular Inspections Explained

What coil springs do

Most modern vehicles use coil springs, which are helical steel springs that usually wrap around the struts or shocks. They support the vehicle at its intended ride height, help maintain alignment and absorb road shock. Heavier vehicles use stiffer springs, and lighter vehicles use softer ones.

How they wear

Endless flexing gradually weakens coil springs. A weak or broken spring can make the vehicle sag on one corner or one side. That can shift steering and suspension geometry, affect handling and wear tires unevenly.

Signs of a worn or broken spring

• The vehicle sits lower on one corner or side
• A rough, bouncy or unsettled ride
• Clunking or rattling over bumps
• Uneven tire wear
• Poor handling or a vehicle that pulls or wanders

Repair and inspection

Replacing a worn spring restores the vehicle’s ride height. Springs are usually replaced in pairs on the same axle, and an alignment afterward helps keep steering correct. Springs should be inspected along with the struts, shocks, sway bar links and bushings. Many owners’ manuals list suspension checks with scheduled service; ask your service advisor what is right for your vehicle.

Safety note

A broken coil spring can affect control of the vehicle and can damage a tire or brake hose. If you hear a loud bang followed by a noticeable drop or lean, or see a broken spring, stop driving and have the vehicle towed in.