Strut
An integrated suspension component that combines a shock absorber, coil spring, and upper mount into a single structural unit.
A strut is a major structural component of a vehicle's suspension and steering systems. Most commonly used in MacPherson strut suspension designs, it combines several parts—including the damper (shock absorber), a coil spring, and a top mounting plate—into a single integrated assembly that connects the wheel hub to the vehicle's chassis.
Unlike a traditional shock absorber, which only dampens vibrations and does not support vehicle weight, a strut is a load-bearing member. It supports the weight of the vehicle, maintains the alignment position of the wheels, and acts as the pivot point for the steering system. As a result, worn struts directly degrade steering response, braking stability, and wheel alignment.
Struts wear out gradually over time and mileage, typically lasting between 50,000 and 80,000 miles. Signs of worn struts include excessive bouncing over bumps, body roll or swaying around corners, nose-diving during braking, uneven tire wear, and oily fluid leaking down the body of the strut housing.
Replacing struts is critical for driving safety and comfort. Because strut replacement requires disassembly of the suspension, it is highly recommended to perform a wheel alignment afterward to ensure proper tire wear and vehicle handling.