Suspension Shock / Strut Mount Bushing

What Are Suspension Shock & Strut Mount Bushings?

Suspension shock and strut mount bushings are small but critical components that sit between your vehicle's shock absorbers or struts and the chassis or body structure. They act as the mechanical buffer between road forces and the passenger cabin, absorbing impact energy and isolating the body from the vibrations, noise, and harshness that every wheel cycle generates. On most modern vehicles, the strut cycles through suspension travel up to hundreds of times per mile — and every one of those cycles passes through these bushings.

For front strut-equipped vehicles, the mount assembly typically includes a mounting plate, an upper strut bushing, and a bearing that allows the strut housing to rotate freely as the steering wheel is turned. The bushing handles vertical load and vibration isolation, while the bearing accommodates steering rotation. Rear shock mounts use a simpler eye-bushing arrangement, but serve the same fundamental purpose: keeping the shock absorber firmly — and quietly — attached to the vehicle structure.

Why Strut Mount Bushings Wear Out and Why It Matters

These bushings endure relentless punishment. Over weeks, months, and years they are constantly compressed between the spring or shock and the body, and they gradually soften and deteriorate. When factory rubber bushings fail, the symptoms are hard to ignore: clunking or popping noises over bumps, increased road vibration in the cabin, vague or heavy steering feel, and even a notchy sensation when turning at low speeds. In severe cases, a failed mount bushing can accelerate wear on the shock absorber itself, affect wheel alignment, and cause uneven tire wear.

Because strut mount bushings and shock absorbers tend to wear at similar rates, most technicians recommend inspecting and replacing bushings any time new shocks or struts are installed. Skipping this step with new dampers risks compromising the performance of those fresh components right from the start.

Rubber vs. Polyurethane: Choosing the Right Material

Stock bushings are typically made from rubber, which is inexpensive and provides a compliant, quiet ride when new. However, rubber degrades under exposure to heat, oil, ozone, and road contaminants. Aftermarket polyurethane bushings resist these factors more effectively and maintain their shape and stiffness over a longer service life — translating to more consistent suspension geometry and improved handling response. One important note: polyurethane bushings often require different installation torque specifications than OEM rubber units, so always follow the manufacturer's guidelines carefully.

Top Brands for Suspension Shock & Strut Mount Bushings

Nolathane is a leading brand in this category and a name synonymous with polyurethane suspension engineering. With over 50 years of history, Nolathane's bushings are mechanically fitted — not compression-bonded like rubber — allowing the center pin to pivot freely for sharper handling response and reduced suspension flex. Their shock absorber bushings are designed to enhance the performance of both new and used dampers across a wide range of applications.

Super Pro is an Australian manufacturer with a dedicated research and development program that tests bushings in the lab, on road, and on track. Super Pro's specially formulated polyurethane is engineered to balance durability with compliance, making their strut mount bushings a strong choice for drivers seeking improved longevity without sacrificing ride quality.

Energy Suspension is a well-known name in the polyurethane bushing space, offering shock and strut mount bushings that upgrade worn factory rubber with a longer-lasting, performance-oriented alternative. Energy Suspension products are widely used in both daily-driver restorations and enthusiast builds.

Fairchild rounds out the lineup with reliable replacement bushing options suited for drivers focused on restoring factory ride quality and eliminating unwanted noise and vibration at the shock or strut mounting points.

Delphi brings OE-level engineering pedigree to this category. As a major supplier to original equipment manufacturers, Delphi's suspension components are engineered to meet or exceed factory specifications, making them a solid choice for those seeking a like-original replacement.

What to Consider When Shopping

• Material: Rubber offers OE-like compliance; polyurethane offers greater longevity and improved handling precision.
• Application fit: Always verify compatibility with your specific year, make, and model before purchasing.
• Replace in pairs: For balanced handling and even wear, replace both sides at the same time.
• Timing: If you're already replacing struts or shocks, adding new mount bushings is a low-cost way to protect your investment.