Your car's suspension system is a network of components designed to absorb road impacts, maintain tire contact, and provide a smooth ride. Over time, these parts wear out due to stress, heat, and exposure to road debris. Knowing which parts commonly fail helps you diagnose problems early and avoid costly repairs. Here are the most common suspension parts that fail and what you should do about them.
Shop on Amazon
Browse the latest options and prices.
VNAPARTS WA54R7200AW US WA54R7600AC US WA54R7200AV US Washer Suspension Rods Parts for Samsung Washe
Shocks and Struts
Shocks and struts are the backbone of your suspension. They dampen spring oscillations and control body movement. Struts also serve as structural components in many vehicles.
Why they fail: Internal seals and fluid degrade over time, causing leaks. The pistons can wear, reducing damping ability. Typical lifespan is 50,000-100,000 miles, depending on driving conditions.
Symptoms of failure:
- Nose diving when braking
- Excessive bouncing after a bump
- Uneven tire wear (cupping)
- Fluid leaks on the shock body
- Steering feels loose or vague
Replacement guidance: Always replace in pairs (both front or both rear) to maintain balanced handling. Consider upgrading to gas-charged shocks for better performance.
Control Arm Bushings
Control arms connect the wheel hub to the vehicle frame via rubber or polyurethane bushings. These bushings allow controlled movement while isolating vibration.
Why they fail: Rubber dry rots, cracks, and loses compliance due to age, heat, and oil contamination. Misalignment or aggressive driving accelerates wear.
Symptoms of failure:
- Clunking noise over bumps
- Vague steering
- Excessive tire wear, especially on inner edges
- Visible cracking or splitting of the bushing material
Replacement guidance: Bushings can be pressed out and replaced individually, but many shops replace the entire control arm for labor savings. If you DIY, consider polyurethane bushings for longer life, but expect more road noise.
Ball Joints
Ball joints are spherical bearings that connect the control arms to the steering knuckles. They allow multi-axis movement for steering and suspension travel.
Why they fail: Grease leaks, torn boots, and metal-on-metal wear from internal friction. Common in vehicles with high mileage or poor maintenance.
Symptoms of failure:
- Clicking or popping when turning
- Steering wheel vibration
- Loose or wandering steering
- Excessive play when jacking up the wheel and checking for movement
Replacement guidance: Some ball joints are bolted in (serviceable), others are pressed-in (require new control arm). Check for recalls or technical service bulletins. Always replace in pairs on the same axle.
Tie Rod Ends
Tie rods transmit steering input from the rack to the steering knuckles. Inner and outer tie rod ends are common failure points.
Why they fail: Worn ball sockets, torn boots allowing dirt ingress, and corrosion from road salt. Frequent curb impacts also shorten life.
Symptoms of failure:
- Loose or sloppy steering
- Uneven tire wear (scalloping)
- Clunking when turning at low speeds
- Excessive play in the steering wheel
Replacement guidance: Replace in sets (inner and outer) per side. Always get a professional alignment after replacement. If you drive on rough roads, check every 30,000 miles.
Sway Bar Links and Bushings
Sway bars (anti-roll bars) connect the left and right suspension to reduce body roll. Links attach the bar to the control arms or struts, and bushings secure the bar to the chassis.
Why they fail: Links have ball joints that wear and develop play. Bushings dry out and crack. Salt and debris accelerate wear.
Symptoms of failure:
- Clunking or rattling from front or rear, especially on bumps
- Increased body roll during turns
- Metallic noise when driving over speed bumps
Replacement guidance: Sway bar links are inexpensive and easy to replace. Bushings can be replaced separately. Check for broken or missing hardware.
Strut Mounts and Bearings
Strut mounts attach the top of the strut to the vehicle body. They incorporate a bearing (for front struts) that allows the strut to turn with the steering.
Why they fail: Rubber components degrade, bearings lose lubrication and develop rough spots. Common after 60,000 miles.
Symptoms of failure:
- Clunking when turning at low speed
- Grinding noise when parking
- Visible sag or misalignment
- Steering wheel not centering properly
Replacement guidance: When replacing struts, always replace mounts and bearings. Some vehicles require special tools to compress springs.
Coil Springs
Coil springs support the vehicle's weight and absorb road impacts. They rarely fail but can break due to corrosion or fatigue.
Why they fail: Rust weakens the metal, especially in salt-belt regions. Overloading or severe potholes can cause fractures.
Symptoms of failure:
- Vehicle sits lower on one corner
- Unusual bouncing or sagging
- Clunking from a broken spring end
- Uneven tire wear
Replacement guidance: Replace in pairs (both front or both rear). Use a spring compressor for safe removal. Consider upgrading to heavier-duty springs if you carry loads.
Practical Final Recommendation
Prevent suspension failure by inspecting components every time you rotate tires or change oil. Listen for new noises and feel for changes in handling. Most suspension parts wear gradually, so catching them early saves money and improves safety. When replacing, use quality brands like Moog, AC Delco, or OEM parts—inexpensive parts may fail quickly. Always get a professional alignment after any suspension work. If you're not comfortable diagnosing, a certified mechanic can perform a thorough inspection and provide a repair estimate.
Staying proactive with suspension maintenance keeps your car driving like new and prevents unexpected breakdowns. Trust your senses—clunks, vibrations, and wandering steering are your car's way of telling you something needs attention.