Rear Spring Upper Isolator for Smooth, Quiet Suspension ️

This upper rubber seat sits on top of the rear coil spring and cushions the contact with the body perch. It cuts noise, vibration, and harshness (NVH),stops metal-on-metal wear, and helps maintain correct ride height and alignment feel. A fresh isolator protects the spring perch from rust and keeps the rear of your vehicle composed over bumps.

Why this part is needed

Without a healthy rubber interface, impacts travel straight into the cabin. You’ll hear squeaks and clunks, the ride gets harsher, and the perch can wear or corrode. Replacing this seat restores quiet comfort and preserves chassis components.

How it works ⚙️

Mounted between the spring’s pigtail and the upper perch, the molded elastomer spreads load evenly, damps micro-movement, and isolates road shock. Grooves index the spring end so it sits true, keeping the coil aligned through full suspension travel.

If it’s worn or broken ⚠️

Expect clunking over speed bumps, rear-end shimmy, uneven tire wear, and possible spring paint damage leading to corrosion. Severe decay can let the spring bite into the perch, causing ride-height variations and accelerated bushing wear.

Tech tips ✅

Replace in pairs, clean the perch, align the spring end to the stop, and torque fasteners at ride height. Use OEM-grade rubber for OE NVH performance. A light silicone-safe lube helps seating—avoid petroleum on elastomers.

Compatibility

• QX50