Prothane Polyurethane Rear Sway Bar Bushings Kit 4WD (1989-95 Pickup)

Prothane Polyurethane Rear Sway Bar Bushing Kit – 18mm

For 1990–1995 Toyota 4Runner 4WD

Overview

Restore rear suspension control, cornering stability, and predictable handling in your 1990–1995 Toyota 4Runner 4WD with the Prothane Polyurethane Rear Sway Bar Bushings for 18mm sway bars.

This direct-fit suspension kit replaces aging factory rubber sway bar bushings with durable polyurethane components. Worn rubber bushings can allow excessive sway bar movement, contributing to increased body roll, suspension noise, and less consistent handling. Prothane polyurethane helps maintain a secure connection between the rear sway bar, chassis mounts, and end links for more controlled suspension response.

This Prothane Polyurethane Rear Sway Bar Bushing Kit fits 1990–1995 4Runner 4WD models with an 18mm rear sway bar. Because older vehicles may have replacement or modified suspension components, physically measure the rear sway bar before ordering.

Features

• Complete rear sway bar bushing kit
• Designed for 18mm factory-style rear sway bars
• Precision-molded polyurethane construction
• Direct replacement for worn factory rubber bushings
• Helps reduce unwanted rear sway bar movement
• Improves cornering stability and suspension response
• Helps control body roll during directional changes
• Resists deterioration from oil, grease, moisture, road salt, ozone, and environmental exposure
• More durable and compression-resistant than conventional rubber
• Includes installation lubricant
• Manufactured by Prothane Performance Suspension

Performance Benefits

Replacing deteriorated rear sway bar bushings can help restore proper sway bar operation and improve overall vehicle control.

Benefits include:

• More consistent rear suspension response
• Reduced body roll during cornering
• Improved stability during lane changes and evasive maneuvers
• Reduced movement between the sway bar and mounting points
• Potential reduction in squeaks, clunks, and suspension noise caused by worn bushings
• Longer service life than aging factory rubber components
• Suitable for daily driving, restoration, towing, overlanding, and recreational off-road use

What’s Included

Kit components include:

• Rear sway bar frame-mount bushings
• Rear sway bar end link bushings
• Rear sway bar hardware
• Polyurethane installation lubricant

Vehicle Fitment

Fits 1990–1995 Toyota 4Runner 4WD models equipped with a factory-style 18mm rear sway bar. 

Second-Generation Toyota 4Runner

• 1990 Toyota 4Runner 4WD
• 1991 Toyota 4Runner 4WD
• 1992 Toyota 4Runner 4WD
• 1993 Toyota 4Runner 4WD
• 1994 Toyota 4Runner 4WD
• 1995 Toyota 4Runner 4WD

Compatible configurations may include:

• 2.4L 22RE four-cylinder engine
• 3.0L 3VZ-E V6 engine
• Manual transmission
• Automatic transmission
• Factory-style rear sway bar
• 18mm rear sway bar diameter

Measure Before Ordering

This kit fits an 18mm rear sway bar only.

Vehicle year, engine, trim level, or VIN should not replace physical measurement because suspension parts may have been changed during previous repairs or modifications.

Measuring With Calipers

1. Clean a straight, rust-free section of the rear sway bar.
2. Measure the outside diameter with digital or vernier calipers.
3. Confirm that the measurement is approximately 18mm.

Measuring Without Calipers

1. Clean a straight section of the rear sway bar.
2. Slide an 18mm open-end wrench over the bar.
3. A close, snug fit indicates an approximately 18mm sway bar.
4. If the wrench does not fit or leaves substantial clearance, measure with calipers before ordering.

Do not measure over a bend, mounting sleeve, thick rust, paint buildup, or damaged section.

Installation Notes

• Fits factory-style 18mm rear sway bars only
• Measure the rear sway bar before ordering
• Clean the sway bar and mounting surfaces before installation
• Remove rust, dirt, and deteriorated rubber residue from all contact areas
• Apply the supplied polyurethane grease to the specified bushing surfaces
• Inspect the sway bar, brackets, end links, sleeves, and fasteners for damage
• Replace bent, corroded, or excessively worn hardware as needed
• Tighten all fasteners according to the factory service manual
• Professional installation is recommended when mounting hardware is seized or suspension components are heavily worn

Available Bushing Colors

Black Polyurethane

A subtle, factory-inspired option that blends with original suspension components.

Red Polyurethane

Prothane’s traditional performance appearance for a more visible suspension upgrade.

Black and red versions provide the same intended fitment and function. Color selection is based on appearance.

Why Choose Prothane?

Prothane manufactures polyurethane suspension components designed as durable alternatives to aging factory rubber bushings. For this application, Prothane specifically catalogs an 18mm rear sway bar and end link bushing kit for 1990–1995 Toyota 4Runner 4WD models, making it an application-specific option for restoring rear sway bar operation.