TOYOTA 90440-17054 Body Mount Bushing Sleeve

The genuine Toyota 90440-17054 body mount bushing sleeve (spacer tube) is a precision-engineered fastening component that plays a vital role in connecting the vehicle chassis and body. This metal sleeve is positioned inside the flexible (rubber or polyurethane) body mounts, ensuring proper alignment and tension of the mounting bolts.

Technical Features and Function

The primary function of the sleeve is to act as a positive stop (spacer) when tightening the mounting bolt. This prevents excessive compression and premature failure of the rubber mounts, while ensuring structural rigidity and effective vibration absorption.

• Material: High-strength steel alloy with an anti-corrosion coating, offering resistance against environmental exposure (moisture, mud, road salt).
• Design: Cylindrical tube/sleeve manufactured to precision tolerances for an exact fit.
• Application: Located at the body mounting points of body-on-frame vehicles.

Signs and Consequences of Failure

Because the sleeve is constantly exposed to environmental elements and mechanical stress, it can wear out over time. Common symptoms of failure include:

• Corrosion: Rust weakens the structure of the sleeve, which can lead to reduced wall thickness or complete structural collapse of the sleeve.
• Cabin Noise: Metallic knocking, squeaking, or rattling sounds audible when driving over uneven road surfaces.
• Increased Vibration: Vibrations from the engine and road surface are transferred more directly to the cabin.
• Deformation: Severe mechanical impact (such as collisions or extreme off-road conditions) can bend the sleeve, compromising mounting stability.