TOYOTA 90445-18138 Power Steering Reservoir Hose

The genuine TOYOTA (SKU: 90445-18138) power steering reservoir hose is a premium-quality, original component engineered for the reliable and safe operation of the hydraulic power steering system. This hose ensures the unobstructed flow of hydraulic fluid between the power steering fluid reservoir and the rest of the system.

Technical Characteristics and Function:

The power steering reservoir hose plays a vital role in maintaining steering assistance. Because hydraulic fluid circulates through the system at high temperatures and under continuous vibration, the hose is manufactured from a specialized oil- and heat-resistant elastomer with internal reinforcement to prevent expansion and cracking.

• Part Type: Power steering reservoir hose (low-pressure hydraulic hose)
• Manufacturer: TOYOTA (OEM genuine part)
• Material Composition: High-strength, oil-resistant synthetic rubber with internal fabric reinforcement
• Resistance: Outstanding heat tolerance, resistant to high engine bay temperatures and the chemical effects of hydraulic fluid

Typical Signs of Wear and Failure:

Over time, the rubber material may degrade, lose flexibility, or crack due to continuous thermal stress. Common symptoms of failure include:

• Oil Leaks: Wet spots or active dripping at connection points or through the hose wall.
• Air in the System: If the hose is compromised, the pump may draw in air, resulting in noisy power steering operation and heavy steering.
• Fluid Level Drop: A gradual loss of fluid in the power steering reservoir, which can lead to power steering pump damage.

Genuine TOYOTA parts ensure a precise fit, factory-specified flow cross-section, and a long service life.