Power Steering Reservoir

The power steering reservoir stores hydraulic fluid and maintains proper fluid levels for the power steering system. This plastic or metal tank features a built-in filter screen, fluid level indicators, and connections for supply and return lines that feed the power steering pump.

A failing reservoir causes low fluid warnings, whining pump noise, hard steering at low speeds, fluid leaks under the vehicle, foamy or discolored fluid, and steering that feels heavy when parking or turning at idle.

Power steering reservoirs work closely with the pressure and return hoses that circulate fluid through the system. The reservoir cap maintains proper pressure and prevents contamination, while the reservoir hose connects the tank to the pump. When the reservoir develops cracks or the internal filter becomes clogged, it affects fluid flow and can starve the pump, leading to premature wear of these connected components.

Choose reservoirs with OE-matching fluid capacity and mounting points. Look for units with integrated filters and proper vent systems. Replace the reservoir when cracks appear, fluid levels drop frequently, or when installing a new pump to prevent contamination of fresh components.

How does a power steering reservoir work?

The reservoir stores hydraulic fluid under slight pressure and feeds it to the power steering pump through a pickup tube. It includes a built-in filter to trap contaminants and maintains fluid levels while allowing thermal expansion.

What are signs the power steering reservoir needs replacement?

Look for visible cracks in the tank, persistent low fluid levels despite no visible leaks, contaminated or foamy fluid, pump whining noises, and fluid seepage around reservoir mounting points or hose connections.

Can I use aftermarket power steering reservoirs?

Quality aftermarket reservoirs work well if they match OE specifications for capacity, mounting points, and hose connections. Ensure the unit includes proper filtration and venting systems to prevent pump damage and maintain system pressure.