Genuine BOSCH Working Cylinder
Part number 8346955174

A power steering slave cylinder, also known as a power steering actuator, is an essential component of a car's power steering system. Its main function is to convert hydraulic pressure into mechanical force. The cylinder is connected to the steering linkage and receives input from the power steering pump, which supplies hydraulic fluid under pressure. As the driver turns the steering wheel, the pump sends pressurized fluid to the slave cylinder, causing it to extend or retract. This movement is then transferred to the steering mechanism, helping to ease the effort required to steer the vehicle.

Inside the power steering slave cylinder, there are two chambers separated by a piston. One chamber is connected to the power steering pump, while the other is connected to the steering linkage. When pressurized fluid enters the cylinder, it pushes against the piston, causing it to move and apply force to the steering mechanism. This force assists the driver in turning the wheels smoothly and with less effort, especially at low speeds or when making tight maneuvers. The slave cylinder helps maintain a consistent level of hydraulic pressure, allowing for precise and responsive steering control.