A high-pressure pump plunger housing for the Citroen DS is a vital component of the hydraulic system responsible for power supply in the car. The plunger housing includes the casing within which the plunger or piston operates, often under high pressure, to distribute and regulate hydraulic fluid. This system is crucial for the operation of the Citroen DS's suspension, steering, and brakes, ensuring smooth driving behavior and precise control. Replacing or maintaining it is essential for the long-term performance and safety of the iconic DS models.