How often should power steering fluid be changed?

[Rodrigues]

Power steering fluid should be changed every 2 years or 40,000 kilometers. If the car uses an electric power steering system, there is no need to change the power steering fluid because the electric power steering system does not require power steering fluid at all. Only electro-hydraulic power steering systems and mechanical hydraulic power steering systems require power steering fluid. Both electro-hydraulic power steering systems and mechanical hydraulic power steering systems have a power steering pump and hydraulic mechanisms. The power steering pump in an electro-hydraulic power steering system is driven by an electric motor, while the power steering pump in a mechanical hydraulic power steering system is driven by the engine. Cars with electric power steering systems have lighter steering wheels, and the steering ratio and the level of steering assistance can be adjusted. Cars with hydraulic power steering systems have heavier steering wheels, but the hydraulic power steering system provides more direct feedback from the road, which is why many driving and handling enthusiasts prefer hydraulic power steering systems.