B5.5 Power Steering Return LINE 8D0422885K

8D0422885K

• Volkswagen Passat (B5 chassis): 1997 to 2005 (for 1.8T, 2.8 V6, and 1.9TDI engine variants)
• Audi A4 (B5 chassis): 1995 to 2001 (for 1.8T, 2.8 V6, and 1.9TDI engine variants)
• Škoda Superb (Mk1): 2002 to 2008 (for 1.8T, 2.8 V6, and 1.9TDI engine variants)

Replacement of the power steering cooler line is necessary when it is damaged or fails, which can happen due to various factors: 
Damage from a front-end collision: The power steering cooler is located in front of the radiator, making it susceptible to damage from even a minor front-end accident.
Fluid leaks: Over time, corrosion, vibration, or damage can cause the pipe to leak power steering fluid. A leak will cause a gradual loss of power steering fluid, leading to decreased steering performance.
Wear and tear: Exposure to road debris, salt, and other elements can cause the metal pipe to rust or the connections to wear out.
Blockages: Internal corrosion or debris can cause a blockage that restricts fluid flow, leading to overheating and damage to other power steering components, like the pump. 
Risks of not replacing a faulty line
Ignoring a faulty power steering cooler line can lead to several problems:
Premature pump failure: Without proper cooling, the power steering fluid can overheat and lose its lubricating properties, causing the power steering pump to fail.
Damage to the steering rack: Overheated and degraded fluid can damage the seals inside the steering rack, leading to more extensive and costly repairs.
Catastrophic failure: A ruptured or blocked cooler line can cause a sudden loss of power steering assist, which is dangerous, especially when maneuvering at low speeds.