Power steering reservoir AUDI A4 2001

OEM: 8E0422371B-2

Disassembled car photo

Engine running

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What is this part and why does it matter?

The power steering fluid reservoir stores hydraulic fluid for the power steering pump, with a dipstick or level markings to check fluid level.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

  • Fluid level low or dropping without an obvious leak elsewhere
  • Cracks or leaks visible on the reservoir
  • Whining noise from the pump due to low fluid level

Installation information

Bolts or clips into place, connected with hoses to the pump and rack — always refill to the correct level and bleed the system.

Frequently asked questions

Most often from age and heat cycling making the plastic brittle, or vibration loosening a mounting point over time.

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