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Troubleshooting power steering

Condition

Cause

Correction

     
Noise Intake line kinked Correct hose routing, or replace
  Air in system Tighten all clamps and fittings, bleed system
    Radial seal leaking air, replace seal
  Low fluid level Repair leak, fill and bleed system
Low pressure Loose belt Tighten belt
  Internal pump seals faulty Rebuild power steering pump
  Internal wear in pump Replace pump
Leaky pump Bad seals Rebuild pump
 

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E30 M3 Repair Manual V2.7.  Copyright ©1999-2001 Koala Motorsport & Brett Anderson