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1997 BMW 528I
2.8L I6 M52•RWD•AUTOMATIC•gas
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Repairs0Labor543Torque3361Fluid8DTC642Battery1Maintenance0Recalls0
P1521high severityPowertrain

Camshaft Position Actuator Bank 2 Tight

on 1997 BMW 528i 2.8L I6 M52 · RWD

What this code means

The DME detected that the intake camshaft position actuator (VANOS unit) on Bank 2 is mechanically tight or seized. The actuator cannot achieve its target position within the expected time.

Symptoms

  • Check Engine Light
  • VANOS rattle
  • Power loss at low RPM
  • Rough idle
  • Reduced fuel economy

Common causes

  • Worn VANOS unit seals Bank 2
  • Oil sludge in VANOS
  • Failing VANOS solenoid Bank 2
  • Insufficient oil pressure
  • Internal VANOS wear

Diagnostic steps

  1. Listen for VANOS rattle
  2. Check oil level and quality
  3. Monitor VANOS position Bank 2
  4. Test VANOS solenoid Bank 2
  5. Check oil pressure

Repair notes

Rebuild or replace the VANOS unit on Bank 2.

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