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2012 BMW Z4
3.0L I6•RWD•AUTOMATIC•gas•turbo
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor493Torque4216Fluid8DTC1470Battery1Maintenance0Recalls4
29CEhigh severityPowertrain

Misfire Cylinder 3

on 2012 BMW Z4 3.0L I6 · RWD

What this code means

The engine control module detected a misfire on cylinder 3, meaning combustion is not completing properly. This is the BMW equivalent of OBD code P0303.

Symptoms

  • Rough idle
  • Engine hesitation
  • Check engine light flashing

Common causes

  • Faulty ignition coil
  • Worn spark plug
  • Fuel injector fault
  • Low compression or vacuum leak

Diagnostic steps

  1. Read freeze frame and confirm cylinder 3 misfire
  2. Swap coil and plug to another cylinder
  3. Test injector operation on cylinder 3
  4. Perform compression test on cylinder 3
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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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