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p0300
Moderate
BMW · Sedans
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your BMW Sedans means: Random/Multiple Cylinder Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
330i530i540i740i760i330e 2024330i xDrive 2024530i 2024530i xDrive 2024540i xDrive 2024545e xDrive 2024740i 2024740i xDrive 2024760i xDrive 2024M3 CS 2024M3 Competition 2024M3 Competition xDrive 2024M340i xDrive 2024i4 M50 2024i4 eDrive35 2024i4 eDrive40 2024M3M340ii4i5
Likely Causes
  1. Worn or fouled spark plugs
  2. Failing ignition coils
  3. Vacuum leaks causing lean misfires
  4. Low fuel pressure or clogged fuel injectors
  5. Worn valve stem seals or low compression
How to Fix It
1
Read freeze frame data to determine misfire conditions
2
Inspect and replace spark plugs if worn or fouled
3
Swap ignition coils between cylinders to isolate a faulty coil
4
Perform a compression test on all cylinders
5
Check fuel pressure and inspect injectors
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Spark plugs
Ignition coils
Fuel injectors
Valve cover gasket
Related Error Codes
P0171P0174P0335P0340P0420
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