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p0301
Easy Fix
BMW · SUVs
Cylinder 1 Misfire Detected
Quick Answer
Error code P0301 on your BMW SUVs means: Cylinder 1 Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
X1 M35i 2024X1 xDrive28i 2024X3 M 2024X3 M40i 2024X3 xDrive30i 2024X5 M 2024X5 M60i 2024X5 xDrive40i 2024X5 xDrive50e 2024X6 M 2024X6 M60i 2024X6 xDrive40i 2024X7 M60i 2024X7 xDrive40i 2024iX M60 2024iX xDrive50 2024X1X3 MX3X5 MX5X6X7iX
Likely Causes
  1. Faulty ignition coil on cylinder 1
  2. Worn or fouled spark plug on cylinder 1
  3. Clogged or leaking fuel injector on cylinder 1
  4. Low compression in cylinder 1 due to valve or piston ring wear
  5. Vacuum leak near cylinder 1 intake runner
How to Fix It
1
Swap the ignition coil from cylinder 1 with another cylinder and retest
2
Replace the spark plug on cylinder 1
3
Test fuel injector resistance and spray pattern on cylinder 1
4
Perform a compression test on cylinder 1 and compare to other cylinders
5
Clear the code and monitor for misfire recurrence
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Ignition coil
Spark plug
Fuel injector
Intake runner gasket
Related Error Codes
P0171P0174P0300P0335P0340
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