12 13 Notes on checking ignition system
WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Troubleshooting -> Fault in fuel injection system
-> Spark plug faults
-> Ignition coil faults
-> FURTHER FAULT PATTERNS WITH EVALUATION
-> Additional fault notes for troubleshooting . See 12 13... ADDITIONAL FAULT NOTES FOR TROUBLESHOOTING or 12 13... ADDITIONAL FAULT NOTES FOR TROUBLESHOOTING .
Oscillograms -> Normal oscillogram
-> Oscillograms of ignition coils from different manufacturers
Check -> SECONDARY SIGNAL FOR STATIONARY IGNITION DISTRIBUTION