N63T: Improvements to Bosch Spark Plug
BMW technical service bulletin 122514 for 2014-2015 BMW X5, 2009-2014 BMW 750LI and 2011-2014 BMW 550I and others.
- Bulletin number
- 122514
- Component
- Electrical system
- Summary
- N63T: Improvements to Bosch Spark Plug. Various engine performance symptoms could occur if the spark plug insulator becomes damaged: The Service Engine Soon (MIL) may be on with rough running and misfire fault(s) stored. Intermittent performance or rough running without a relevant DME fault stored. The spark plug insulator could be damaged in cases of combustion faults such as misfiring, ignition knock or super knocking conditions.
Owners of these vehicles have filed 89 complaints in the electrical category.
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