What Causes Black Build-Up on the Spark Plugs in a BMW?
Every component in your vehicle, including your spark plugs, is crucial to the vehicle’s smooth running of all its systems. The spark plugs are the reason your BMW starts whenever you turn the ignition. They are inside the combustion chamber, where they ignite the fuel/air mixture and allow the engine to produce horsepower.
One of BMW’s most commonly-seen problems is the buildup of carbon around the …