What brand are BMW spark plugs?

[SamuelAnn]

BMW spark plugs are of the Bosch brand. Spark plugs are a crucial component of the gasoline engine ignition system. They introduce high-voltage electricity into the combustion chamber and create a spark by jumping the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. Working principle of spark plugs: The ground electrode of the spark plug is connected to the metal shell, which is threaded into the engine block via the cylinder head. The insulator primarily serves to isolate the metal shell from the central electrode. The terminal nut is the part of the spark plug that contacts the high-voltage coil. When current passes through the terminal nut and the central electrode, it breaks down the medium between the central electrode and the ground electrode to generate a spark, thus igniting the air-fuel mixture in the cylinder. Location of spark plugs: Spark plugs are installed on the side or top of the engine. In earlier designs, spark plugs were connected to the distributor via ignition cables. However, over the past decade, most car engines have transitioned to direct connection between the ignition coil and the spark plug.