What brand of spark plugs does BMW use?

[MacReid]

BMW uses Bosch spark plugs. Spark plugs are a crucial component of the ignition system in gasoline engines. They introduce high-voltage electricity into the combustion chamber, causing it to jump the electrode gap and generate a spark, thereby igniting the combustible air-fuel mixture in the cylinder. How spark plugs work: The spark plug's ground electrode 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 center 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 center electrode, it breaks down the medium between the center electrode and the ground electrode, generating a spark to ignite 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 a design where the ignition coil is directly connected to the spark plug.