BMW B58/B48 Engine Spark Plug 12122455258 SILZKBR8B8S 1 Series 3 Series 6 Series 7 Series X1 X3 Original Specification

This spark plug designed for BMW B58 and B48 engines, fits post-2000 1 Series (F20/F21), 3 Series (F30/G20), 6 Series (F06/F12), 7 Series (G11/G12), X1 (F48) and X3 (G01), covering 2.0T to 3.0T displacements. Core function is to precisely ignite the mixture for smooth power, high combustion efficiency, and reduced carbon build-up risk. OEM numbers 12122455258 and SILZKBR8B8S; cross-check with stock or OEM parts. Replacement difficulty: medium; use torque wrench per manufacturer standard (about 23-28 Nm) to avoid over-tightening and damaging head threads. This plug uses copper-nickel electrode, resistance 6 kΩ, thread size M14x1.25, reach 26.5 mm; significantly extends replacement interval and reduces maintenance, a reliable choice for bulk purchase.