The 18121 is a brake disc designed for compatibility with various vehicles, featuring an outer diameter of 348 mm and a thickness of 36 mm, with a minimum thickness of 34.4 mm. It has a vented construction suitable for models such as the BMW 5 Series, with a rim hole configuration of 5 holes and a bolt hole circle diameter of 120 mm. The disc is suitable for vehicles with engine power ranging from 136 to 449 horsepower (100 to 330 kW) and is manufactured to meet specific technical standards. Additionally, the 18121 part number is associated with other components such as timing belts, exhaust gas recirculation coolers, barrier pipes, and drive shaft bellows, making it a versatile component within automotive systems.

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