LuK LMC451 Clutch Master Cylinder Fits BMW 92-98 Brand New. Transmission and Transaxle - Automatic > Manual Transmission Components > Clutch Master Cylinder. When it comes to clutches, Schaeffler is the international market leader with its LuK brand. Our technology is used in every third car worldwide and every second car in Europe. This makes Schaeffler the largest OE supplier to the automotive industry - for both conventional and self-adjusting clutches.For light commercial vehicles, trucks and tractors, Schaeffler's long-standing partnership with leading vehicle manufacturers provides the expertise that drives the development of our aftermarket repair solutions.