The guide bearing cap with code 11.01254-0169.A is a precision structural component in the MAN L21/31 engine, designed to secure and support guide or bearing elements within the crankcase assembly. Its primary function is to maintain accurate alignment of rotating or guiding components, ensuring stable operation under high mechanical loads. Manufactured to tight tolerances and from high-strength materials, this bearing cap contributes to reduced vibration, controlled load distribution, and long-term reliability of the engine’s bearing system, particularly in continuous-duty marine and power generation applications.