Genuine OEM Audi crankshaft, part number 079105101BC. This core engine component is responsible for converting the reciprocating motion of the pistons into rotational force to drive the transmission. It is precision-machined to exact factory tolerances to ensure smooth engine operation and long-term durability. Genuine OEM crankshafts are essential for maintaining the correct balance and rotational mass required for optimal engine performance and vibration-free service life.