Yamaha Oil Pan Set 99999-03915-00. Overview. The Yamaha Oil Pan Set 99999-03915-00 is a genuine original equipment manufacturer assembly designed to securely contain engine oil and support proper lubrication system function. This oil pan set plays a vital role in collecting and storing oil, allowing it to circulate efficiently throughout the engine to reduce friction and prevent wear.. A properly functioning oil pan is essential for maintaining engine health and performance. Over time, oil pans