What is this part on my DRZ400? Bottom left side of engine, it’s leaking oil ever since I put it(01)

What is this part on my DRZ400? Bottom left side of engine, it’s leaking oil ever since I put it(01)

Video Screenshot Gallery: Drz400 Engine Leaking Coolant

2003 SUZUKI DRZ 400 leaking coolant from coolant pump : Fixxit
What is this part on my DRZ400? Bottom left side of engine, it’s leaking oil ever since I put it
Coolant leaks - DRZ400/E/S/SM - ThumperTalk