2011 Mazda 2 - Need help identifying this, it's under the engine on the drivers side.

I have a blown head gasket and oil mixed into the coolant so I'm now trying to clean out the coolant system with water and detergent to try and get as much oil out before using the blue devil head gasket sealer. On my 3rd round of flushing the system I'm now hearing tinkering sounds coming from this part of the engine bay. I've looked all day but cannot find a positive answer. Any help would be greatly appreciated. Thank you

 

A: I assume your car is LHD
B: I assume you have a automatic transmission

If A&B are correct, that is the oil pan for your automatic transmission.