if its not leaking, the you don't need to change it.
but correct me if I am wrong, since the oil sump pan/gearbox oil pan is dented, wouldn't the oil level dip stick reading will no longer be accurate?
So what needs to be changed and anyone knows what is the rough cost for it? Don't want to kena chop from workshops.
What car? My Wira one costs RM180 including sealant and it was a recon one. Suspect yours is a Honda? If yes probably gonna cost a bit more