Oil coming out from the middle of my 316 se 2002 plate

Common oil leaks on a 3 series are:
1) Power steering hoses. If you have not yet replaced any power steering hoses on a 2002 I can almost promise you that one or more of them are leaking.
2) Valve cover gasket. Same comment as above. This tends to leak on the exhaust manifold side and stink like burned plastic as the synthetic oil burns on the manifold.
3) Oil line to the VANOS.
4) Oil filter housing.
Oil from any of these leaks will tend to move rearward as it makes its way to the ground.