Cooler Flow Valve
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2007 MINI Cooper, 2006 MINI Cooper, 2005 MINI Cooper, 2004 MINI Cooper, and 2003 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.
The cooler flow valve controls the oil flow through the cooler when D position is engaged. The valve ensures enough oil flow during stall conditions or driving in high ratio for cooling, while ensuring sufficient system pressure is maintained at low engine speeds even under extreme temperatures.