BMW X5: AC Housing-Evaporator

 HDC Hill Descent Control

Principle HDC Hill Descent Control is a downhill control feature that controls the vehicle speed on steep downhill grades, for instance when driving on unpaved roads. General information When the system is active, the vehicle moves at the speed set by the driver, without the driver having to depress

 Crankcase

As far as the physical appearance and dimensions, the crankcase on the N54 is the same as the N52. The main change is in the materials, the N54 uses an all aluminum alloy crankcase. There is also cast iron cylinder liners similar to the previous M54 engine. The reason for using the all aluminum c