The BMW E90 3 Series 325i CAS Module 2 comfort access control module is a specific replacement part for a subset of BMW vehicles. It is an Engine Control Unit (ECU) with a Flash memory and Pin terminal type, designed for easy installation with a bolt-on mounting style. This module provides access control and does not offer protection lock functionality. The OE/OEM part number for this specific BMW module is 61.35-6943791.