Too much unnecessary motion of the lock cylinder, malfunctioning or ineffective operation of windshield wipers and radio, and no sound produced whenever the start position is engaged in the starter are but some of the indications that there is something wrong with the ignition switch of your BMW. The BMW ignition switch is divided into two portions, the front and the rear portions. While a key tumbler lock mechanism is included in the front portion, an electrical switch is located at the rear portion. A mechanism that detects whether the key is inserted into the tumbler - the plunger - is also included. This small plunger sounds when you open one of the car doors or you left a key in the ignition. The BMW ignition switch can only be operated when the key is inserted. Without the key in the ignition, the engine operation and starting will be disabled. The engine operation and starting could only be activated when the key is inserted to allow some form of security for the use of your vehicle. The ignition switch could be turned or rotated for you to choose among the three positions that are labeled as off, run or on, and start. But a choke or prime indicator can be engaged when the key is further forced into the ignition. Through the ignition switch of your BMW, you could control the operation of the engine and starter motor and connect the priming circuit that starts the engine when the push switch is engaged. A malfunctioning ignition switch could be a disturbance to your manipulation and handling of the vehicle, so take your car to a maintenance check regularly. If you discovered the signs mentioned above, it is about time to get a replacement for your BMW ignition switch. For that, click on our website for quality and durable aftermarket auto parts.