STARTER MOTOR TO SUIT BMW 3 SERIES 320I N43B20 N46NB20 N46B20B N46B20 2.0L I4 EXCEPT CONVERTIBLEStarter Motor: Practical Starting Support for Reliable Operation A starter motor is an important part of a vehicle starting system, helping your vehicle begin operation when the ignition key is turned or the start button is pressed. Also known as a car starter motor, auto starter motor, starter assembly, ignition starter, or replacement starter motor, it works with the vehicle electrical system to support the starting process. Over time, regular use,