1、REPLACEMENT FOR: This front driver door lock actuator motor is fit for 325CI, for 330CI, for M3 and the OE number is 51217011247,and with very high compatibility. 2、FUNCTION: Replace front driver left lock actuator, this door lock actuator motor is manufactured to the OE specification to provide factory fresh appearance and direct fit, that enables proper door locking function. OE connector helps ensure a stable, positive connection. 3、DIRECTLY REPLACEMENT: This door lock actuator has undergone extensive quality and safety testing to ensure reliable performance. It is engineered to provide a direct replacement for the stock actuator on specific vehicle years, makes and models. 4、EFFECTIVE: Front right lock vehicle application resolves remote open problem and help to restore the vehicle door lock proper operation. 5、DURABLE: Replacement door lock actuator works as good as the original, constructed of premium material for long lasting durability and reliability.