Cylinder Head Valvetronic Timing Actuator Motor 11377603979 for 135i, 228i, 320i, 328i, 428i, X1, X3, X4, X5, X6 with N20 and N55 engines.This replacement actuator motor is designed to restore Valvetronic system functionality.Constructed from metal and plastic components.Includes all necessary mounting hardware for installation.Compatible with the following models: 135i (2011–2013), 228i (2014–2016), 320i (2012–2015), 328i (2012–2015), 335i (2011–2015), 428i (2014–2016), 435i (2014–2016), 528i (2012–2016), 535i (2011–2016), 640i (2012–2015), 740i / 740Li (2013–2015), ActiveHybrid 3/5/7 (2012–2016), M235i (2014–2016), M3/M4 (2015–2016), X1 (2012–2015), X3 (2011–2016), X4 (2015–2016), X5 (2011–2016), X6 (2011–2016), Z4 (2012–2016).