The SM 4239 is a heavy-duty Self Starter Rocker Assembly (Brush Holder) precision-engineered for the Hyundai Santa Fe and high-capacity SUV platforms. Designed to manage the high-torque requirements of the 2.2L CRDi diesel and 2.4L/3.3L petrol engines, this assembly features a robust 4-brush configuration. It is built to provide maximum electrical conductivity and durability for both standard ignition and vehicles equipped with modern stop-start systems.