The SM 4243 is a heavy-duty Self Starter Rocker Assembly (Brush Holder) specifically designed for the Latest Generation Tata Ace Gold (including Petrol, Diesel, and CNG variants). Utilizing a high-efficiency 4-brush configuration and a Lucas-style (LU.TYPE) design, this assembly is engineered to handle the rigorous duty cycles of the most popular mini-truck in India. It is a direct replacement for the #3953 series starters, providing the robust electrical contact necessary for constant stop-start commercial use.