The SM 4905 is a precision-engineered Starter Drive (Self Drive) designed for the Maruti Suzuki Zen and Zen Estilo platforms (often categorized under the SRF Zen technical series). Utilizing the refined DEN.TYPE (Denso-style) architecture, this unit features an 8-tooth pinion and a 10-spline internal configuration. It is precision-calibrated for the compact, high-efficiency planetary gear reduction starters used in Maruti’s K-Series and F-Series engines.