The STIHL 11184043500 Ignition Module is a genuine OEM replacement part designed to provide consistent and reliable ignition for various STIHL chainsaw models. This essential component ensures proper spark timing, crucial for efficient engine operation and starting. It is specifically compatible with STIHL MS 170, MS 180, 017, and 018 chainsaws, maintaining the original equipment quality and performance. Replacing a faulty ignition module with this authentic STIHL part helps restore optimal engine function and extend the lifespan of your equipment.