This genuine Stihl ignition module (MPN 1141 400 1303) is designed for use with compatible MS 271 and MS 271 C chainsaws. As an essential component of the ignition system, it generates the electrical spark required to ignite the fuel mixture and start the engine. Manufactured to Stihl’s original standards, this OEM replacement is built for reliable performance and proper fitment, making it a suitable choice for replacing a worn or faulty ignition module.