The KONTAKTPUNKT SEV S403 is an essential component ensuring the proper functioning of the ignition system in various classic Citroën and Peugeot models including Citroën C25, DS, 11CV, 15CV, and HY, as well as the Peugeot 204, 304, 404, 504, and J5. This contact point is crucial for providing the electrical contact needed to deliver sparks to the spark plugs, facilitating efficient combustion in the engine. It is a reliable, durable part, specifically designed to meet the specifications and needs of these vintage vehicles, ensuring consistent ignition and optimal engine performance.