21129221 : Vacuum diaphragm for Volkswagen Transporter T25 / Combi Bay Window

The vacuum diaphragm is an essential component of the vacuum circuit fitted to the Volkswagen Transporter T25, T3 and Combi Bay Window. As part of the restoration or maintenance of one of these classic vehicles, its replacement allows you to restore correct operation of the components controlled by vacuum. A faulty diaphragm can indeed cause malfunctions in the systems that depend on it. This new part therefore provides a reliable solution for keeping your vehicle in working order in accordance with the original specification.