This cooling supply hose is designed for the Volkswagen T4 equipped with auxiliary heating. It is compatible with T4 platform versions associated with engine codes 1X, AAC, ABL, ACU, AAB, ACV and AEN. As part of the restoration or maintenance of a classic vehicle, replacing this hose allows you to maintain the integrity of the cooling circuit and ensure reliable operation of the heating system. An essential replacement part to preserve the Volkswagen T4 in its original condition.